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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：C3SIA7 New Search
13PDB entries
13Biological assembly
13chain/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
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 I 2–1341（1340 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 I 2–1341（1340 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
8G8Z Cryo-EM structure of 3DVA component 1 of Escherichia coli que-PEC (paused elongation complex) RNA Polymerase plus preQ1 ligand Deposited 2023-02-20 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: octameric（8） Consistent with all polymers
Chain I 2–1341（1340 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 C.
Resolution 4.30 Å
8T00 Reconstituted E. coli RNA polymerase post-termination complex on negatively-supercoiled DNA: closed duplex DNA (rPTCc) Deposited 2023-05-31 Assembly 1 Protein–DNA Heteromer；Protein × 4 PDB declaration: hexameric（6） Consistent with all polymers
Chain I 2–1341（1340 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.69 Å
8T0L E. coli Sw2/Snf2 ATPase RapA bound to both ADP-AlF3 and reconstituted E. coli RNA polymerase post-termination complex on negatively-supercoiled DNA Deposited 2023-06-01 Assembly 1 Protein–DNA Heteromer；Protein × 6 PDB declaration: octameric（8） Consistent with all polymers
Chain I 2–1341（1340 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 1 AF3 ALUMINUM FLUORIDE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.62 Å
9DR1 E. coli RNA polymerase consensus volume with a bound fluoride riboswitch in the ligand-bound state Deposited 2024-09-24 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: octameric（8） Consistent with all polymers
Chain I 2–1341（1340 aa）
Not recorded MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；5 mM Tris-HCl, pH 7.5, 100 mM KCl, 1 mM MgCl2
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.70 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 A 1–1342（1342 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 A 1–1342（1342 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
9N07 Mfd-bound E.coli RNA polymerase elongation complex + ADP-BeF3 - L1 state Deposited 2025-01-23 Assembly 1 Other combination Heteromer；Protein × 6 PDB declaration: nonameric（9） Consistent with all polymers
Chain I 2–1341（1340 aa）
Not recorded ADP ADENOSINE-5'-DIPHOSPHATE × 1 BEF BERYLLIUM TRIFLUORIDE ION × 1 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.48 Å
9N11 Mfd-bound E.coli RNA polymerase elongation complex + ADP-BeF3 - L1.5 state Deposited 2025-01-24 Assembly 1 Other combination Heteromer；Protein × 6 PDB declaration: nonameric（9） Consistent with all polymers
Chain I 2–1341（1340 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.29 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 C 1–1342（1342 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 C 1–1342（1342 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 C 1–1342（1342 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.