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Protein Structures and Oligomeric States

Enter a protein name, UniProt accession or PDB ID. Name searches ask you to confirm the protein identity before related structures are queried.

Current Protein Identity：F1SKN8 New Search
43PDB entries
43Biological assembly
46chain/assembly records
Main Difference Dimensions in This Set
Different assembly state Different ligand/ion Different experimental conditions Different structure-quality metrics

Difference tags compare only the current result set; every original PDB and assembly record remains separate.

Related-Structure Differences

Each row represents one biological assembly in one PDB entry; multiple monomers of the same protein are listed separately.

PDB Entry Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Experimental Method Experimental Conditions Structure Quality
6EXV Structure of mammalian RNA polymerase II elongation complex inhibited by Alpha-amanitin Deposited 2017-11-09 Assembly 1 Other combination Heteromer；Protein × 13 PDB declaration: hexadecameric（16） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded ZN ZINC ION × 8 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.60 Å
6GMH Structure of activated transcription complex Pol II-DSIF-PAF-SPT6 Deposited 2018-05-26 Assembly 1 Other combination Heteromer；Protein × 20 PDB declaration: heptadecameric（17） Review required
Chain F 1–127（127 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 Assembly 1 Other combination Heteromer；Protein × 18 PDB declaration: 21-meric（21） Consistent with all polymers
Chain F 1–127（127 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 Assembly 1 Other combination Heteromer；Protein × 21 PDB declaration: 24-meric（24） Consistent with all polymers
Chain F 1–127（127 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；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
7B0Y Structure of a transcribing RNA polymerase II-U1 snRNP complex Deposited 2020-11-23 Assembly 1 Other combination Heteromer；Protein × 21 PDB declaration: 25-meric（25） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded ZN ZINC ION × 8 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.60 Å
7B7U Cryo-EM structure of mammalian RNA polymerase II in complex with human RPAP2 Deposited 2020-12-11 Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric（12） Consistent with protein count
Chain F 1–127（127 aa）
Not recorded ZN ZINC ION × 6 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
7NVR Human Mediator with RNA Polymerase II Pre-initiation complex Deposited 2021-03-15 Assembly 1 Protein–DNA Heteromer；Protein × 56 PDB declaration: 58-meric（58） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded SF4 IRON/SULFUR CLUSTER × 1 ZN ZINC ION × 18 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.50 Å
7NVS RNA polymerase II core pre-initiation complex with closed promoter DNA in proximal position Deposited 2021-03-16 Assembly 1 Protein–DNA Heteromer；Protein × 20 PDB declaration: 22-meric（22） Consistent with all polymers
Chain F 1–127（127 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 2.80 Å
7NVT RNA polymerase II core pre-initiation complex with closed promoter DNA in distal position Deposited 2021-03-16 Assembly 1 Protein–DNA Heteromer；Protein × 20 PDB declaration: 22-meric（22） Consistent with all polymers
Chain F 1–127（127 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 2.90 Å
7NVU RNA polymerase II core pre-initiation complex with open promoter DNA Deposited 2021-03-16 Assembly 1 Protein–DNA Heteromer；Protein × 20 PDB declaration: 22-meric（22） Consistent with all polymers
Chain F 1–127（127 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 2.50 Å
7NVY RNA polymerase II pre-initiation complex with closed promoter DNA in proximal position Deposited 2021-03-16 Assembly 1 Protein–DNA Heteromer；Protein × 30 PDB declaration: 32-meric（32） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded SF4 IRON/SULFUR CLUSTER × 1 ZN ZINC ION × 17 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 7.30 Å
7NVZ RNA polymerase II pre-initiation complex with closed promoter DNA in distal position Deposited 2021-03-16 Assembly 1 Protein–DNA Heteromer；Protein × 30 PDB declaration: 32-meric（32） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded SF4 IRON/SULFUR CLUSTER × 1 ZN ZINC ION × 17 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 7.20 Å
7NW0 RNA polymerase II pre-initiation complex with open promoter DNA Deposited 2021-03-16 Assembly 1 Protein–DNA Heteromer；Protein × 30 PDB declaration: 32-meric（32） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded SF4 IRON/SULFUR CLUSTER × 1 ZN ZINC ION × 15 ADP ADENOSINE-5'-DIPHOSPHATE × 1 MG MAGNESIUM ION × 2 BEF BERYLLIUM TRIFLUORIDE ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 6.60 Å
7OKX Structure of active transcription elongation complex Pol II-DSIF (SPT5-KOW5)-ELL2-EAF1 (composite structure) Deposited 2021-05-18 Assembly 1 Other combination Heteromer；Protein × 15 PDB declaration: octadecameric（18） Consistent with all polymers
Chain F 1–127（127 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 Assembly 1 Other combination Heteromer；Protein × 16 PDB declaration: nonadecameric（19） Consistent with all polymers
Chain F 1–127（127 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 Assembly 1 Other combination Heteromer；Protein × 13 PDB declaration: hexadecameric（16） Consistent with all polymers
Chain F 1–127（127 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
7OO3 Pol II-CSB-CSA-DDB1-UVSSA (Structure1) Deposited 2021-05-26 Assembly 1 Other combination Heteromer；Protein × 17 PDB declaration: eicosameric（20） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded ZN ZINC ION × 8 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
7OOB Pol II-CSB-CSA-DDB1-UVSSA-ADPBeF3 (Structure2) Deposited 2021-05-27 Assembly 1 Other combination Heteromer；Protein × 15 PDB declaration: octadecameric（18） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded ZN ZINC ION × 8 MG MAGNESIUM ION × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 1 BEF BERYLLIUM TRIFLUORIDE ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å
7OOP Pol II-CSB-CSA-DDB1-UVSSA-PAF-SPT6 (Structure 3) Deposited 2021-05-28 Assembly 1 Other combination Heteromer；Protein × 23 PDB declaration: 26-meric（26） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded ZN ZINC ION × 8 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.90 Å
7OPC Pol II-CSB-CRL4CSA-UVSSA-SPT6-PAF (Structure 4) Deposited 2021-05-31 Assembly 1 Other combination Heteromer；Protein × 25 PDB declaration: 28-meric（28） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded ZN ZINC ION × 8 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
7OPD Pol II-CSB-CRL4CSA-UVSSA-SPT6-PAF (Structure 5) Deposited 2021-05-31 Assembly 1 Other combination Heteromer；Protein × 25 PDB declaration: 28-meric（28） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded ZN ZINC ION × 8 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
7OZN RNA Polymerase II dimer (Class 1) Deposited 2021-06-28 Assembly 1 Protein heterocomplex Heteromer；Protein × 24 PDB declaration: 24-meric（24） Consistent with protein count
Chain F 1–127（127 aa）
Chain R 1–127（127 aa）
Not recorded ZN ZINC ION × 10 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.50 Å
7OZO RNA Polymerase II dimer (Class 2) Deposited 2021-06-28 Assembly 1 Protein heterocomplex Heteromer；Protein × 24 PDB declaration: 24-meric（24） Consistent with protein count
Chain F 1–127（127 aa）
Chain R 1–127（127 aa）
Not recorded ZN ZINC ION × 10 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å
7OZP RNA Polymerase II dimer (Class 3) Deposited 2021-06-28 Assembly 1 Protein heterocomplex Heteromer；Protein × 24 PDB declaration: 24-meric（24） Consistent with protein count
Chain F 1–127（127 aa）
Chain R 1–127（127 aa）
Not recorded ZN ZINC ION × 10 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å
7PKS Structural basis of Integrator-mediated transcription regulation Deposited 2021-08-26 Assembly 1 Other combination Heteromer；Protein × 30 PDB declaration: 31-meric（31） Review required
Chain F 1–127（127 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
7ZWD Structure of SNAPc containing Pol II pre-initiation complex bound to U5 snRNA promoter (CC) Deposited 2022-05-19 Assembly 1 Protein–DNA Heteromer；Protein × 22 PDB declaration: 24-meric（24） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded ZN ZINC ION × 11 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
7ZX7 Structure of SNAPc containing Pol II pre-initiation complex bound to U1 snRNA promoter (CC) Deposited 2022-05-20 Assembly 1 Protein–DNA Heteromer；Protein × 22 PDB declaration: 24-meric（24） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded ZN ZINC ION × 11 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.40 Å
7ZX8 Structure of SNAPc containing Pol II pre-initiation complex bound to U1 snRNA promoter (OC) Deposited 2022-05-20 Assembly 1 Protein–DNA Heteromer；Protein × 22 PDB declaration: 24-meric（24） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded ZN ZINC ION × 11 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
8B3D Structure of the Pol II-TCR-ELOF1 complex. Deposited 2022-09-16 Assembly 1 Other combination Heteromer；Protein × 17 PDB declaration: eicosameric（20） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded ZN ZINC ION × 10 MG MAGNESIUM ION × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 1 BEF BERYLLIUM TRIFLUORIDE ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.60 Å
8B3F Pol II-CSB-CSA-DDB1-ELOF1 Deposited 2022-09-16 Assembly 1 Other combination Heteromer；Protein × 16 PDB declaration: nonadecameric（19） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å
8BVW RNA polymerase II pre-initiation complex with the distal +1 nucleosome (PIC-Nuc18W) Deposited 2022-12-20 Assembly 1 Protein–DNA Heteromer；Protein × 40 PDB declaration: 42-meric（42） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded SF4 IRON/SULFUR CLUSTER × 1 ZN ZINC ION × 17 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.00 Å
8BYQ RNA polymerase II pre-initiation complex with the proximal +1 nucleosome (PIC-Nuc10W) Deposited 2022-12-14 Assembly 1 Protein–DNA Heteromer；Protein × 38 PDB declaration: 40-meric（40） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded SF4 IRON/SULFUR CLUSTER × 1 ZN ZINC ION × 16 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.10 Å
8BZ1 RNA polymerase II core pre-initiation complex with the proximal +1 nucleosome (cPIC-Nuc10W) Deposited 2022-12-14 Assembly 1 Protein–DNA Heteromer；Protein × 26 PDB declaration: 28-meric（28） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded ZN ZINC ION × 9 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.80 Å
8OEU Structure of the mammalian Pol II-SPT6 complex (composite structure, Structure 4) Deposited 2023-03-13 Assembly 1 Other combination Heteromer；Protein × 13 PDB declaration: hexadecameric（16） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 8 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.04 Å
8OEV Structure of the mammalian Pol II-SPT6-Elongin complex, lacking ELOA latch (composite structure, structure 3) Deposited 2023-03-13 Assembly 1 Other combination Heteromer；Protein × 16 PDB declaration: nonadecameric（19） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 8 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.86 Å
8OEW Structure of the mammalian Pol II-Elongin complex, lacking the ELOA latch (composite structure, structure 2) Deposited 2023-03-13 Assembly 1 Other combination Heteromer；Protein × 15 PDB declaration: octadecameric（18） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 8 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
8OF0 Structure of the mammalian Pol II-SPT6-Elongin complex, Structure 1 Deposited 2023-03-13 Assembly 1 Other combination Heteromer；Protein × 16 PDB declaration: nonadecameric（19） Consistent with all polymers
Chain F 1–127（127 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 8 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.05 Å
8P4A Structural insights into human co-transcriptional capping - structure 1 Deposited 2023-05-20 Assembly 1 Other combination Heteromer；Protein × 13 PDB declaration: hexadecameric（16） Consistent with all polymers
Chain F 1–127（127 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 3.60 Å
8P4B Structural insights into human co-transcriptional capping - structure 2 Deposited 2023-05-20 Assembly 1 Other combination Heteromer；Protein × 13 PDB declaration: hexadecameric（16） Consistent with all polymers
Chain F 1–127（127 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 3.20 Å
8P4C Structural insights into human co-transcriptional capping - structure 3 Deposited 2023-05-20 Assembly 1 Other combination Heteromer；Protein × 15 PDB declaration: octadecameric（18） Consistent with all polymers
Chain F 1–127（127 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 Assembly 1 Other combination Heteromer；Protein × 15 PDB declaration: octadecameric（18） Consistent with all polymers
Chain F 1–127（127 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 Assembly 1 Other combination Heteromer；Protein × 15 PDB declaration: octadecameric（18） Consistent with all polymers
Chain F 1–127（127 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 Assembly 1 Other combination Heteromer；Protein × 15 PDB declaration: octadecameric（18） Consistent with all polymers
Chain F 1–127（127 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

This page presents structural evidence recorded in PDB/mmCIF.“No recorded non-water small molecule” does not prove that the experimental sample was ligand-free; experimental conditions belong to the PDB experiment, while ligands and copy counts are shown for each biological assembly.