SAXSdb — 2nqb

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1. Protein Identity and Related Structures Protein Identity & Related Structures

Histone H3

Drosophila melanogaster

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Protein–DNA Heteromer Protein × 8 DNA 2 PDB declaration: decameric（10） Consistent with all polymer counts	Chain A； UniProt 1–135 Chain E； UniProt 1–135	Not recorded	alpha-satellite DNA × 2 Histone H4 × 2 （P84040） Histone H2A × 2 （P84051） Histone H2B × 2 （P02283）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, SITTING DROP；pH 6；292 K；Constituents of the crystallization buffer: Potassium Chloride, Manganese Chloride, and Potassium Cacodylate., pH 6.0, VAPOR DIFFUSION, SITTING DROP, temperature 292K	Resolution 2.30 Å R-free 0.254

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB	Difference from Current Entry 2NQB	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1KNA Chromo domain of HP1 complexed with histone H3 tail containing dimethyllysine 9. Deposited 2001-12-18	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain P 1–16（16 aa） Fragment：Residues 1-16	Mutation：P16Y Non-standard monomer：Yes (specific site not provided by mmCIF)	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6；283 K；Ammonium Sulfate, MES, pH 6.0, VAPOR DIFFUSION, SITTING DROP, temperature 283.0K	Resolution 2.10 Å R-free 0.259
1KNE Chromo domain of HP1 complexed with histone H3 tail containing trimethyllysine 9 Deposited 2001-12-18	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain P 1–16（16 aa） Fragment：Residues 1-16	Mutation：P16Y Non-standard monomer：Yes (specific site not provided by mmCIF)	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.1；283 K；Ammonium Sulfate, MES, pH 6.1, VAPOR DIFFUSION, SITTING DROP, temperature 283K	Resolution 2.40 Å R-free 0.267
2PYO Drosophila nucleosome core Deposited 2007-05-16	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: decameric	Chain A 2–136（135 aa） Chain E 2–136（135 aa）	Not recorded	MN MANGANESE (II) ION × 14 CL CHLORIDE ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6；277 K；Crystallization was carried out by equilibrating a droplet containing 3 mg/ml nucleosome core particle, 80-85 mM MnCl2, 50-80 mM KCl and 20 mM potassium cacodylate (pH 6.0) against a reservoir solution containing of 40-42.5 mM MnCl2, 25-40 mM KCl and 20 mM potassium cacodylate (pH 6.0). , VAPOR DIFFUSION, HANGING DROP, temperature 277K	Resolution 2.43 Å R-free 0.262
2YBA Crystal structure of Nurf55 in complex with histone H3 Deposited 2011-03-02	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain D 2–20（19 aa） Fragment：N-TERMINAL TAIL, RESIDUES 2-19	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions 100 MM SODIUM CITRATE, PH 5.4; 200 MM AMMONIUM ACETATE; 23% PEG 3350.	Resolution 2.55 Å R-free 0.222
2YBA Crystal structure of Nurf55 in complex with histone H3 Deposited 2011-03-02	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain C 2–20（19 aa） Fragment：N-TERMINAL TAIL, RESIDUES 2-19	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions 100 MM SODIUM CITRATE, PH 5.4; 200 MM AMMONIUM ACETATE; 23% PEG 3350.	Resolution 2.55 Å R-free 0.222
4QLC Crystal structure of chromatosome at 3.5 angstrom resolution Deposited 2014-06-11	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: undecameric	Chain A 2–136（135 aa） Chain E 2–136（135 aa）	Not recorded	CIT CITRIC ACID × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 3.75；291 K；0.1 mM Citric acid, 0.1mM potassium chloride, and 10% MPD, pH 3.75, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 3.50 Å R-free 0.243
4U68 Crystal structure of Rhino chromodomain in complex with H3K9me3 Deposited 2014-07-28	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain D 5–15（11 aa）	Non-standard monomer：Yes (specific site not provided by mmCIF)	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.5；290 K；30 %(v/v) 2-methyl-2,4-pentanediol, 0.1 M sodium acetate, 25 % (w/v) PEG 1500	Resolution 1.80 Å R-free 0.206
4U68 Crystal structure of Rhino chromodomain in complex with H3K9me3 Deposited 2014-07-28	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain E 5–15（11 aa） Chain F 5–15（11 aa）	Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF)	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.5；290 K；30 %(v/v) 2-methyl-2,4-pentanediol, 0.1 M sodium acetate, 25 % (w/v) PEG 1500	Resolution 1.80 Å R-free 0.206
4UUZ MCM2-histone complex Deposited 2014-08-01	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 1–136（136 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；293 K；0.1M HEPES PH7, 21% PEG3000	Resolution 2.90 Å R-free 0.230
4X23 CRYSTAL STRUCTURE OF CENP-C IN COMPLEX WITH THE NUCLEOSOME CORE PARTICLE Deposited 2014-11-25	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 10 PDB declaration: dodecameric	Chain A 41–133（93 aa） Fragment：UNP RESIDUES 41-133 Chain E 41–133（93 aa） Fragment：UNP RESIDUES 41-133	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；294 K；10% MPD, 40MM SODIUM CACODYLATE, 24MM SPERMINE TETRA-HCL, 80MM SODIUM CHLORIDE, 20MM MAGNESIUM CHLORIDE; RESERVIOR 35% MPD. PH 7.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 294K	Resolution 3.50 Å R-free 0.286
4X23 CRYSTAL STRUCTURE OF CENP-C IN COMPLEX WITH THE NUCLEOSOME CORE PARTICLE Deposited 2014-11-25	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein–DNA Heteromer；Protein × 10 PDB declaration: dodecameric	Chain K 41–133（93 aa） Fragment：UNP RESIDUES 41-133 Chain O 41–133（93 aa） Fragment：UNP RESIDUES 41-133	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；294 K；10% MPD, 40MM SODIUM CACODYLATE, 24MM SPERMINE TETRA-HCL, 80MM SODIUM CHLORIDE, 20MM MAGNESIUM CHLORIDE; RESERVIOR 35% MPD. PH 7.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 294K	Resolution 3.50 Å R-free 0.286
5WCU Crystal structure of 167 bp nucleosome bound to the globular domain of linker histone H5 Deposited 2017-07-02	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: undecameric	Chain A 39–136（98 aa） Fragment：UNP residues 39-136 Chain E 39–136（98 aa） Fragment：UNP residues 39-136	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4；291 K；0.1 M NH4NO3, 10% MPD (v/v)	Resolution 5.53 Å R-free 0.238
5WCU Crystal structure of 167 bp nucleosome bound to the globular domain of linker histone H5 Deposited 2017-07-02	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein–DNA Heteromer；Protein × 9 PDB declaration: undecameric	Chain K 39–136（98 aa） Fragment：UNP residues 39-136 Chain O 39–136（98 aa） Fragment：UNP residues 39-136	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4；291 K；0.1 M NH4NO3, 10% MPD (v/v)	Resolution 5.53 Å R-free 0.238
6DZT Cryo-EM structure of nucleosome in complex with a single chain antibody fragment Deposited 2018-07-05	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 10 PDB declaration: dodecameric	Chain A 1–136（136 aa） Chain E 1–136（136 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.99 Å
6PWE Cryo-EM structure of nucleosome core particle Deposited 2019-07-22	Different construct Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: decameric	Chain A 1–136（136 aa） Chain E 1–136（136 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.95 Å
6PWF Cryo-EM structure of the ATPase domain of chromatin remodeling factor ISWI bound to the nucleosome Deposited 2019-07-22	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: undecameric	Chain A 1–136（136 aa） Chain E 1–136（136 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 4.07 Å
7VRF Crystal structure of Oxpecker chromodomain in complex with H3K9me3 Deposited 2021-10-22	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain C 5–15（11 aa） Chain D 5–15（11 aa）	Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF)	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；290 K；0.2M ammonium citrate, 20% (w/v) PEG 3350	Resolution 1.70 Å R-free 0.238
7XYF Cryo-EM structure of Fft3-nucleosome complex with Fft3 bound to SHL+2 position of the nucleosome Deposited 2022-06-01	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: 11-meric	Chain A 39–136（98 aa） Chain E 39–136（98 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.80 Å
7XYG Cryo-EM structure of Fft3-nucleosome complex with Fft3 bound to SHL+3 position of the nucleosome Deposited 2022-06-01	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: 11-meric	Chain A 2–136（135 aa） Chain E 2–136（135 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 4.20 Å
9B1E Cryo-EM structure of native SWR1 bound to nucleosome (composite structure) Deposited 2024-03-13	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 19 PDB declaration: 21-meric	Chain U 1–136（136 aa） Chain W 1–136（136 aa）	Not recorded	ADP ADENOSINE-5'-DIPHOSPHATE × 8 BEF BERYLLIUM TRIFLUORIDE ION × 2 MG MAGNESIUM ION × 8 ZN ZINC ION × 2	ELECTRON MICROSCOPY cryo-EM buffer pH 7.6；80 nM SWR1, 160 nM nucleosomes, 1 mM ADP, 10 mM NaF, 8 mM BeCl2, 0.05% glutaraldehyde, 20 mM HEPES-KOH pH 7.6, 1.5 mM MgCl2, 0.25 mM TCEP, 0.01% IGEPAL CA-630, 1% glycerol cryo-EM vitrification conditions Cryogen ETHANE；3 second blot time and blot force of 10.	Resolution 4.40 Å
9MU4 Structure of a native Drosophila melanogaster octameric nucleosome Deposited 2025-01-13	Different construct Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: decameric	Chain a 37–136（100 aa） Chain e 37–136（100 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5；10 mM HEPES-HCl (pH = 7.5), 150 mM NaCl, 5% glycerol, 1 mM EDTA, 350 ug/mL 3x FLAG peptide, 1/1000th protease inhibitor cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.29 Å
9MU5 Structure of a native Drosophila melanogaster hexameric nucleosome Deposited 2025-01-13	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 6 PDB declaration: octameric	Chain a 45–136（92 aa） Chain e 45–136（92 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5；10 mM HEPES-HCl (pH = 7.5), 150 mM NaCl, 5% glycerol, 1 mM EDTA, 350 ug/mL 3x FLAG peptide, 1/1000th protease inhibitor cryo-EM vitrification conditions Cryogen ETHANE	Resolution 6.30 Å
9MU9 Structure of a native Drosophila melanogaster Nucleosome Elongation Complex (Pol II EC-nucleosome). Composite map Deposited 2025-01-13	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 18 PDB declaration: 21-meric	Chain a 37–136（100 aa） Chain e 37–136（100 aa）	Not recorded	ZN ZINC ION × 8	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5；10 mM HEPES-HCl (pH = 7.5), 150 mM NaCl, 5% glycerol, 1 mM EDTA, 350 ug/mL 3x FLAG peptide, 1/1000th protease inhibitor cryo-EM vitrification conditions Cryogen ETHANE	Resolution 7.80 Å
9ZQ9 Nucleosome with an SSB at SHL -2.8 in complex with the WGR domain of human PARP2, Class 1 Deposited 2025-12-18	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric	Chain E 1–136（136 aa） Chain F 1–136（136 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.30 Å
9ZQA Nucleosome with an SSB at SHL -2.8 in complex with the WGR domain of human PARP2, Class 2 Deposited 2025-12-18	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric	Chain E 1–136（136 aa） Chain F 1–136（136 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.28 Å
9ZQB Nucleosome with an SSB at SHL -2.8 in complex with human PARP2 and HPF1, Class 1 Deposited 2025-12-18	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric	Chain E 1–136（136 aa） Chain F 1–136（136 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.10 Å
9ZQC Nucleosome with an SSB at SHL -2.8 in complex with human PARP2 and HPF1, Class 2 Deposited 2025-12-18	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric	Chain E 1–136（136 aa） Chain F 1–136（136 aa）	Mutation：C111S Mutation：C111S	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.37 Å

23 other PDB entries and 27 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	H3_DROME
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain A； PDBConstruct 1–135； UniProt 1–135 Author chain E； PDBConstruct 1–135； UniProt 1–135

Histone H4

Drosophila melanogaster

UniProt P84040

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Protein–DNA Heteromer Protein × 8 DNA 2 PDB declaration: decameric（10） Consistent with all polymer counts	Chain B； UniProt 1–102 Chain F； UniProt 1–102	Not recorded	alpha-satellite DNA × 2 Histone H3 × 2 （P02299） Histone H2A × 2 （P84051） Histone H2B × 2 （P02283）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, SITTING DROP；pH 6；292 K；Constituents of the crystallization buffer: Potassium Chloride, Manganese Chloride, and Potassium Cacodylate., pH 6.0, VAPOR DIFFUSION, SITTING DROP, temperature 292K	Resolution 2.30 Å R-free 0.254

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB	Difference from Current Entry 2NQB	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
2PYO Drosophila nucleosome core Deposited 2007-05-16	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: decameric	Chain B 2–103（102 aa） Chain F 2–103（102 aa）	Not recorded	MN MANGANESE (II) ION × 14 CL CHLORIDE ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6；277 K；Crystallization was carried out by equilibrating a droplet containing 3 mg/ml nucleosome core particle, 80-85 mM MnCl2, 50-80 mM KCl and 20 mM potassium cacodylate (pH 6.0) against a reservoir solution containing of 40-42.5 mM MnCl2, 25-40 mM KCl and 20 mM potassium cacodylate (pH 6.0). , VAPOR DIFFUSION, HANGING DROP, temperature 277K	Resolution 2.43 Å R-free 0.262
2XYI Crystal Structure of Nurf55 in complex with a H4 peptide Deposited 2010-11-17	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 27–46（20 aa） Fragment：RESIDUES 27-46	Not recorded	PG4 TETRAETHYLENE GLYCOL × 3 PEG DI(HYDROXYETHYL)ETHER × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6；35%(V/V) PEG 400, 100MM MES PH 6	Resolution 1.75 Å R-free 0.195
3C9C Structural Basis of Histone H4 Recognition by p55 Deposited 2008-02-15	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 16–42（27 aa） Fragment：UNP residues 16-42	Not recorded	CD CADMIUM ION × 7	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；293 K；Ammonium Sulfate, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 3.20 Å R-free 0.242
4QLC Crystal structure of chromatosome at 3.5 angstrom resolution Deposited 2014-06-11	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: undecameric	Chain B 2–103（102 aa） Chain F 2–103（102 aa）	Not recorded	CIT CITRIC ACID × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 3.75；291 K；0.1 mM Citric acid, 0.1mM potassium chloride, and 10% MPD, pH 3.75, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 3.50 Å R-free 0.243
4UUZ MCM2-histone complex Deposited 2014-08-01	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain B 1–103（103 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；293 K；0.1M HEPES PH7, 21% PEG3000	Resolution 2.90 Å R-free 0.230
4X23 CRYSTAL STRUCTURE OF CENP-C IN COMPLEX WITH THE NUCLEOSOME CORE PARTICLE Deposited 2014-11-25	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 10 PDB declaration: dodecameric	Chain B 25–103（79 aa） Fragment：UNP RESIDUES 25-103 Chain F 25–103（79 aa） Fragment：UNP RESIDUES 25-103	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；294 K；10% MPD, 40MM SODIUM CACODYLATE, 24MM SPERMINE TETRA-HCL, 80MM SODIUM CHLORIDE, 20MM MAGNESIUM CHLORIDE; RESERVIOR 35% MPD. PH 7.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 294K	Resolution 3.50 Å R-free 0.286
4X23 CRYSTAL STRUCTURE OF CENP-C IN COMPLEX WITH THE NUCLEOSOME CORE PARTICLE Deposited 2014-11-25	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein–DNA Heteromer；Protein × 10 PDB declaration: dodecameric	Chain L 25–103（79 aa） Fragment：UNP RESIDUES 25-103 Chain P 25–103（79 aa） Fragment：UNP RESIDUES 25-103	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；294 K；10% MPD, 40MM SODIUM CACODYLATE, 24MM SPERMINE TETRA-HCL, 80MM SODIUM CHLORIDE, 20MM MAGNESIUM CHLORIDE; RESERVIOR 35% MPD. PH 7.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 294K	Resolution 3.50 Å R-free 0.286
5WCU Crystal structure of 167 bp nucleosome bound to the globular domain of linker histone H5 Deposited 2017-07-02	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: undecameric	Chain B 22–103（82 aa） Fragment：UNP residues 22-103 Chain F 22–103（82 aa） Fragment：UNP residues 22-103	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4；291 K；0.1 M NH4NO3, 10% MPD (v/v)	Resolution 5.53 Å R-free 0.238
5WCU Crystal structure of 167 bp nucleosome bound to the globular domain of linker histone H5 Deposited 2017-07-02	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein–DNA Heteromer；Protein × 9 PDB declaration: undecameric	Chain L 22–103（82 aa） Fragment：UNP residues 22-103 Chain P 22–103（82 aa） Fragment：UNP residues 22-103	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4；291 K；0.1 M NH4NO3, 10% MPD (v/v)	Resolution 5.53 Å R-free 0.238
6DZT Cryo-EM structure of nucleosome in complex with a single chain antibody fragment Deposited 2018-07-05	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 10 PDB declaration: dodecameric	Chain B 2–103（102 aa） Chain F 2–103（102 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.99 Å
7XYF Cryo-EM structure of Fft3-nucleosome complex with Fft3 bound to SHL+2 position of the nucleosome Deposited 2022-06-01	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: 11-meric	Chain B 18–103（86 aa） Chain F 18–103（86 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.80 Å
7XYG Cryo-EM structure of Fft3-nucleosome complex with Fft3 bound to SHL+3 position of the nucleosome Deposited 2022-06-01	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: 11-meric	Chain B 1–103（103 aa） Chain F 1–103（103 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 4.20 Å
8UX1 Cryo-EM structure of Ran bound to RCC1 and the nucleosome core particle Deposited 2023-11-08	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 10 PDB declaration: dodecameric	Chain B 2–103（102 aa） Chain F 2–103（102 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.50 Å
9MU4 Structure of a native Drosophila melanogaster octameric nucleosome Deposited 2025-01-13	Different construct Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: decameric	Chain b 22–103（82 aa） Chain f 22–103（82 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5；10 mM HEPES-HCl (pH = 7.5), 150 mM NaCl, 5% glycerol, 1 mM EDTA, 350 ug/mL 3x FLAG peptide, 1/1000th protease inhibitor cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.29 Å
9MU5 Structure of a native Drosophila melanogaster hexameric nucleosome Deposited 2025-01-13	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 6 PDB declaration: octameric	Chain b 24–103（80 aa） Chain f 24–103（80 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5；10 mM HEPES-HCl (pH = 7.5), 150 mM NaCl, 5% glycerol, 1 mM EDTA, 350 ug/mL 3x FLAG peptide, 1/1000th protease inhibitor cryo-EM vitrification conditions Cryogen ETHANE	Resolution 6.30 Å
9MU9 Structure of a native Drosophila melanogaster Nucleosome Elongation Complex (Pol II EC-nucleosome). Composite map Deposited 2025-01-13	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 18 PDB declaration: 21-meric	Chain b 24–103（80 aa） Chain f 24–103（80 aa）	Not recorded	ZN ZINC ION × 8	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5；10 mM HEPES-HCl (pH = 7.5), 150 mM NaCl, 5% glycerol, 1 mM EDTA, 350 ug/mL 3x FLAG peptide, 1/1000th protease inhibitor cryo-EM vitrification conditions Cryogen ETHANE	Resolution 7.80 Å
9ZQ9 Nucleosome with an SSB at SHL -2.8 in complex with the WGR domain of human PARP2, Class 1 Deposited 2025-12-18	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric	Chain G 2–103（102 aa） Chain H 2–103（102 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.30 Å
9ZQA Nucleosome with an SSB at SHL -2.8 in complex with the WGR domain of human PARP2, Class 2 Deposited 2025-12-18	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric	Chain G 1–103（103 aa） Chain H 1–103（103 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.28 Å
9ZQB Nucleosome with an SSB at SHL -2.8 in complex with human PARP2 and HPF1, Class 1 Deposited 2025-12-18	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric	Chain G 1–103（103 aa） Chain H 1–103（103 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.10 Å
9ZQC Nucleosome with an SSB at SHL -2.8 in complex with human PARP2 and HPF1, Class 2 Deposited 2025-12-18	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric	Chain G 1–103（103 aa） Chain H 1–103（103 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.37 Å

18 other PDB entries and 20 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	H4_DROME
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain B； PDBConstruct 2–103； UniProt 1–102 Author chain F； PDBConstruct 2–103； UniProt 1–102

Histone H2A

Drosophila melanogaster

UniProt P84051

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Protein–DNA Heteromer Protein × 8 DNA 2 PDB declaration: decameric（10） Consistent with all polymer counts	Chain C； UniProt 1–123 Chain G； UniProt 1–123	Not recorded	alpha-satellite DNA × 2 Histone H3 × 2 （P02299） Histone H4 × 2 （P84040） Histone H2B × 2 （P02283）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, SITTING DROP；pH 6；292 K；Constituents of the crystallization buffer: Potassium Chloride, Manganese Chloride, and Potassium Cacodylate., pH 6.0, VAPOR DIFFUSION, SITTING DROP, temperature 292K	Resolution 2.30 Å R-free 0.254

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB	Difference from Current Entry 2NQB	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
2PYO Drosophila nucleosome core Deposited 2007-05-16	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: decameric	Chain C 2–121（120 aa） Chain G 2–121（120 aa）	Not recorded	MN MANGANESE (II) ION × 14 CL CHLORIDE ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6；277 K；Crystallization was carried out by equilibrating a droplet containing 3 mg/ml nucleosome core particle, 80-85 mM MnCl2, 50-80 mM KCl and 20 mM potassium cacodylate (pH 6.0) against a reservoir solution containing of 40-42.5 mM MnCl2, 25-40 mM KCl and 20 mM potassium cacodylate (pH 6.0). , VAPOR DIFFUSION, HANGING DROP, temperature 277K	Resolution 2.43 Å R-free 0.262
4QLC Crystal structure of chromatosome at 3.5 angstrom resolution Deposited 2014-06-11	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: undecameric	Chain C 2–124（123 aa） Chain G 2–124（123 aa）	Not recorded	CIT CITRIC ACID × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 3.75；291 K；0.1 mM Citric acid, 0.1mM potassium chloride, and 10% MPD, pH 3.75, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 3.50 Å R-free 0.243
4X23 CRYSTAL STRUCTURE OF CENP-C IN COMPLEX WITH THE NUCLEOSOME CORE PARTICLE Deposited 2014-11-25	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 10 PDB declaration: dodecameric	Chain C 16–117（102 aa） Fragment：UNP RESIDUES 16-117 Chain G 16–117（102 aa） Fragment：UNP RESIDUES 16-117	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；294 K；10% MPD, 40MM SODIUM CACODYLATE, 24MM SPERMINE TETRA-HCL, 80MM SODIUM CHLORIDE, 20MM MAGNESIUM CHLORIDE; RESERVIOR 35% MPD. PH 7.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 294K	Resolution 3.50 Å R-free 0.286
4X23 CRYSTAL STRUCTURE OF CENP-C IN COMPLEX WITH THE NUCLEOSOME CORE PARTICLE Deposited 2014-11-25	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein–DNA Heteromer；Protein × 10 PDB declaration: dodecameric	Chain M 16–117（102 aa） Fragment：UNP RESIDUES 16-117 Chain Q 16–117（102 aa） Fragment：UNP RESIDUES 16-117	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；294 K；10% MPD, 40MM SODIUM CACODYLATE, 24MM SPERMINE TETRA-HCL, 80MM SODIUM CHLORIDE, 20MM MAGNESIUM CHLORIDE; RESERVIOR 35% MPD. PH 7.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 294K	Resolution 3.50 Å R-free 0.286
5WCU Crystal structure of 167 bp nucleosome bound to the globular domain of linker histone H5 Deposited 2017-07-02	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: undecameric	Chain C 15–118（104 aa） Fragment：UNP residues 15-118 Chain G 15–118（104 aa） Fragment：UNP residues 15-118	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4；291 K；0.1 M NH4NO3, 10% MPD (v/v)	Resolution 5.53 Å R-free 0.238
5WCU Crystal structure of 167 bp nucleosome bound to the globular domain of linker histone H5 Deposited 2017-07-02	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein–DNA Heteromer；Protein × 9 PDB declaration: undecameric	Chain M 15–118（104 aa） Fragment：UNP residues 15-118 Chain Q 15–118（104 aa） Fragment：UNP residues 15-118	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4；291 K；0.1 M NH4NO3, 10% MPD (v/v)	Resolution 5.53 Å R-free 0.238
6DZT Cryo-EM structure of nucleosome in complex with a single chain antibody fragment Deposited 2018-07-05	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 10 PDB declaration: dodecameric	Chain C 1–124（124 aa） Chain G 1–124（124 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.99 Å
6PWE Cryo-EM structure of nucleosome core particle Deposited 2019-07-22	Different construct Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: decameric	Chain C 1–124（124 aa） Chain G 1–124（124 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.95 Å
6PWF Cryo-EM structure of the ATPase domain of chromatin remodeling factor ISWI bound to the nucleosome Deposited 2019-07-22	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: undecameric	Chain C 1–124（124 aa） Chain G 1–124（124 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 4.07 Å
7PJ1 Solution structure of isolated Drosophila histone H2A-H2B heterodimer Deposited 2021-08-23	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 2–124（123 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR NMR measurement conditions pH 6.5；303 K；Ionic strength (raw mmCIF value) 300；Pressure 1 NMR sample composition 0.5 mM histone H2A, 0.5 mM [U-15N; U-2H] histone H2B, 90% H2O/10% D2O \| 90% H2O/10% D2O	Resolution not provided
7XYF Cryo-EM structure of Fft3-nucleosome complex with Fft3 bound to SHL+2 position of the nucleosome Deposited 2022-06-01	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: 11-meric	Chain C 14–119（106 aa） Chain G 14–119（106 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.80 Å
7XYG Cryo-EM structure of Fft3-nucleosome complex with Fft3 bound to SHL+3 position of the nucleosome Deposited 2022-06-01	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: 11-meric	Chain C 2–124（123 aa） Chain G 2–124（123 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 4.20 Å
8PP6 human RYBP-PRC1 bound to H2AK118ub1 nucleosome Deposited 2023-07-06	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 10 PDB declaration: 12-meric	Chain C 2–124（123 aa） Chain G 2–124（123 aa）	Not recorded	ZN ZINC ION × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.18 Å
8PP7 human RYBP-PRC1 bound to mononucleosome Deposited 2023-07-06	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 12 PDB declaration: 14-meric	Chain C 2–124（123 aa） Chain G 2–124（123 aa）	Not recorded	ZN ZINC ION × 8	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.91 Å
8UX1 Cryo-EM structure of Ran bound to RCC1 and the nucleosome core particle Deposited 2023-11-08	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 10 PDB declaration: dodecameric	Chain C 1–124（124 aa） Chain G 1–124（124 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.50 Å
9MU4 Structure of a native Drosophila melanogaster octameric nucleosome Deposited 2025-01-13	Different construct Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: decameric	Chain c 14–119（106 aa） Chain g 14–119（106 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5；10 mM HEPES-HCl (pH = 7.5), 150 mM NaCl, 5% glycerol, 1 mM EDTA, 350 ug/mL 3x FLAG peptide, 1/1000th protease inhibitor cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.29 Å
9MU5 Structure of a native Drosophila melanogaster hexameric nucleosome Deposited 2025-01-13	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 6 PDB declaration: octameric	Chain g 14–118（105 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5；10 mM HEPES-HCl (pH = 7.5), 150 mM NaCl, 5% glycerol, 1 mM EDTA, 350 ug/mL 3x FLAG peptide, 1/1000th protease inhibitor cryo-EM vitrification conditions Cryogen ETHANE	Resolution 6.30 Å
9MU9 Structure of a native Drosophila melanogaster Nucleosome Elongation Complex (Pol II EC-nucleosome). Composite map Deposited 2025-01-13	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 18 PDB declaration: 21-meric	Chain c 14–119（106 aa） Chain g 14–119（106 aa）	Not recorded	ZN ZINC ION × 8	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5；10 mM HEPES-HCl (pH = 7.5), 150 mM NaCl, 5% glycerol, 1 mM EDTA, 350 ug/mL 3x FLAG peptide, 1/1000th protease inhibitor cryo-EM vitrification conditions Cryogen ETHANE	Resolution 7.80 Å
9ZQ9 Nucleosome with an SSB at SHL -2.8 in complex with the WGR domain of human PARP2, Class 1 Deposited 2025-12-18	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric	Chain A 1–124（124 aa） Chain B 1–124（124 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.30 Å
9ZQA Nucleosome with an SSB at SHL -2.8 in complex with the WGR domain of human PARP2, Class 2 Deposited 2025-12-18	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric	Chain A 1–124（124 aa） Chain B 1–124（124 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.28 Å
9ZQB Nucleosome with an SSB at SHL -2.8 in complex with human PARP2 and HPF1, Class 1 Deposited 2025-12-18	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric	Chain A 1–124（124 aa） Chain B 1–124（124 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.10 Å
9ZQC Nucleosome with an SSB at SHL -2.8 in complex with human PARP2 and HPF1, Class 2 Deposited 2025-12-18	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric	Chain A 1–124（124 aa） Chain B 1–124（124 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.37 Å

20 other PDB entries and 22 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	H2A_DROME
Isoform	—
PDB entities	4
Chains and sequence ranges	Author chain C； PDBConstruct 1–123； UniProt 1–123 Author chain G； PDBConstruct 1–123； UniProt 1–123

Histone H2B

Drosophila melanogaster

UniProt P02283

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Protein–DNA Heteromer Protein × 8 DNA 2 PDB declaration: decameric（10） Consistent with all polymer counts	Chain D； UniProt 1–123 Chain H； UniProt 1–123	Not recorded	alpha-satellite DNA × 2 Histone H3 × 2 （P02299） Histone H4 × 2 （P84040） Histone H2A × 2 （P84051）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, SITTING DROP；pH 6；292 K；Constituents of the crystallization buffer: Potassium Chloride, Manganese Chloride, and Potassium Cacodylate., pH 6.0, VAPOR DIFFUSION, SITTING DROP, temperature 292K	Resolution 2.30 Å R-free 0.254

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB	Difference from Current Entry 2NQB	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
2PYO Drosophila nucleosome core Deposited 2007-05-16	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: decameric	Chain D 2–123（122 aa） Chain H 2–123（122 aa）	Not recorded	MN MANGANESE (II) ION × 14 CL CHLORIDE ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6；277 K；Crystallization was carried out by equilibrating a droplet containing 3 mg/ml nucleosome core particle, 80-85 mM MnCl2, 50-80 mM KCl and 20 mM potassium cacodylate (pH 6.0) against a reservoir solution containing of 40-42.5 mM MnCl2, 25-40 mM KCl and 20 mM potassium cacodylate (pH 6.0). , VAPOR DIFFUSION, HANGING DROP, temperature 277K	Resolution 2.43 Å R-free 0.262
4QLC Crystal structure of chromatosome at 3.5 angstrom resolution Deposited 2014-06-11	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: undecameric	Chain D 2–123（122 aa） Chain H 2–123（122 aa）	Not recorded	CIT CITRIC ACID × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 3.75；291 K；0.1 mM Citric acid, 0.1mM potassium chloride, and 10% MPD, pH 3.75, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 3.50 Å R-free 0.243
4X23 CRYSTAL STRUCTURE OF CENP-C IN COMPLEX WITH THE NUCLEOSOME CORE PARTICLE Deposited 2014-11-25	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 10 PDB declaration: dodecameric	Chain D 33–122（90 aa） Fragment：UNP RESIDUES 33-122 Chain H 33–122（90 aa） Fragment：UNP RESIDUES 33-122	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；294 K；10% MPD, 40MM SODIUM CACODYLATE, 24MM SPERMINE TETRA-HCL, 80MM SODIUM CHLORIDE, 20MM MAGNESIUM CHLORIDE; RESERVIOR 35% MPD. PH 7.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 294K	Resolution 3.50 Å R-free 0.286
4X23 CRYSTAL STRUCTURE OF CENP-C IN COMPLEX WITH THE NUCLEOSOME CORE PARTICLE Deposited 2014-11-25	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein–DNA Heteromer；Protein × 10 PDB declaration: dodecameric	Chain N 33–122（90 aa） Fragment：UNP RESIDUES 33-122 Chain R 33–122（90 aa） Fragment：UNP RESIDUES 33-122	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；294 K；10% MPD, 40MM SODIUM CACODYLATE, 24MM SPERMINE TETRA-HCL, 80MM SODIUM CHLORIDE, 20MM MAGNESIUM CHLORIDE; RESERVIOR 35% MPD. PH 7.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 294K	Resolution 3.50 Å R-free 0.286
5CVE Crystal Structure of human NRMT1 in complex with dimethylated fly H2B peptide and SAH Deposited 2015-07-26	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain D 2–10（9 aa） Fragment：UNP residues 2-10	Non-standard monomer：Yes (specific site not provided by mmCIF)	SAH S-ADENOSYL-L-HOMOCYSTEINE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.7；291 K；0.2 M (NH4)Ac, 0.1 M Sodium citrate tribasic dihydrate, 24%(w/v) PEG 4000	Resolution 1.50 Å R-free 0.179
5CVE Crystal Structure of human NRMT1 in complex with dimethylated fly H2B peptide and SAH Deposited 2015-07-26	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain E 2–10（9 aa） Fragment：UNP residues 2-10	Non-standard monomer：Yes (specific site not provided by mmCIF)	SAH S-ADENOSYL-L-HOMOCYSTEINE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.7；291 K；0.2 M (NH4)Ac, 0.1 M Sodium citrate tribasic dihydrate, 24%(w/v) PEG 4000	Resolution 1.50 Å R-free 0.179
5WCU Crystal structure of 167 bp nucleosome bound to the globular domain of linker histone H5 Deposited 2017-07-02	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: undecameric	Chain D 29–122（94 aa） Fragment：UNP residues 29-122 Chain H 29–122（94 aa） Fragment：UNP residues 29-122	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4；291 K；0.1 M NH4NO3, 10% MPD (v/v)	Resolution 5.53 Å R-free 0.238
5WCU Crystal structure of 167 bp nucleosome bound to the globular domain of linker histone H5 Deposited 2017-07-02	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein–DNA Heteromer；Protein × 9 PDB declaration: undecameric	Chain N 29–122（94 aa） Fragment：UNP residues 29-122 Chain R 29–122（94 aa） Fragment：UNP residues 29-122	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4；291 K；0.1 M NH4NO3, 10% MPD (v/v)	Resolution 5.53 Å R-free 0.238
6DZT Cryo-EM structure of nucleosome in complex with a single chain antibody fragment Deposited 2018-07-05	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 10 PDB declaration: dodecameric	Chain D 2–123（122 aa） Chain H 2–123（122 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.99 Å
6PWE Cryo-EM structure of nucleosome core particle Deposited 2019-07-22	Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: decameric	Chain D 1–123（123 aa） Chain H 1–123（123 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.95 Å
6PWF Cryo-EM structure of the ATPase domain of chromatin remodeling factor ISWI bound to the nucleosome Deposited 2019-07-22	Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: undecameric	Chain D 1–123（123 aa） Chain H 1–123（123 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 4.07 Å
7PJ1 Solution structure of isolated Drosophila histone H2A-H2B heterodimer Deposited 2021-08-23	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 2–123（122 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR NMR measurement conditions pH 6.5；303 K；Ionic strength (raw mmCIF value) 300；Pressure 1 NMR sample composition 0.5 mM histone H2A, 0.5 mM [U-15N; U-2H] histone H2B, 90% H2O/10% D2O \| 90% H2O/10% D2O	Resolution not provided
7XYF Cryo-EM structure of Fft3-nucleosome complex with Fft3 bound to SHL+2 position of the nucleosome Deposited 2022-06-01	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: 11-meric	Chain D 29–123（95 aa） Chain H 29–123（95 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.80 Å
7XYG Cryo-EM structure of Fft3-nucleosome complex with Fft3 bound to SHL+3 position of the nucleosome Deposited 2022-06-01	Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: 11-meric	Chain D 1–123（123 aa） Chain H 1–123（123 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 4.20 Å
8PP6 human RYBP-PRC1 bound to H2AK118ub1 nucleosome Deposited 2023-07-06	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 10 PDB declaration: 12-meric	Chain D 2–123（122 aa） Chain H 2–123（122 aa）	Not recorded	ZN ZINC ION × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.18 Å
8PP7 human RYBP-PRC1 bound to mononucleosome Deposited 2023-07-06	Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 12 PDB declaration: 14-meric	Chain D 1–123（123 aa） Chain H 1–123（123 aa）	Not recorded	ZN ZINC ION × 8	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.91 Å
8UX1 Cryo-EM structure of Ran bound to RCC1 and the nucleosome core particle Deposited 2023-11-08	Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 10 PDB declaration: dodecameric	Chain D 1–123（123 aa） Chain H 1–123（123 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.50 Å
9MU4 Structure of a native Drosophila melanogaster octameric nucleosome Deposited 2025-01-13	Different construct Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 8 PDB declaration: decameric	Chain d 27–123（97 aa） Chain h 27–123（97 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5；10 mM HEPES-HCl (pH = 7.5), 150 mM NaCl, 5% glycerol, 1 mM EDTA, 350 ug/mL 3x FLAG peptide, 1/1000th protease inhibitor cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.29 Å
9MU5 Structure of a native Drosophila melanogaster hexameric nucleosome Deposited 2025-01-13	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 6 PDB declaration: octameric	Chain h 27–123（97 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5；10 mM HEPES-HCl (pH = 7.5), 150 mM NaCl, 5% glycerol, 1 mM EDTA, 350 ug/mL 3x FLAG peptide, 1/1000th protease inhibitor cryo-EM vitrification conditions Cryogen ETHANE	Resolution 6.30 Å
9MU9 Structure of a native Drosophila melanogaster Nucleosome Elongation Complex (Pol II EC-nucleosome). Composite map Deposited 2025-01-13	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 18 PDB declaration: 21-meric	Chain d 27–123（97 aa） Chain h 27–123（97 aa）	Not recorded	ZN ZINC ION × 8	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5；10 mM HEPES-HCl (pH = 7.5), 150 mM NaCl, 5% glycerol, 1 mM EDTA, 350 ug/mL 3x FLAG peptide, 1/1000th protease inhibitor cryo-EM vitrification conditions Cryogen ETHANE	Resolution 7.80 Å
9ZQ9 Nucleosome with an SSB at SHL -2.8 in complex with the WGR domain of human PARP2, Class 1 Deposited 2025-12-18	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric	Chain C 2–123（122 aa） Chain D 2–123（122 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.30 Å
9ZQA Nucleosome with an SSB at SHL -2.8 in complex with the WGR domain of human PARP2, Class 2 Deposited 2025-12-18	Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric	Chain C 1–123（123 aa） Chain D 1–123（123 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.28 Å
9ZQB Nucleosome with an SSB at SHL -2.8 in complex with human PARP2 and HPF1, Class 1 Deposited 2025-12-18	Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric	Chain C 1–123（123 aa） Chain D 1–123（123 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.10 Å
9ZQC Nucleosome with an SSB at SHL -2.8 in complex with human PARP2 and HPF1, Class 2 Deposited 2025-12-18	Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Heteromer；Protein × 11 PDB declaration: 14-meric	Chain C 1–123（123 aa） Chain D 1–123（123 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.37 Å

21 other PDB entries and 24 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	H2B_DROME
Isoform	—
PDB entities	5
Chains and sequence ranges	Author chain D； PDBConstruct 1–123； UniProt 1–123 Author chain H； PDBConstruct 1–123； UniProt 1–123

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	2nqb
Deposition date deposition_date	2006-10-30
Structure title title	Drosophila Nucleosome Structure
Keywords keywords	Nucleosome, NCP, chromatin, histone, STRUCTURAL PROTEIN-DNA COMPLEX; STRUCTURAL PROTEIN/DNA
Experimental Method method	X-RAY DIFFRACTION

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3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier	39.97 Å
Radius of gyration Rg (electron density) rg_electron	37.22 Å
Forward intensity I(0) i0	829208000.00
Molecular weight molecular_weight	176330.0 kDa
Excluded volume excluded_volume	195880 Å³
Envelope volume envelope_volume	290310 Å³
Hydration-shell volume shell_volume	63108 Å³
Envelope diameter envelope_diameter	118.9 Å
Shell Rg shell_rg	45.09 Å
Envelope Rg envelope_rg	36.69 Å
Shape Rg shape_rg	37.06 Å
Total Rg total_rg	37.94 Å
Total atoms total_atoms	12030
Residues n_residues	1054
Spherical-harmonic order n_harmonics	20
q range q_range	— – 0.5000 Å⁻¹
Data points n_points	101
Shell type shell_type	directional
Solvent electron density solvent_density	0.3340 e/Å³
Shell contrast contrast_shell	0.0300 e/Å³
CRYSOL version crysol_version	4.1.3

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4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax	118.0 Å
Rg (real space) rg_real	39.69 Å
Rg uncertainty (real space) rg_real_error	0.95 Å
I(0) (real space) i0_real	8.2920e+08
I(0) uncertainty (real space) i0_real_error	1.5070e+07
Rg (reciprocal space) rg_reciprocal	39.87 Å
I(0) (reciprocal space) i0_reciprocal	829400000.0000
Solution quality estimate total_estimate	0.9031
Solution quality rating solution_quality	EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks	1
Primary peak position r_peak_primary	47.2 Å
Skewness Skewness skewness	0.082
Kurtosis Kurtosis kurtosis	-0.697
Angular range angular_range	— – 0.2000 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	67160000.0000
Real-space data points n_real_points	41
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.977; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.985; Smooth: 0.819

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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (6)

Entity 1 Entity 1 polymer

Description description	alpha-satellite DNA
Molecular weight formula_weight	45054.8 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polydeoxyribonucleotide
Chain IDs strand_id	I,J
Atom count atom_count	12294

ATCAATATCCACCTGCAGATTCTACCAAAAGTGTATTTGGAAACTGCTCCATCAAAAGGCATGTTCAGCGGAATTCCGCTGAACATGCCTTTTGATGGAGCAGTTTCCAAATACACTTTTGGTAGAATCTGCAGGTGGATATTGAT

来源 Source

来源生物 organism	Homo sapiens
通用名 common_name	human
NCBI Class编号 ncbi_taxonomy_id	9606
宿主生物 host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	Histone H3
Molecular weight formula_weight	15289.9 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,E

ARTKQTARKSTGGKAPRKQLATKAARKSAPATGGVKKPHRYRPGTVALREIRRYQKSTELLIRKLPFQRLVREIAQDFKTDLRFQSSAVMALQEASEAYLVGLFEDTNLCAIHAKRVTIMPKDIQLARRIRGERA

来源 Source

来源生物 organism	Drosophila melanogaster
通用名 common_name	fruit fly
NCBI Class编号 ncbi_taxonomy_id	7227
宿主生物 host_organism	Escherichia coli

Entity 3 Entity 3 polymer

Description description	Histone H4
Molecular weight formula_weight	11390.4 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B,F

ITGRGKGGKGLGKGGAKRHRKVLRDNIQGITKPAIRRLARRGGVKRISGLIYEETRGVLKVFLENVIRDAVTYTEHAKRKTVTAMDVVYALKRQGRTLYGFGG

来源 Source

来源生物 organism	Drosophila melanogaster
通用名 common_name	fruit fly
NCBI Class编号 ncbi_taxonomy_id	7227
宿主生物 host_organism	Escherichia coli

Entity 4 Entity 4 polymer

Description description	Histone H2A
Molecular weight formula_weight	13257.5 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C,G

SGRGKGGKVKGKAKSRSNRAGLQFPVGRIHRLLRKGNYAERVGAGAPVYLAAVMEYLAAEVLELAGNAARDNKKTRIIPRHLQLAIRNDEELNKLLSGVTIAQGGVLPNIQAVLLPKKTEKKA

来源 Source

来源生物 organism	Drosophila melanogaster
通用名 common_name	fruit fly
NCBI Class编号 ncbi_taxonomy_id	7227
宿主生物 host_organism	Escherichia coli

Entity 5 Entity 5 polymer

Description description	Histone H2B
Molecular weight formula_weight	13681.0 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D,H

IPPKTSGKAAKKAGKAQKNITKTDKKKKRKRKESYAIYIYTVLKQVHPDTGISSKAMSIMNSFVNDIFERIAAEASRLAHYNKRSTITSREIQTAVRLLLPGELAKHAVSEGTKAVTKYTSSK

来源 Source

来源生物 organism	Drosophila melanogaster
通用名 common_name	fruit fly
NCBI Class编号 ncbi_taxonomy_id	7227
宿主生物 host_organism	Escherichia coli

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	264

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7. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d2nqba_
Class class	a — All alpha proteins
Fold Fold fold	a.22 — Histone-fold
Superfamily Superfamily superfamily	a.22.1 — Histone-fold
Family Family family	a.22.1.1 — Nucleosome core histones

Domain ID domain_id	d2nqbb_
Class class	a — All alpha proteins
Fold Fold fold	a.22 — Histone-fold
Superfamily Superfamily superfamily	a.22.1 — Histone-fold
Family Family family	a.22.1.1 — Nucleosome core histones

Domain ID domain_id	d2nqbc_
Class class	a — All alpha proteins
Fold Fold fold	a.22 — Histone-fold
Superfamily Superfamily superfamily	a.22.1 — Histone-fold
Family Family family	a.22.1.1 — Nucleosome core histones

Domain ID domain_id	d2nqbd_
Class class	a — All alpha proteins
Fold Fold fold	a.22 — Histone-fold
Superfamily Superfamily superfamily	a.22.1 — Histone-fold
Family Family family	a.22.1.1 — Nucleosome core histones

Domain ID domain_id	d2nqbe_
Class class	a — All alpha proteins
Fold Fold fold	a.22 — Histone-fold
Superfamily Superfamily superfamily	a.22.1 — Histone-fold
Family Family family	a.22.1.1 — Nucleosome core histones

Domain ID domain_id	d2nqbf_
Class class	a — All alpha proteins
Fold Fold fold	a.22 — Histone-fold
Superfamily Superfamily superfamily	a.22.1 — Histone-fold
Family Family family	a.22.1.1 — Nucleosome core histones

Domain ID domain_id	d2nqbg_
Class class	a — All alpha proteins
Fold Fold fold	a.22 — Histone-fold
Superfamily Superfamily superfamily	a.22.1 — Histone-fold
Family Family family	a.22.1.1 — Nucleosome core histones

Domain ID domain_id	d2nqbh_
Class class	a — All alpha proteins
Fold Fold fold	a.22 — Histone-fold
Superfamily Superfamily superfamily	a.22.1 — Histone-fold
Family Family family	a.22.1.1 — Nucleosome core histones

CATH v4.4 (8 domains)

Domain ID domain_id	2nqbA00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	20 — Histone, subunit A
Homologous superfamily homologous superfamily	10 — Histone, subunit A

Domain ID domain_id	2nqbB00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	20 — Histone, subunit A
Homologous superfamily homologous superfamily	10 — Histone, subunit A

Domain ID domain_id	2nqbC00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	20 — Histone, subunit A
Homologous superfamily homologous superfamily	10 — Histone, subunit A

Domain ID domain_id	2nqbD00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	20 — Histone, subunit A
Homologous superfamily homologous superfamily	10 — Histone, subunit A

Domain ID domain_id	2nqbE00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	20 — Histone, subunit A
Homologous superfamily homologous superfamily	10 — Histone, subunit A

Domain ID domain_id	2nqbF00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	20 — Histone, subunit A
Homologous superfamily homologous superfamily	10 — Histone, subunit A

Domain ID domain_id	2nqbG00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	20 — Histone, subunit A
Homologous superfamily homologous superfamily	10 — Histone, subunit A

Domain ID domain_id	2nqbH00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	20 — Histone, subunit A
Homologous superfamily homologous superfamily	10 — Histone, subunit A

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8. Citations (1)

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Unit-cell length a length_a	106.143 Å
Unit-cell length b length_b	109.581 Å
Unit-cell length c length_c	182.045 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.300 Å
Low-resolution limit resolution_low	99.000 Å
R factor r_factor	—
R_work r_work	0.2233
R_free r_free	0.2540

fit	/app/data/saxs_computation/nq/2nqb/2nqb.fit
pddf	/app/data/pr_computation/nq/2nqb/2nqb.pr.out
profile	/app/data/saxs_computation/nq/2nqb/2nqb.dat

Drosophila Nucleosome Structure

1. Protein Identity and Related Structures Protein Identity & Related Structures

Histone H3

State in the Current Structure

Other States of the Same Protein in the Database

Histone H4

State in the Current Structure

Other States of the Same Protein in the Database

Histone H2A

State in the Current Structure

Other States of the Same Protein in the Database

Histone H2B

State in the Current Structure

Other States of the Same Protein in the Database

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

2. Structure Basics 2. Structure Basics

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

5. Crystallography and Experiment 5. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

6. Entities and Polymers Entities & Polymers (6)

Entity 1 Entity 1 polymer

Polymer Polymer

来源 Source

Entity 2 Entity 2 polymer

Polymer Polymer

来源 Source

Entity 3 Entity 3 polymer

Polymer Polymer

来源 Source

Entity 4 Entity 4 polymer

Polymer Polymer

来源 Source

Entity 5 Entity 5 polymer

Polymer Polymer

来源 Source

Entity 6 Entity 6 water

7. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

8. Citations (1)

9. Files and Curves (10)

Files (7)

Curves (3)