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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：P24255 New Search
8PDB entries
8Biological assembly
8chain/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
8F1I SigN RNA polymerase early-melted intermediate bound to mismatch fragment dhsU36mm1 (-12T) Deposited 2022-11-05 Assembly 1 Protein–DNA Heteromer；Protein × 6 PDB declaration: decameric（10） Consistent with all polymers
Chain M 1–477（477 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 3.00 Å
8F1J SigN RNA polymerase early-melted intermediate bound to mismatch DNA fragment dhsU36mm2 (-12A) Deposited 2022-11-05 Assembly 1 Protein–DNA Heteromer；Protein × 6 PDB declaration: decameric（10） Consistent with all polymers
Chain M 1–477（477 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 2.60 Å
8F1K SigN RNA polymerase early-melted intermediate bound to full duplex DNA fragment dhsU36 (-12T) Deposited 2022-11-05 Assembly 1 Protein–DNA Heteromer；Protein × 6 PDB declaration: decameric（10） Consistent with all polymers
Chain M 1–477（477 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 2.80 Å
9MSE de novo SigN RNA polymerase transcription initiation intermediate with pre-catalytic bEBP state (RPi1 open ring) Deposited 2025-01-09 Assembly 1 Protein–DNA Heteromer；Protein × 12 PDB declaration: 16-meric（16） Consistent with all polymers
Chain M 1–477（477 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 6 MG MAGNESIUM ION × 3 POP PYROPHOSPHATE 2- × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8；40 mM Tris-HCl, pH 8/RT, 200 mM KCl, 10 mM MgCl2, 1 mM DTT; fluorinated fos-choline-8 (FC8F) added to a final concentration of 1.5 mM during grid preparation
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å
9MSF de novo SigN RNA polymerase transcription initiation intermediate with post-catalytic bEBP state (RPi1 closed ring) Deposited 2025-01-09 Assembly 1 Protein–DNA Heteromer；Protein × 12 PDB declaration: 16-meric（16） Consistent with all polymers
Chain M 1–477（477 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 5 MG MAGNESIUM ION × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 1 POP PYROPHOSPHATE 2- × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8；40 mM Tris-HCl, pH 8/RT, 200 mM KCl, 10 mM MgCl2, 1 mM DTT; fluorinated fos-choline-8 (FC8F) added to a final concentration of 1.5 mM during grid preparation
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.60 Å
9MSG De novo SigN RNA polymerase transcription initiation intermediate with bound SigN-RII Deposited 2025-01-09 Assembly 1 Protein–DNA Heteromer；Protein × 12 PDB declaration: tetradecameric（14） Consistent with all polymers
Chain M 1–477（477 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 5 MG MAGNESIUM ION × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 1 POP PYROPHOSPHATE 2- × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8；40 mM Tris-HCl, pH 8/RT, 200 mM KCl, 10 mM MgCl2, 1 mM DTT; fluorinated fos-choline-8 (FC8F) added to a final concentration of 1.5 mM during grid preparation
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å
9MSH de novo SigN RNA polymerase open complex (RPo) Deposited 2025-01-09 Assembly 1 Protein–DNA Heteromer；Protein × 6 PDB declaration: octameric（8） Consistent with all polymers
Chain M 1–477（477 aa）
Not recorded POP PYROPHOSPHATE 2- × 1 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8；40 mM Tris-HCl, pH 8/RT, 200 mM KCl, 10 mM MgCl2, 1 mM DTT; fluorinated fos-choline-8 (FC8F) added to a final concentration of 1.5 mM during grid preparation
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.80 Å
9MSJ de novo SigN RNA polymerase NTP-bound open complex (RPo+2A) Deposited 2025-01-09 Assembly 1 Protein–DNA Heteromer；Protein × 6 PDB declaration: octameric（8） Consistent with all polymers
Chain M 1–477（477 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 ADP ADENOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 8；40 mM Tris-HCl, pH 8/RT, 200 mM KCl, 10 mM MgCl2, 1 mM DTT; fluorinated fos-choline-8 (FC8F) added to a final concentration of 1.5 mM during grid preparation
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 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.