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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：C3SIA2 New Search
27PDB entries
27Biological assembly
27chain/assembly records
Main Difference Dimensions in This Set
Different construct 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
6Z9P Transcription termination intermediate complex 1 Deposited 2020-06-04 Assembly 1 Other combination Heteromer；Protein × 13 PDB declaration: hexadecameric（16） Consistent with all polymers
Chain Y 1–1407（1407 aa）
Not recorded BEF BERYLLIUM TRIFLUORIDE ION × 5 ADP ADENOSINE-5'-DIPHOSPHATE × 5 MG MAGNESIUM ION × 6 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.90 Å
6Z9Q Transcription termination intermediate complex 2 Deposited 2020-06-04 Assembly 1 Other combination Heteromer；Protein × 13 PDB declaration: hexadecameric（16） Consistent with all polymers
Chain Y 1–1407（1407 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 5 MG MAGNESIUM ION × 6 BEF BERYLLIUM TRIFLUORIDE ION × 5 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 5.70 Å
6Z9R Transcription termination intermediate complex 3 Deposited 2020-06-04 Assembly 1 Other combination Heteromer；Protein × 13 PDB declaration: hexadecameric（16） Consistent with all polymers
Chain Y 1–1407（1407 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 5 MG MAGNESIUM ION × 6 BEF BERYLLIUM TRIFLUORIDE ION × 5 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.10 Å
6Z9S Transcription termination intermediate complex 4 Deposited 2020-06-04 Assembly 1 Other combination Heteromer；Protein × 12 PDB declaration: pentadecameric（15） Consistent with all polymers
Chain Y 1–1407（1407 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 5 MG MAGNESIUM ION × 6 BEF BERYLLIUM TRIFLUORIDE ION × 5 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.40 Å
6Z9T Transcription termination intermediate complex 5 Deposited 2020-06-04 Assembly 1 Other combination Heteromer；Protein × 12 PDB declaration: pentadecameric（15） Consistent with all polymers
Chain Y 1–1407（1407 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 5 MG MAGNESIUM ION × 6 BEF BERYLLIUM TRIFLUORIDE ION × 5 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.10 Å
7ADB Transcription termination intermediate complex 1 delta NusG Deposited 2020-09-14 Assembly 1 Other combination Heteromer；Protein × 12 PDB declaration: pentadecameric（15） Consistent with all polymers
Chain Y 1–1407（1407 aa）
Not recorded BEF BERYLLIUM TRIFLUORIDE ION × 5 ADP ADENOSINE-5'-DIPHOSPHATE × 5 MG MAGNESIUM ION × 6 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.40 Å
7ADC Transcription termination intermediate complex 3 delta NusG Deposited 2020-09-14 Assembly 1 Other combination Heteromer；Protein × 12 PDB declaration: pentadecameric（15） Consistent with all polymers
Chain Y 1–1407（1407 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 5 MG MAGNESIUM ION × 6 BEF BERYLLIUM TRIFLUORIDE ION × 5 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.00 Å
7ADD Transcription termination intermediate complex IIIa Deposited 2020-09-14 Assembly 1 Other combination Heteromer；Protein × 12 PDB declaration: pentadecameric（15） Consistent with all polymers
Chain Y 1–1407（1407 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 5 MG MAGNESIUM ION × 6 BEF BERYLLIUM TRIFLUORIDE ION × 5 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.30 Å
7ADE Transcription termination complex IVa Deposited 2020-09-14 Assembly 1 Other combination Heteromer；Protein × 12 PDB declaration: pentadecameric（15） Consistent with all polymers
Chain Y 1–1407（1407 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 5 MG MAGNESIUM ION × 6 BEF BERYLLIUM TRIFLUORIDE ION × 5 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.20 Å
8ABZ RNA polymerase at U-rich pause bound to non-regulatory RNA - pause prone, closed clamp state Deposited 2022-07-05 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: octameric（8） Consistent with all polymers
Chain D 1–1406（1406 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8；20 mM Tris-glutamate pH 8.0, 50 mM K-glutamate, 10 mM Mg-glutamate, 0.001 mM ZnCl2, 2mM DTT
cryo-EM vitrification conditions Cryogen ETHANE；Quantifoil UltrAuFoil R1.2/1.3 300 mesh holey gold grids were plasma cleaned on a Model 1070 (Fischione Instruments) for 30 sec at 70% power and with an 80% Argon and 20% Oxygen mixture prior to the application of 0.004 ml of sample. Grids were plunge frozen into liquid ethane using a Vitrobot mark IV (FEI) with 95% chamber humidity at 283K.
Resolution 3.40 Å
8EG7 Cryo-EM structure of pre-consensus elemental paused elongation complex Deposited 2022-09-11 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: octameric（8） Consistent with all polymers
Chain J 2–1407（1406 aa）
Not recorded 1N7 CHAPSO × 2 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE；blot force 0, blot time 3 s
Resolution 3.20 Å
8EG8 Cryo-EM structure of consensus elemental paused elongation complex with a folded TL Deposited 2022-09-12 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: octameric（8） Consistent with all polymers
Chain J 1–1406（1406 aa）
Not recorded 1N7 CHAPSO × 2 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE；blot force 0, blot time 3 s
Resolution 3.30 Å
8EGB Cryo-EM structure of consensus elemental paused elongation complex with an unfolded TL Deposited 2022-09-12 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: octameric（8） Consistent with all polymers
Chain J 2–1407（1406 aa）
Not recorded 1N7 CHAPSO × 2 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE；blot force 0, blot time 3 s
Resolution 3.80 Å
8EH8 Cryo-EM structure of his-elemental paused elongation complex with a folded TL and a rotated RH-FL (1) Deposited 2022-09-13 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: octameric（8） Consistent with all polymers
Chain J 2–1407（1406 aa）
Not recorded MG MAGNESIUM ION × 1 1N7 CHAPSO × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE；blot force 0, blot time 3.5 s
Resolution 3.40 Å
8EH9 Cryo-EM structure of his-elemental paused elongation complex with a folded TL and a rotated RH-FL (2) Deposited 2022-09-13 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: octameric（8） Consistent with all polymers
Chain J 2–1407（1406 aa）
Not recorded MG MAGNESIUM ION × 1 1N7 CHAPSO × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE；blot force 0, blot time 3.5 s
Resolution 3.90 Å
8EHA Cryo-EM structure of his-elemental paused elongation complex with a folded TL and a rotated RH-FL (out) Deposited 2022-09-14 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: octameric（8） Consistent with all polymers
Chain J 2–1407（1406 aa）
Not recorded MG MAGNESIUM ION × 1 1N7 CHAPSO × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE；blot force 0, blot time 3.5 s
Resolution 3.70 Å
8EHF Cryo-EM structure of his-elemental paused elongation complex with an unfolded TL (1) Deposited 2022-09-14 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: octameric（8） Consistent with all polymers
Chain J 2–1407（1406 aa）
Not recorded 4QM (3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-10,13-dimethyl-17-[(2R)-pentan-2-yl]-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,7,12-triol × 1 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE；blot force 0, blot time 3.5 s
Resolution 3.30 Å
8EHI Cryo-EM structure of his-elemental paused elongation complex with an unfolded TL (2) Deposited 2022-09-14 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: octameric（8） Consistent with all polymers
Chain J 2–1407（1406 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE；blot force 0, blot time 3.5 s
Resolution 5.50 Å
8F3C Cryo-EM consensus structure of Escherichia coli que-PEC (paused elongation complex) RNA Polymerase minus preQ1 ligand Deposited 2022-11-09 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: octameric（8） Consistent with all polymers
Chain J 1–1407（1407 aa）
Not recorded MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；VITRIFICATION WAS CARRIED OUT IN A CHAMBER WITH THE TEMPERATURE SET TO 4 DEGREES CELSIUS.
Resolution 3.40 Å
8G00 Cryo-EM structure of 3DVA component 0 of Escherichia coli que-PEC (paused elongation complex) RNA Polymerase minus preQ1 ligand Deposited 2023-01-31 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: octameric（8） Consistent with all polymers
Chain J 1–1407（1407 aa）
Not recorded MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；VITRIFICATION WAS CARRIED OUT IN A CHAMBER WITH THE TEMPERATURE SET TO 4 DEGREES CELSIUS.
Resolution 3.40 Å
8G2W Cryo-EM structure of 3DVA component 2 of Escherichia coli que-PEC (paused elongation complex) RNA Polymerase minus preQ1 ligand Deposited 2023-02-06 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: octameric（8） Consistent with all polymers
Chain J 16–1373（1358 aa）
Not recorded MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；VITRIFICATION WAS CARRIED OUT IN A CHAMBER WITH THE TEMPERATURE SET TO 4 DEGREES CELSIUS.
Resolution 3.70 Å
8G4W Cryo-EM consensus structure of Escherichia coli que-PEC (paused elongation complex) RNA Polymerase plus preQ1 ligand Deposited 2023-02-10 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: octameric（8） Consistent with all polymers
Chain J 16–1373（1358 aa）
Not recorded PRF 7-DEAZA-7-AMINOMETHYL-GUANINE × 1 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；VITRIFICATION WAS CARRIED OUT IN A CHAMBER WITH THE TEMPERATURE SET TO 4 DEGREES CELSIUS.
Resolution 3.80 Å
9M7Y Cryo-EM structure of gp79-dependent RNAP promoter open complex Deposited 2025-03-11 Assembly 1 Protein–DNA Heteromer；Protein × 7 PDB declaration: nonameric（9） Consistent with all polymers
Chain B 1–1407（1407 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.40 Å
9M7Z Cryo-EM structure of gp79 bound RNAP core enzyme Deposited 2025-03-11 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain B 1–1407（1407 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 5.50 Å
9W3D Cryo-EM structure of E. coli RNA polymerase in complex with EP1 Deposited 2025-07-29 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain D 1–1407（1407 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.00 Å
9W3E Cryo-EM structure of E. coli RNA polymerase in complex with PP1 Deposited 2025-07-29 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain D 1–1407（1407 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.60 Å
9W3G Cryo-EM structure of E. coli RNA polymerase in complex with VP1 Deposited 2025-07-29 Assembly 1 Protein heterocomplex Heteromer；Protein × 7 PDB declaration: heptameric（7） Consistent with protein count
Chain D 1–1407（1407 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.30 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.