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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：Q5E9B8 New Search
6PDB entries
6Biological assembly
6chain/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
5FLM Structure of transcribing mammalian RNA polymerase II Deposited 2015-10-26 Assembly 1 Other combination Heteromer；Protein × 12 PDB declaration: pentadecameric（15） Consistent with all polymers
Chain G 1–172（172 aa）
Not recorded ZN ZINC ION × 8 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer 150 MM NACL, 5 MM HEPES, 0.01 MM ZNCL2, 10 MM DTT；pH 7.25；150 MM NACL, 5 MM HEPES, 0.01 MM ZNCL2, 10 MM DTT
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.40 Å
5OIK Structure of an RNA polymerase II-DSIF transcription elongation complex Deposited 2017-07-18 Assembly 1 Other combination Heteromer；Protein × 14 PDB declaration: heptadecameric（17） Consistent with all polymers
Chain G 1–172（172 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
8QQ2 RNAPII elongation complex bound to RECQ5 Deposited 2023-10-03 Assembly 1 Other combination Heteromer；Protein × 13 PDB declaration: hexadecameric（16） Consistent with all polymers
Chain G 1–172（172 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-PROPANE
Resolution 4.20 Å
8QW8 In condensate RNAPII elongation complex bound to RECQ5 Deposited 2023-10-19 Assembly 1 Other combination Heteromer；Protein × 13 PDB declaration: hexadecameric（16） Consistent with all polymers
Chain G 1–172（172 aa）
Not recorded ZN ZINC ION × 7 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE-PROPANE
Resolution 7.70 Å
8QW9 RNAPII elongation complex bound to RECQ5_R502E Deposited 2023-10-19 Assembly 1 Other combination Heteromer；Protein × 13 PDB declaration: hexadecameric（16） Consistent with all polymers
Chain G 1–172（172 aa）
Not recorded ZN ZINC ION × 7 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE-PROPANE
Resolution 4.30 Å
9XGK Structure of mammalian RNA polymerase II stalled by Actinomycin D at the N-1 position. Deposited 2025-10-30 Assembly 1 Other combination Heteromer；Protein × 13 PDB declaration: hexadecameric（16） Consistent with all polymers
Chain G 1–172（172 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 2.53 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.