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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：C4R370 New Search
24PDB entries
24Biological assembly
24chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification 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
5XON RNA Polymerase II elongation complex bound with Spt4/5 and TFIIS Deposited 2017-05-29 Assembly 1 Other combination Heteromer；Protein × 15 PDB declaration: octadecameric（18） Consistent with all polymers
Chain W 206–815（610 aa） Fragment：UNP residues 206-815
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 3.83 Å
6IR9 RNA polymerase II elongation complex bound with Elf1 and Spt4/5, stalled at SHL(-1) of the nucleosome Deposited 2018-11-12 Assembly 1 Other combination Heteromer；Protein × 23 PDB declaration: 26-meric（26） Consistent with all polymers
Chain W 1–908（908 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 3.80 Å
6J4W RNA polymerase II elongation complex bound with Elf1 and Spt4/5, stalled at SHL(-5) of the nucleosome Deposited 2019-01-10 Assembly 1 Other combination Heteromer；Protein × 23 PDB declaration: 26-meric（26） Consistent with all polymers
Chain W 1–908（908 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 7.90 Å
6J4X RNA polymerase II elongation complex bound with Elf1 and Spt4/5, stalled at SHL(-1) of the nucleosome (+1A) Deposited 2019-01-10 Assembly 1 Other combination Heteromer；Protein × 23 PDB declaration: 26-meric（26） Consistent with all polymers
Chain W 1–908（908 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 4.30 Å
6J4Y RNA polymerase II elongation complex bound with Elf1 and Spt4/5, stalled at SHL(-1) of the nucleosome (+1B) Deposited 2019-01-10 Assembly 1 Other combination Heteromer；Protein × 23 PDB declaration: 26-meric（26） Consistent with all polymers
Chain W 1–908（908 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 4.30 Å
6J4Z RNA polymerase II elongation complex bound with Spt4/5 and foreign DNA, stalled at SHL(-1) of the nucleosome Deposited 2019-01-10 Assembly 1 Other combination Heteromer；Protein × 22 PDB declaration: 27-meric（27） Consistent with all polymers
Chain W 1–908（908 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 4.10 Å
6J50 RNA polymerase II elongation complex bound with Spt4/5 and foreign DNA, stalled at SHL(-1) of the nucleosome (tilted conformation) Deposited 2019-01-10 Assembly 1 Other combination Heteromer；Protein × 22 PDB declaration: 27-meric（27） Consistent with all polymers
Chain W 1–908（908 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 4.70 Å
6J51 RNA polymerase II elongation complex bound with Spt4/5 and foreign DNA, stalled at SHL(-1) of the nucleosome, weak Elf1 (+1 position) Deposited 2019-01-10 Assembly 1 Other combination Heteromer；Protein × 23 PDB declaration: 28-meric（28） Consistent with all polymers
Chain W 1–908（908 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 4.20 Å
7WBW RNA polymerase II elongation complex bound with Elf1 and Spt4/5, stalled at SHL(-3.5) of the nucleosome Deposited 2021-12-17 Assembly 1 Other combination Heteromer；Protein × 23 PDB declaration: 26-meric（26） Consistent with all polymers
Chain W 1–908（908 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 7.10 Å
7WBX RNA polymerase II elongation complex bound with Elf1 and Spt4/5, stalled at SHL(-3) of the nucleosome Deposited 2021-12-17 Assembly 1 Other combination Heteromer；Protein × 23 PDB declaration: 26-meric（26） Consistent with all polymers
Chain W 1–908（908 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 4.00 Å
7XN7 RNA polymerase II elongation complex containing Spt4/5, Elf1, Spt6, Spn1 and Paf1C Deposited 2022-04-28 Assembly 1 Other combination Heteromer；Protein × 22 PDB declaration: 25-meric（25） Consistent with all polymers
Chain W 1–908（908 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 3.10 Å
7XSE RNA polymerase II elongation complex transcribing a nucleosome (EC42) Deposited 2022-05-13 Assembly 1 Other combination Heteromer；Protein × 30 PDB declaration: 33-meric（33） Consistent with all polymers
Chain W 1–908（908 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 3.60 Å
7XSX RNA polymerase II elongation complex transcribing a nucleosome (EC49) Deposited 2022-05-15 Assembly 1 Other combination Heteromer；Protein × 32 PDB declaration: 35-meric（35） Consistent with all polymers
Chain W 1–908（908 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 3.80 Å
7XSZ RNA polymerase II elongation complex transcribing a nucleosome (EC115) Deposited 2022-05-15 Assembly 1 Other combination Heteromer；Protein × 30 PDB declaration: 33-meric（33） Consistent with all polymers
Chain W 1–908（908 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 3.40 Å
7XT7 RNA polymerase II elongation complex transcribing a nucleosome (EC49B) Deposited 2022-05-16 Assembly 1 Other combination Heteromer；Protein × 32 PDB declaration: 35-meric（35） Consistent with all polymers
Chain W 1–908（908 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 4.20 Å
7XTD RNA polymerase II elongation complex transcribing a nucleosome (EC58oct) Deposited 2022-05-16 Assembly 1 Other combination Heteromer；Protein × 32 PDB declaration: 35-meric（35） Consistent with all polymers
Chain W 1–908（908 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 3.90 Å
7XTI RNA polymerase II elongation complex transcribing a nucleosome (EC58hex) Deposited 2022-05-17 Assembly 1 Other combination Heteromer；Protein × 30 PDB declaration: 33-meric（33） Consistent with all polymers
Chain W 1–908（908 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 3.90 Å
8JH2 RNA polymerase II elongation complex bound with Elf1, Spt4/5 and foreign DNA, stalled at SHL(-1) of the nucleosome Deposited 2023-05-22 Assembly 1 Other combination Heteromer；Protein × 23 PDB declaration: 28-meric（28） Consistent with all polymers
Chain W 1–908（908 aa）
Not recorded ZN ZINC ION × 10 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；20 mM HEPES-KOH(pH7.5), 50 mM Potassium acetate, 200 nM Zinc acetate, 0.1 mM TCEP-HCl
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 5.70 Å
9II7 RNA polymerase II elongation complex stalled at SHL(-1) of the nucleosome containing histone variant H2A.B Deposited 2024-06-19 Assembly 1 Other combination Heteromer；Protein × 21 PDB declaration: 24-meric（24） Consistent with all polymers
Chain W 1–908（908 aa）
Not recorded ZN ZINC ION × 10 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；20 mM HEPES-KOH(pH7.5), 200 nM Zinc acetate, 0.1 mM TCEP-HCl
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.50 Å
9WMS Co-transcriptional histone H3K36 methylation complex containing RNA polymerase II elongation complex, Set2, and the upstream nucleosome. (temp115, type B) Deposited 2025-09-03 Assembly 1 Other combination Heteromer；Protein × 31 PDB declaration: 34-meric（34） Consistent with all polymers
Chain W 1–908（908 aa）
Not recorded ZN ZINC ION × 13 MG MAGNESIUM ION × 1 SAH S-ADENOSYL-L-HOMOCYSTEINE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.40 Å
9WMT Co-transcriptional histone H3K36 methylation complex containing RNA polymerase II elongation complex, Set2, and the upstream nucleosome. (temp115, type A) Deposited 2025-09-03 Assembly 1 Other combination Heteromer；Protein × 31 PDB declaration: 34-meric（34） Consistent with all polymers
Chain W 1–908（908 aa）
Not recorded ZN ZINC ION × 13 MG MAGNESIUM ION × 1 SAH S-ADENOSYL-L-HOMOCYSTEINE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.59 Å
9WMU Co-transcriptional histone H3K36 methylation complex containing RNA polymerase II elongation complex, Set2, and the upstream nucleosome. (temp130, type A) Deposited 2025-09-03 Assembly 1 Other combination Heteromer；Protein × 31 PDB declaration: 34-meric（34） Consistent with all polymers
Chain W 1–908（908 aa）
Not recorded ZN ZINC ION × 13 MG MAGNESIUM ION × 1 SAH S-ADENOSYL-L-HOMOCYSTEINE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.28 Å
9WMV Co-transcriptional histone H3K36 methylation complex containing RNA polymerase II elongation complex, Set2, and the upstream nucleosome. (temp130, type B) Deposited 2025-09-03 Assembly 1 Other combination Heteromer；Protein × 31 PDB declaration: 34-meric（34） Consistent with all polymers
Chain W 1–908（908 aa）
Not recorded ZN ZINC ION × 13 MG MAGNESIUM ION × 1 SAH S-ADENOSYL-L-HOMOCYSTEINE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.66 Å
9WMW Co-transcriptional histone H3K36 methylation complex containing RNA polymerase II elongation complex, Set2, and the upstream nucleosome. (temp115, FACT-hexamer) Deposited 2025-09-03 Assembly 1 Other combination Heteromer；Protein × 31 PDB declaration: 34-meric（34） Consistent with all polymers
Chain W 1–908（908 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 3.62 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.