SAXSdb — 2ld0

Huntingtin

OrganismNot specified

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 monomer Monomer Protein × 1 PDB declaration: monomeric（1） Consistent with protein copy count	Chain A； UniProt 1–17	Fragment：N-terminal residues 1-17 Non-standard monomer：Yes (specific site not provided by mmCIF)	No other associated polymer	SOLUTION NMR NMR measurement conditions：pH 7.2；293 K；Ionic strength (raw mmCIF value) 0.15；Pressure ambient NMR sample composition：0.2 - 0.3 mM 15N labeled at PHE11 htt17, 10 % D2O, 50 % d3 TFE, 40 % PBS, trifluoroethanol/water \| trifluoroethanol/water	Resolution not provided

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 2LD0	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
2LD2 Solution structure of the N-terminal domain of huntingtin (htt17) in presence of DPC micelles Deposited 2011-05-13	Different experimental conditions	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–17（17 aa） Fragment：N-terminal residues 1-17	Non-standard monomer：Yes (specific site not provided by mmCIF)	No recorded non-water small molecule	SOLUTION NMR NMR measurement conditions pH 6；293 K；Ionic strength (raw mmCIF value) 0.025；Pressure ambient NMR sample composition 0.2-0.3 mM 15N labeled at PHE11 htt17, 10 % D2O, 25 mM sodium phosphate, 100 mM d38 DPC, 90% H2O/10% D2O \| 90% H2O/10% D2O	Resolution not provided
3IO4 Huntingtin amino-terminal region with 17 Gln residues - Crystal C90 Deposited 2009-08-13	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 1–64（64 aa） Fragment：Fusion protein, see remark 999 Chain B 1–64（64 aa） Fragment：Fusion protein, see remark 999 Chain C 1–64（64 aa） Fragment：Fusion protein, see remark 999	Not recorded	ZN ZINC ION × 8 CA CALCIUM ION × 6	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.2；277 K；12% polyethylene glycol, 200 mM Zn Acetate, 200 mM Sodium Acetate, 100 mM Sodium Cacodylate pH 6.5 to 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 277K	Resolution 3.63 Å R-free 0.304
3IO6 Huntingtin amino-terminal region with 17 Gln residues - crystal C92-a Deposited 2009-08-13	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 1–64（64 aa） Fragment：FUSION PROTEIN, SEE REMARK 999 Chain B 1–64（64 aa） Fragment：FUSION PROTEIN, SEE REMARK 999 Chain C 1–64（64 aa） Fragment：FUSION PROTEIN, SEE REMARK 999	Not recorded	ZN ZINC ION × 5 CA CALCIUM ION × 9	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.2；pH 7.2, VAPOR DIFFUSION, HANGING DROP	Resolution 3.70 Å R-free 0.293
3IOR Huntingtin amino-terminal region with 17 Gln residues - crystal C95 Deposited 2009-08-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 1–64（64 aa） Fragment：Fusion protein, see remark 999 Chain B 1–64（64 aa） Fragment：Fusion protein, see remark 999 Chain C 1–64（64 aa） Fragment：Fusion protein, see remark 999	Not recorded	ZN ZINC ION × 6 CA CALCIUM ION × 6	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；278 K；12% PEG 4000, 200 mM Zn acetate, 200 mM Sodium acetate, 100 mM Sodium Cacodylate pH 6.5-7.4 , VAPOR DIFFUSION, HANGING DROP, temperature 278K	Resolution 3.60 Å R-free 0.267
3IOT Huntingtin amino-terminal region with 17 Gln residues - crystal C92-b Deposited 2009-08-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 1–64（64 aa） Fragment：Fusion protein, see remark 999,Fusion protein, see remark 999 Chain B 1–64（64 aa） Fragment：Fusion protein, see remark 999,Fusion protein, see remark 999 Chain C 1–64（64 aa） Fragment：Fusion protein, see remark 999,Fusion protein, see remark 999	Not recorded	ZN ZINC ION × 9 CA CALCIUM ION × 9	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；278 K；12% PEG 4000, 200 mM Zn acetate, 200 mM Sodium acetate, 100 mM Sodium Cacodylate pH 6.5-7.4, VAPOR DIFFUSION, HANGING DROP, temperature 278K	Resolution 3.50 Å R-free 0.295
3IOU Huntingtin amino-terminal region with 17 Gln residues - crystal C94 Deposited 2009-08-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 1–64（64 aa） Fragment：Fusion protein, see remark 999,Fusion protein, see remark 999 Chain B 1–64（64 aa） Fragment：Fusion protein, see remark 999,Fusion protein, see remark 999 Chain C 1–64（64 aa） Fragment：Fusion protein, see remark 999,Fusion protein, see remark 999	Not recorded	ZN ZINC ION × 8 CA CALCIUM ION × 5	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；278 K；12% PEG 4000, 200 mM Zn acetate, 200 mM Sodium acetate, 100 mM Sodium Cacodylate pH 6.5-7.4, VAPOR DIFFUSION, HANGING DROP, temperature 278K	Resolution 3.70 Å R-free 0.299
3IOV Huntingtin amino-terminal region with 17 Gln residues - crystal C99 Deposited 2009-08-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 1–64（64 aa） Fragment：Fusion protein, see remark 999,Fusion protein, see remark 999 Chain B 1–64（64 aa） Fragment：Fusion protein, see remark 999,Fusion protein, see remark 999 Chain C 1–64（64 aa） Fragment：Fusion protein, see remark 999,Fusion protein, see remark 999	Not recorded	ZN ZINC ION × 6 CA CALCIUM ION × 7	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；278 K；12% PEG 4000, 200 mM Zn acetate, 200 mM Sodium acetate, 100 mM Sodium Cacodylate pH 6.5-7.4, VAPOR DIFFUSION, HANGING DROP, temperature 278K	Resolution 3.70 Å R-free 0.280
3IOW Huntingtin amino-terminal region with 17 Gln residues - crystal C99-Hg Deposited 2009-08-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 1–64（64 aa） Fragment：Fusion protein, see remark 999,Fusion protein, see remark 999 Chain B 1–64（64 aa） Fragment：Fusion protein, see remark 999,Fusion protein, see remark 999 Chain C 1–64（64 aa） Fragment：Fusion protein, see remark 999,Fusion protein, see remark 999	Not recorded	ZN ZINC ION × 7 CA CALCIUM ION × 10	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；278 K；12% PEG 4000, 200 mM Zn acetate, 200 mM Sodium acetate, 100 mM Sodium Cacodylate pH 6.5-7.4, VAPOR DIFFUSION, HANGING DROP, temperature 278K	Resolution 3.50 Å R-free 0.281
3LRH Structure of anti-huntingtin VL domain in complex with huntingtin peptide Deposited 2010-02-11	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 5–18（14 aa） Fragment：huntingtin peptide	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.1；293 K；10 % PEG600, 0.1 mM potassium phosphate dibasic/citric acid, pH 4.1, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.60 Å R-free 0.278
3LRH Structure of anti-huntingtin VL domain in complex with huntingtin peptide Deposited 2010-02-11	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain D 5–18（14 aa） Fragment：huntingtin peptide	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.1；293 K；10 % PEG600, 0.1 mM potassium phosphate dibasic/citric acid, pH 4.1, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.60 Å R-free 0.278
3LRH Structure of anti-huntingtin VL domain in complex with huntingtin peptide Deposited 2010-02-11	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 3 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain F 5–18（14 aa） Fragment：huntingtin peptide	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.1；293 K；10 % PEG600, 0.1 mM potassium phosphate dibasic/citric acid, pH 4.1, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.60 Å R-free 0.278
3LRH Structure of anti-huntingtin VL domain in complex with huntingtin peptide Deposited 2010-02-11	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 4 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain H 5–18（14 aa） Fragment：huntingtin peptide	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.1；293 K；10 % PEG600, 0.1 mM potassium phosphate dibasic/citric acid, pH 4.1, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.60 Å R-free 0.278
3LRH Structure of anti-huntingtin VL domain in complex with huntingtin peptide Deposited 2010-02-11	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 5 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain J 5–18（14 aa） Fragment：huntingtin peptide	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.1；293 K；10 % PEG600, 0.1 mM potassium phosphate dibasic/citric acid, pH 4.1, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.60 Å R-free 0.278
3LRH Structure of anti-huntingtin VL domain in complex with huntingtin peptide Deposited 2010-02-11	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 6 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain L 5–18（14 aa） Fragment：huntingtin peptide	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.1；293 K；10 % PEG600, 0.1 mM potassium phosphate dibasic/citric acid, pH 4.1, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.60 Å R-free 0.278
3LRH Structure of anti-huntingtin VL domain in complex with huntingtin peptide Deposited 2010-02-11	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 7 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain N 5–18（14 aa） Fragment：huntingtin peptide	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.1；293 K；10 % PEG600, 0.1 mM potassium phosphate dibasic/citric acid, pH 4.1, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.60 Å R-free 0.278
3LRH Structure of anti-huntingtin VL domain in complex with huntingtin peptide Deposited 2010-02-11	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 8 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain P 5–18（14 aa） Fragment：huntingtin peptide	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.1；293 K；10 % PEG600, 0.1 mM potassium phosphate dibasic/citric acid, pH 4.1, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.60 Å R-free 0.278
4FE8 Crystal Structure of Htt36Q3H-EX1-X1-C1(Alpha) Deposited 2012-05-29	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 1–64（64 aa） Fragment：Huntingtin protein exon1 domain (UNP residues 1-164),Huntingtin protein exon1 domain (UNP residues 1-164) Chain B 1–64（64 aa） Fragment：Huntingtin protein exon1 domain (UNP residues 1-164),Huntingtin protein exon1 domain (UNP residues 1-164) Chain C 1–64（64 aa） Fragment：Huntingtin protein exon1 domain (UNP residues 1-164),Huntingtin protein exon1 domain (UNP residues 1-164)	Mutation：HQHQH,HQHQH Mutation：HQHQH,HQHQH Mutation：HQHQH,HQHQH	ZN ZINC ION × 31	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；278 K；PEG12K, Na Acetate, Zn Acetate, Na Cacodylate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 278K	Resolution 3.00 Å R-free 0.275
4FEB Crystal Structure of Htt36Q3H-EX1-X1-C2(Beta) Deposited 2012-05-29	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 1–64（64 aa） Chain B 1–64（64 aa） Chain C 1–64（64 aa）	Mutation：HQHQH Mutation：HQHQH Mutation：HQHQH	ZN ZINC ION × 38 NA SODIUM ION × 6	X-RAY DIFFRACTION X-ray crystallization conditions hanging drop；pH 6.5；278 K；PEG12K, Na Acetate, Zn Acetate, Na Cacodylate, pH 6.5, hanging drop, temperature 278K	Resolution 2.80 Å R-free 0.275
4FEC Crystal Structure of Htt36Q3H Deposited 2012-05-30	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 1–64（64 aa） Fragment：Huntingtin protein exon1 domain Chain B 1–64（64 aa） Fragment：Huntingtin protein exon1 domain Chain C 1–64（64 aa） Fragment：Huntingtin protein exon1 domain	Mutation：HQHQH,HQHQH Mutation：HQHQH,HQHQH Mutation：HQHQH,HQHQH	ZN ZINC ION × 31	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；278 K；PEG12K, Na Acetate, Zn Acetate, Na Cacodylate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 278K	Resolution 3.00 Å R-free 0.275
4FED Crystal Structure of Htt36Q3H Deposited 2012-05-30	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 1–64（64 aa） Fragment：Huntingtin protein exon1 domain,Huntingtin protein exon1 domain Chain B 1–64（64 aa） Fragment：Huntingtin protein exon1 domain,Huntingtin protein exon1 domain Chain C 1–64（64 aa） Fragment：Huntingtin protein exon1 domain,Huntingtin protein exon1 domain	Mutation：HQHQH Mutation：HQHQH Mutation：HQHQH	ZN ZINC ION × 35 CA CALCIUM ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；278 K；PEG12K, Na Acetate, Zn Acetate, Na Cacodylate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 278K	Resolution 2.81 Å R-free 0.269
4RAV Crystal structure of scFvC4 in complex with the first 17 AA of huntingtin Deposited 2014-09-11	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain E 1–17（17 aa） Chain F 1–17（17 aa）	Not recorded	SO4 SULFATE ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.6；291 K；0.2 M ammonium sulphate, 25% PEG 4000 and 0.1 M sodium acetate buffer at pH 4.6, VAPOR DIFFUSION, SITTING DROP, temperature 291K	Resolution 2.50 Å R-free 0.226
6EZ8 Human Huntingtin-HAP40 complex structure Deposited 2017-11-14	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 1–3142（3142 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE-PROPANE	Resolution 4.00 Å
6N8C Structure of the Huntingtin tetramer/dimer mixture determined by paramagnetic NMR Deposited 2018-11-29	Different construct Different mutation/modification Different oligomeric state Different experimental conditions	Assembly 1 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 2–24（23 aa） Chain B 2–24（23 aa） Chain C 2–24（23 aa） Chain D 2–24（23 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR NMR measurement conditions pH 6.5；278 K；Ionic strength (raw mmCIF value) 50；Pressure 1 NMR measurement conditions pH 6.5；283 K；Ionic strength (raw mmCIF value) 50；Pressure 1 NMR sample composition 1 mM [U-13C; U-15N] httNT-Q7, 90% H2O/10% D2O \| 90% H2O/10% D2O NMR sample composition 1 mM 2-13C glucose; U-15N httNT-Q7, 90% H2O/10% D2O \| 90% H2O/10% D2O NMR sample composition 0.6 mM [U-15N] httNT-Q7, 90% H2O/10% D2O \| 90% H2O/10% D2O NMR sample composition 0.75 mM 2-13C glucose; U-15N httNT-Q7, 90% H2O/10% D2O \| 90% H2O/10% D2O NMR sample composition 0.4 mM 2-13C glucose; U-15N httNT-Q7, 90% H2O/10% D2O \| 90% H2O/10% D2O	Resolution not provided
6RMH The Rigid-body refined model of the normal Huntingtin. Deposited 2019-05-06	Different construct Different mutation/modification Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–3142（3142 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE；blot 9 seconds incubate 30 seconds	Resolution 9.60 Å
6X9O High resolution cryoEM structure of huntingtin in complex with HAP40 Deposited 2020-06-03	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 1–3142（3142 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.60 Å
6YEJ Cryo-EM structure of the Full-length disease type human Huntingtin Deposited 2020-03-24	Different construct Different mutation/modification Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 18–3142（3125 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE；30 seconds incubation 8 seconds blotting	Resolution 18.20 Å
7DXJ Human 46QHuntingtin-HAP40 complex structure Deposited 2021-01-19	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 1–38（38 aa） Chain A 39–3142（3104 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7 cryo-EM vitrification conditions Cryogen ETHANE-PROPANE	Resolution 3.60 Å
7DXK Human 128QHuntingtin-HAP40 complex structure Deposited 2021-01-19	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 1–38（38 aa） Chain A 39–3142（3104 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7 cryo-EM vitrification conditions Cryogen ETHANE-PROPANE	Resolution 4.10 Å
8R2O Huntingtin-Q17, 1-66, N-MBP fusion Deposited 2023-11-07	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–64（64 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.25；293 K；0.8 M KH2PO4, 0.8 M NaH2PO4, and 0.1 M TRIS/HCl pH 8.25	Resolution 3.23 Å R-free 0.238
8R2O Huntingtin-Q17, 1-66, N-MBP fusion Deposited 2023-11-07	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–64（64 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.25；293 K；0.8 M KH2PO4, 0.8 M NaH2PO4, and 0.1 M TRIS/HCl pH 8.25	Resolution 3.23 Å R-free 0.238
8SAH Huntingtin C-HEAT domain in complex with HAP40 Deposited 2023-03-31	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 2093–3136（1044 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.20 Å
8VLX HTT in complex with HAP40 and a small molecule. Deposited 2024-01-12	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 1–3142（3142 aa）	Not recorded	A1ACS N-[(1S,2R)-2-benzylcyclopentyl]-N'-{1-[(1S)-1-(pyridin-4-yl)ethyl]piperidin-4-yl}urea × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4；25 mM Hepes, 300 mM NaCl, 0.025%CHAPS, 1mM DTT, 1mM Ligand, 1% DMSO cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.60 Å
8W15 HTT in complex with HAP40 in the apo state. Deposited 2024-02-15	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 1–3142（3142 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4；25 mM Hepes, 300 mM NaCl, 0.025%CHAPS, 1mM DTT, 1% DMSO cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.72 Å
8YAE Cryo-ET structure of huntingtin actin complex Deposited 2024-02-09	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 14 PDB declaration: tetradecameric	Chain A 1–3142（3142 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 10.08 Å
8YAO Cryo-ET structure of huntingtin actin dimer complex Deposited 2024-02-09	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 28 PDB declaration: 28-meric	Chain A 1–3142（3142 aa） Chain a 1–3142（3142 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 20.80 Å
9PMW Structure of HTTQ23-HAP40 complex bound to macrocycles HHL1, HD4 and HL2 Deposited 2025-07-18	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric	Chain A 1–3142（3142 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
9PN0 Structure of HTTQ23-HAP40 complex bound to macrocycles HHD3, HD4 and HL2 Deposited 2025-07-18	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric	Chain A 1–3142（3142 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.30 Å
9YR6 Structure of HTTQ23-HAP40 complex bound to a small molecule ligand Deposited 2025-10-16	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 1–3142（3142 aa）	Not recorded	A1CYY 2-[(1R)-2,2-difluorocyclopropyl]-N-[(1-methyl-1H-indazol-6-yl)methyl]aniline × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.30 Å

30 other PDB entries and 38 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	HD_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–17； UniProt 1–17

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.

Entry ID entry_id	2ld0
Deposition date deposition_date	2011-05-13
Structure title title	Solution structure of the N-terminal domain of huntingtin (htt17) in 50 % TFE
Keywords keywords	ALPHA HELIX, LIPID BINDING PROTEIN; LIPID BINDING PROTEIN
Experimental Method method	SOLUTION NMR

Radius of gyration Rg (Guinier) rg_guinier	8.29 Å
Radius of gyration Rg (electron density) rg_electron	8.90 Å
Forward intensity I(0) i0	18239100.00
Molecular weight molecular_weight	39489.0 kDa
Excluded volume excluded_volume	51274 Å³
Envelope volume envelope_volume	6256 Å³
Hydration-shell volume shell_volume	5541 Å³
Envelope diameter envelope_diameter	37.2 Å
Shell Rg shell_rg	15.15 Å
Envelope Rg envelope_rg	11.86 Å
Shape Rg shape_rg	8.74 Å
Total Rg total_rg	9.84 Å
Total atoms total_atoms	5760
Residues n_residues	340
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

Maximum dimension Dmax dmax	34.5 Å
Rg (real space) rg_real	8.62 Å
Rg uncertainty (real space) rg_real_error	0.52 Å
I(0) (real space) i0_real	1.8240e+07
I(0) uncertainty (real space) i0_real_error	2.0270e+05
Rg (reciprocal space) rg_reciprocal	8.61 Å
I(0) (reciprocal space) i0_reciprocal	18240000.0000
Solution quality estimate total_estimate	0.6384
Solution quality rating solution_quality	REASONABLE a REASONABLE solution
P(r) peaks n_peaks	2
Primary peak position r_peak_primary	6.1 Å
Skewness Skewness skewness	0.801
Kurtosis Kurtosis kurtosis	0.044
Angular range angular_range	— – 0.5000 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	1230.0000
Real-space data points n_real_points	80
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.124; Stabil: 0.999; Sysdev: 1.000; Positv: 1.000; Valcen: 0.001; Smooth: 0.927

Description description	Huntingtin
Molecular weight formula_weight	1975.4 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	5760

Solution structure of the N-terminal domain of huntingtin (htt17) in 50 % TFE

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

Huntingtin

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

6. Entities and Polymers Entities & Polymers (1)

Entity 1 Entity 1 polymer

Polymer Polymer

8. Citations (1)

9. Files and Curves (10)

Files (7)

Curves (3)

fit	/app/data/saxs_computation/ld/2ld0/2ld0.fit
pddf	/app/data/pr_computation/ld/2ld0/2ld0.pr.out
profile	/app/data/saxs_computation/ld/2ld0/2ld0.dat