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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：H4KQ39 New Search
5PDB entries
5Biological assembly
5chain/assembly records
Main Difference Dimensions in This Set
Different assembly state 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
6X7K Cryo-EM structure of an Escherichia coli coupled transcription-translation complex B3 (TTC-B3) containing an mRNA with a 24 nt long spacer, transcription factors NusA and NusG, and fMet-tRNAs at P-site and E-site Deposited 2020-05-30 Assembly 1 Other combination Heteromer；Protein × 60 PDB declaration: 68-meric（68） Consistent with all polymers
Chain Z 1–121（121 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å
6X9Q Cryo-EM structure of an Escherichia coli coupled transcription-translation complex B3 (TTC-B3) containing an mRNA with a 27 nt long spacer, transcription factors NusA and NusG, and fMet-tRNAs at P-site and E-site Deposited 2020-06-03 Assembly 1 Other combination Heteromer；Protein × 60 PDB declaration: 68-meric（68） Consistent with all polymers
Chain Z 1–121（121 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.80 Å
6XDQ Cryo-EM structure of an Escherichia coli coupled transcription-translation complex B3 (TTC-B3) containing an mRNA with a 30 nt long spacer, transcription factors NusA and NusG, and fMet-tRNAs at P-site and E-site Deposited 2020-06-11 Assembly 1 Other combination Heteromer；Protein × 60 PDB declaration: 68-meric（68） Consistent with all polymers
Chain Z 1–121（121 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.70 Å
6XDR Escherichia coli transcription-translation complex B (TTC-B) containing an 27 nt long mRNA spacer, NusG, and fMet-tRNAs at E-site and P-site Deposited 2020-06-11 Assembly 1 Other combination Heteromer；Protein × 59 PDB declaration: 67-meric（67） Consistent with all polymers
Chain Z 1–121（121 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.70 Å
6XGF Escherichia coli transcription-translation complex B (TTC-B) containing an 30 nt long mRNA spacer, NusG, and fMet-tRNAs at E-site and P-site Deposited 2020-06-17 Assembly 1 Other combination Heteromer；Protein × 59 PDB declaration: 67-meric（67） Consistent with all polymers
Chain Z 1–121（121 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 5.00 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.