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2do3

Solution structure of the third KOW motif of transcription elongation factor SPT5

Method: SOLUTION NMR Dmax: 45.6 Å Quality: REASONABLE
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Transcription elongation factor SPT5

Homo sapiens

UniProt O00267

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 462–523 Fragment：KOW motif No other associated polymer SOLUTION NMR NMR measurement conditions：pH 7；298 K；Ionic strength (raw mmCIF value) 120mM；Pressure ambient NMR sample composition：1.1mM 13C/15N-PROTEIN; 20mM d-Tris-HCl(pH7.0); 100mM NaCl; 1mM d-DTT; 0.02% NaN3; 90% H2O, 10% D2O | 90% H2O/10% D2O 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 2DO3 Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Method and Experimental Conditions Structure Quality
2E6Z Solution structure of the second KOW motif of human transcription elongation factor SPT5 Deposited 2007-01-05 Different construct Different experimental conditions Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 420–471（52 aa） Fragment：KOW motif
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7；280 K；Ionic strength (raw mmCIF value) 120mM；Pressure ambient
NMR sample composition 1.11mM 13C-15N PROTEIN; 20mM d-Tris-HCl(pH7.0); 100mM NaCl; 1mM d-DTT; 0.02% NaN3; 90% H2O, 10% D2O | 90% H2O/10% D2O
Resolution not provided
2E70 Solution structure of the fifth KOW motif of human transcription elongation factor SPT5 Deposited 2007-01-05 Different construct Different experimental conditions Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 694–757（64 aa） Fragment：KOW motif
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7；298 K；Ionic strength (raw mmCIF value) 120mM；Pressure ambient
NMR sample composition 1.15mM 13C-15N PROTEIN; 20mM d-Tris-HCl(pH7.0); 100mM NaCl; 1mM d-DTT; 0.02% NaN3; 90% H2O, 10% D2O | 90% H2O/10% D2O
Resolution not provided
3H7H Crystal structure of the human transcription elongation factor DSIF, hSpt4/hSpt5 (176-273) Deposited 2009-04-27 Different construct 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 B 176–273（98 aa） Fragment：UNP residues 176-273
Not recorded BME BETA-MERCAPTOETHANOL × 1 ZN ZINC ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；290 K；Ammonium sulfate, PEG 3350, Tris/HCl, beta-mercaptoethanol, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 290K
Resolution 1.55 Å R-free 0.222
4L1U Crystal Structure of Human Rtf1 Plus3 Domain in Complex with Spt5 CTR Phosphopeptide Deposited 2013-06-03 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 G 778–790（13 aa） Fragment：CTR, UNP residues 778-790
Non-standard monomer：Yes (specific site not provided by mmCIF) SO4 SULFATE ION × 7 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.2；293 K；Sodium acetate, Ammonium sulfate, pH 4.2, vapor diffusion, sitting drop, temperature 293K
Resolution 2.42 Å R-free 0.226
4L1U Crystal Structure of Human Rtf1 Plus3 Domain in Complex with Spt5 CTR Phosphopeptide Deposited 2013-06-03 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric
Chain H 778–790（13 aa） Fragment：CTR, UNP residues 778-790
Non-standard monomer：Yes (specific site not provided by mmCIF) SO4 SULFATE ION × 4 GOL GLYCEROL × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.2；293 K；Sodium acetate, Ammonium sulfate, pH 4.2, vapor diffusion, sitting drop, temperature 293K
Resolution 2.42 Å R-free 0.226
4L1U Crystal Structure of Human Rtf1 Plus3 Domain in Complex with Spt5 CTR Phosphopeptide Deposited 2013-06-03 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 3 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric
Chain I 778–790（13 aa） Fragment：CTR, UNP residues 778-790
Non-standard monomer：Yes (specific site not provided by mmCIF) SO4 SULFATE ION × 5 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.2；293 K；Sodium acetate, Ammonium sulfate, pH 4.2, vapor diffusion, sitting drop, temperature 293K
Resolution 2.42 Å R-free 0.226
4L1U Crystal Structure of Human Rtf1 Plus3 Domain in Complex with Spt5 CTR Phosphopeptide Deposited 2013-06-03 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 4 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric
Chain J 778–790（13 aa） Fragment：CTR, UNP residues 778-790
Non-standard monomer：Yes (specific site not provided by mmCIF) SO4 SULFATE ION × 3 GOL GLYCEROL × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.2；293 K；Sodium acetate, Ammonium sulfate, pH 4.2, vapor diffusion, sitting drop, temperature 293K
Resolution 2.42 Å R-free 0.226
5OHO Crystal structure of the KOWx-KOW4 domain of human DSIF Deposited 2017-07-17 Different construct Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 536–646（111 aa）
Not recorded GOL GLYCEROL × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；293 K；0.1 M sodium cacodylate pH 6.5, 1.0 M tri-sodium citrate dihydrate
Resolution 1.60 Å R-free 0.221
5OHO Crystal structure of the KOWx-KOW4 domain of human DSIF Deposited 2017-07-17 Different construct Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain B 536–646（111 aa）
Not recorded GOL GLYCEROL × 2 CL CHLORIDE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；293 K；0.1 M sodium cacodylate pH 6.5, 1.0 M tri-sodium citrate dihydrate
Resolution 1.60 Å R-free 0.221
5OHQ Crystal structure of the KOW6-KOW7 domain of human DSIF Deposited 2017-07-17 Different construct Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 979–1087（109 aa）
Not recorded CL CHLORIDE ION × 1 NA SODIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；293 K；0.1 M bis-tris propane pH 7, 3 M sodium formate
Resolution 1.10 Å R-free 0.140
5OIK Structure of an RNA polymerase II-DSIF transcription elongation complex Deposited 2017-07-18 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 14 PDB declaration: heptadecameric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 8 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.25；pH was adjusted at 25 degrees Celsius
cryo-EM vitrification conditions Cryogen ETHANE；Sample (four microliters) was applied to glow-discharged Quantifoil R 2/1 holey carbon grids, which were then blotted for 8.5s and plunge-frozen in liquid ethane.
Resolution 3.70 Å
6EQY 4th KOW domain of human hSpt5 Deposited 2017-10-16 Different construct Different experimental conditions Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 522–647（126 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 6.4；298 K；Ionic strength (raw mmCIF value) 40；Pressure 1
NMR sample composition 0.6 mM [U-99% 13C; U-99% 15N] KOW4, 20 mM sodium phosphate, 20 mM sodium chloride, 0.5 mM DTT, 90% H2O/10% D2O | 90% H2O/10% D2O
Resolution not provided
6ER0 6th KOW domain of human hSpt5 Deposited 2017-10-16 Different construct Different experimental conditions Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 961–1087（127 aa） Fragment：KOW6 domain, UNP residues 961-1087
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 6.4；298 K；Ionic strength (raw mmCIF value) 40；Pressure 1
NMR sample composition 0.44 mM [U-99% 13C; U-99% 15N] KOW6, 20 mM sodium phosphate, 20 mM sodium chloride, 0.5 mM DTT, 90% H2O/10% D2O | 90% H2O/10% D2O
Resolution not provided
6GMH Structure of activated transcription complex Pol II-DSIF-PAF-SPT6 Deposited 2018-05-26 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 20 PDB declaration: heptadecameric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE；10s wait prior to blotting, blotting 8.5s
Resolution 3.10 Å
6GML Structure of paused transcription complex Pol II-DSIF-NELF Deposited 2018-05-27 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 Z 1–1087（1087 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 9 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.20 Å
6TED Structure of complete, activated transcription complex Pol II-DSIF-PAF-SPT6 uncovers allosteric elongation activation by RTF1 Deposited 2019-11-11 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 21 PDB declaration: 24-meric
Chain Z 1–1087（1087 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE；2 microliters applied to both sides of grid. Sample incubated on grid for 10s prior to blotting. Blotting for 8.5s.
Resolution 3.10 Å
7OKX Structure of active transcription elongation complex Pol II-DSIF (SPT5-KOW5)-ELL2-EAF1 (composite structure) Deposited 2021-05-18 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 15 PDB declaration: octadecameric
Chain Z 1–1087（1087 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 8 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.30 Å
7OKY Structure of active transcription elongation complex Pol II-DSIF-ELL2-EAF1(composite structure) Deposited 2021-05-18 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 16 PDB declaration: nonadecameric
Chain Z 1–1087（1087 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 9 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.14 Å
7OL0 Structure of active transcription elongation complex Pol II-DSIF (SPT5-KOW5) Deposited 2021-05-18 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 13 PDB declaration: hexadecameric
Chain Z 1–1087（1087 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 8 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
7PKS Structural basis of Integrator-mediated transcription regulation Deposited 2021-08-26 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 30 PDB declaration: 31-meric
Chain Z 1–1087（1087 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 10 MN MANGANESE (II) ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.60 Å
7UNC Pol II-DSIF-SPT6-PAF1c-TFIIS complex with rewrapped nucleosome Deposited 2022-04-10 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 29 PDB declaration: 32-meric
Chain Z 1–1087（1087 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) ZN ZINC ION × 8 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
7UND Pol II-DSIF-SPT6-PAF1c-TFIIS-nucleosome complex (stalled at +38) Deposited 2022-04-10 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 30 PDB declaration: 33-meric
Chain Z 1–1087（1087 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
7YCX The structure of INTAC-PEC complex Deposited 2022-07-02 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 31 PDB declaration: 34-meric
Chain j 1–1087（1087 aa）
Not recorded ZN ZINC ION × 10 MN MANGANESE (II) ION × 2 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.18 Å
8A3Y Structure of mammalian Pol II-DSIF-SPT6-PAF1-TFIIS-hexasome elongation complex Deposited 2022-06-09 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 Heteromer；Protein × 27 PDB declaration: 30-meric
Chain Z 1–1087（1087 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.30 Å
8P4C Structural insights into human co-transcriptional capping - structure 3 Deposited 2023-05-20 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 15 PDB declaration: octadecameric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 3 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å
8P4D Structural insights into human co-transcriptional capping - structure 4 Deposited 2023-05-20 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 15 PDB declaration: octadecameric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.60 Å
8P4E Structural insights into human co-transcriptional capping - structure 5 Deposited 2023-05-20 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 15 PDB declaration: octadecameric
Chain Z 1–1087（1087 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 8 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.90 Å
8P4F Structural insights into human co-transcriptional capping - structure 6 Deposited 2023-05-20 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 15 PDB declaration: octadecameric
Chain Z 1–1087（1087 aa）
Not recorded MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE × 1 ZN ZINC ION × 8 MG MAGNESIUM ION × 1 SAM S-ADENOSYLMETHIONINE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.00 Å
8RBX Structure of Integrator-PP2A bound to a paused RNA polymerase II-DSIF-NELF-nucleosome complex Deposited 2023-12-05 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 43 PDB declaration: 46-meric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 10 MG MAGNESIUM ION × 1 MN MANGANESE (II) ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.10 Å
8UHA Structure of paused transcription complex Pol II-DSIF-NELF - tilted Deposited 2023-10-08 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 Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.50 Å
8UHD Structure of paused transcription complex Pol II-DSIF-NELF - post-translocated Deposited 2023-10-08 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 Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
8UHG Structure of paused transcription complex Pol II-DSIF-NELF - poised post-translocated Deposited 2023-10-09 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 17 PDB declaration: eicosameric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 8 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å
8UI0 Structure of poised transcription complex Pol II-DSIF-NELF - pre-translocated Deposited 2023-10-09 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 17 PDB declaration: eicosameric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 8 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å
8UIS Structure of transcription complex Pol II-DSIF-NELF-TFIIS Deposited 2023-10-10 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 16 PDB declaration: nonadecameric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 8 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.23 Å
8W8E human co-transcriptional RNA capping enzyme RNGTT Deposited 2023-09-02 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 19 PDB declaration: 22-meric
Chain Z 1–1087（1087 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 8 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE-PROPANE
Resolution 3.90 Å
8W8F human co-transcriptional RNA capping enzyme RNGTT-CMTR1 Deposited 2023-09-02 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 16 PDB declaration: nonadecameric
Chain Z 1–1087（1087 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 8 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE-PROPANE
Resolution 4.00 Å
8XRM RNA polymerase II elongation complex with DSIF, SPT6, and ELOF1 transcribing genomic DNA extracted from human nuclei Deposited 2024-01-07 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 16 PDB declaration: 19-meric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 10 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.13 Å
9EGX RNA polymerase II-DSIF-SPT6-PAF1c-TFIIS-IWS1-hexasome, bp +27 Deposited 2024-11-21 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 29 PDB declaration: 32-meric
Chain Z 1–1087（1087 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.90 Å
9EGY RNA polymerase II-DSIF-SPT6-PAF1c-TFIIS-IWS1-nucleosome, bp +27 Deposited 2024-11-21 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 31 PDB declaration: 34-meric
Chain Z 1–1087（1087 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.90 Å
9EGZ RNA polymerase II-DSIF-SPT6-PAF1c-TFIIS-IWS1-SETD2-nucleosome, bp +27 Deposited 2024-11-21 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 32 PDB declaration: 35-meric
Chain Z 1–1087（1087 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) ZN ZINC ION × 12 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.90 Å
9EH0 RNA polymerase II-DSIF-SPT6-PAF1c-TFIIS-IWS1-SETD2-nucleosome, 30 bp upstream Deposited 2024-11-21 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 32 PDB declaration: 35-meric
Chain Z 1–1087（1087 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.60 Å
9EH2 RNA polymerase II-DSIF-SPT6-PAF1c-TFIIS-IWS1-SETD2-FACT nucleosome upstream Deposited 2024-11-21 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 32 PDB declaration: 35-meric
Chain Z 1–1087（1087 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å
9FYX Influenza A/H7N9 polymerase pre-cleavage cap-snatching complex Deposited 2024-07-04 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: 23-meric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 9 G1G 7-METHYL-GUANOSINE-5'-TRIPHOSPHATE-5'-(2'-O-METHYL)-GUANOSINE × 1 MG MAGNESIUM ION × 2 PO4 PHOSPHATE ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8；20 mM BICINE pH 8.0 150 mM NaCl 0.1 mM MgCl2 4% glycerol
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.30 Å
9G0A Influenza A/H7N9 polymerase post-cleavage cap-snatching complex Deposited 2024-07-07 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: 23-meric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 8 MG MAGNESIUM ION × 2 G1G 7-METHYL-GUANOSINE-5'-TRIPHOSPHATE-5'-(2'-O-METHYL)-GUANOSINE × 1 PO4 PHOSPHATE ION × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 8；20 mM BICINE pH 8.0 150 mM NaCl 3 mM MgCl2 4% glycerol
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å
9HVQ Structure of the transcribing Pol II-DSIF-PAF-SPT6-RECQL5 complex Deposited 2024-12-31 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 21 PDB declaration: 24-meric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 8 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；20 mM HEPES pH 7.5, 50 mM KCl, 4 mM MgCl2, 1 mM DTT
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.00 Å
9J0N Paused elongation complex of mammalian RNA polymerase II with nucleosome (PEC2-nuc) Deposited 2024-08-02 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 27 PDB declaration: 30-meric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.9
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.40 Å
9J0O Arrested elongation complex of mammalian RNA polymerase II with nucleosome (AEC1-nuc) Deposited 2024-08-02 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 26 PDB declaration: 29-meric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.9
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.30 Å
9J0P Arrested elongation complex of mammalian RNA polymerase II with nucleosome (AEC2-nuc) Deposited 2024-08-02 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 26 PDB declaration: 29-meric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.9
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.30 Å
9MLC Pol II-DSIF-SPT6-PAF1c-TFIIS-IWS1-ELOF1-LEDGF-nucleosome activated elongation complex Composite map T Deposited 2024-12-19 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 24 PDB declaration: 27-meric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 10 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.40 Å
9QEQ Structure of the transcribing Pol II-DSIF-SPT6-U1 snRNP complex Deposited 2025-03-10 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 24 PDB declaration: 28-meric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 8 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；20 mM Hepes, 100 mM NaCl, 3 mM MgCl2, 0.5 mM TCEP
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.50 Å
9RTN State 2 MAP 2 SPT6 with SETD2 Deposited 2025-07-03 Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric
Chain Z 1–1087（1087 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.82 Å
9RTT Activated Elongation Complex with IWS1 and ELOF1 Deposited 2025-07-03 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 22 PDB declaration: 25-meric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.01 Å
9RZD State 3 MAP 2 SPT6 with SETD2 Deposited 2025-07-15 Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric
Chain Z 1–1087（1087 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.69 Å
9RZE State 2 MAP 3 RNA Pol II activated elongation complex with SETD2 bound to proximal upstream H3 Deposited 2025-07-15 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 31 PDB declaration: 34-meric
Chain Z 1–1087（1087 aa）
Not recorded ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 8.53 Å
9S0U State 3 MAP 3 RNA Pol II activated elongation complex with SETD2 bound to distal upstream H3 Deposited 2025-07-17 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 32 PDB declaration: 35-meric
Chain Z 1–1087（1087 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 6.72 Å
9S3G State 1 MAP3 RNA Pol II activated elongation complex with SETD2 and upstream hexasome Deposited 2025-07-24 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Other combination Heteromer；Protein × 31 PDB declaration: 34-meric
Chain Z 1–1087（1087 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 6.40 Å
9VD9 Cryo-EM structure of the human DSS1-INTAC-PEC complex Deposited 2025-06-07 Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Insufficient information Heteromer；Protein × 35 PDB declaration: 38-meric
Chain j 1–1087（1087 aa）
Not recorded ZN ZINC ION × 10 MN MANGANESE (II) ION × 2 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.60 Å

53 other PDB entries and 57 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name SPT5H_HUMAN
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 8–69； UniProt 462–523

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.

SAXS scattering curve SAXS Profile

SAXS profile for 2do3

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 2do3
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2. Structure Basics 2. Structure Basics

Entry ID entry_id2do3
Deposition date deposition_date2006-04-27
Structure title titleSolution structure of the third KOW motif of transcription elongation factor SPT5
Keywords keywords;KOW motif, Structural Genomics, NPPSFA, National Project on Protein Structural and Functional Analyses, RIKEN Structural Genomics/Proteomics Initiative, RSGI, TRANSCRIPTION ;; TRANSCRIPTION
Experimental Method methodSOLUTION NMR
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3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier16.17 Å
Radius of gyration Rg (electron density) rg_electron15.33 Å
Forward intensity I(0) i0332971000.00
Molecular weight molecular_weight154180.0 kDa
Excluded volume excluded_volume193430 ų
Envelope volume envelope_volume44705 ų
Hydration-shell volume shell_volume17282 ų
Envelope diameter envelope_diameter69.8 Å
Shell Rg shell_rg28.74 Å
Envelope Rg envelope_rg25.10 Å
Shape Rg shape_rg15.32 Å
Total Rg total_rg15.87 Å
Total atoms total_atoms21620
Residues n_residues1380
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 Å−1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3
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4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax45.6 Å
Rg (real space) rg_real15.07 Å
Rg uncertainty (real space) rg_real_error0.12 Å
I(0) (real space) i0_real3.1860e+08
I(0) uncertainty (real space) i0_real_error3.1690e+06
Rg (reciprocal space) rg_reciprocal16.58 Å
I(0) (reciprocal space) i0_reciprocal333000000.0000
Solution quality estimate total_estimate0.6251
Solution quality rating solution_quality REASONABLE a REASONABLE solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary15.2 Å
Skewness Skewness skewness0.612
Kurtosis Kurtosis kurtosis-0.215
Angular range angular_range— – 0.4900 Å−1
Current regularization parameter α current_alpha2.6690
Highest regularization parameter α highest_alpha155500.0000
Real-space data points n_real_points79
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.002; Oscil: 0.758; Stabil: 0.984; Sysdev: 0.000; Positv: 1.000; Valcen: 0.922; Smooth: 0.000
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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (1)

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7. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd2do3a1
Class classb — All beta proteins
Fold Fold foldb.34 — SH3-like barrel
Superfamily Superfamily superfamilyb.34.5 — Translation proteins SH3-like domain
Family Family familyb.34.5.5 — SPT5 KOW domain-like
Domain ID domain_idd2do3a2
Class classl — Artifacts
Fold Fold foldl.1 — Tags
Superfamily Superfamily superfamilyl.1.1 — Tags
Family Family familyl.1.1.1 — Tags

CATH v4.4 (1 domains)

Domain ID domain_id2do3A01
Class class2 — Mainly Beta
Architecture architecture30 — Roll
Topology topology30 — SH3 type barrels.
Homologous superfamily homologous superfamily30 —
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8. Citations (1)

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9. Files and Curves (10)