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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：Q8TQL8 New Search
4PDB entries
4Biological assembly
4chain/assembly records
Main Difference Dimensions in This Set
Different assembly state Different ligand/ion 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
9O17 Cryo-EM structure of Methanosarcina acetivorans 70S ribosome Deposited 2025-04-03 Assembly 1 Protein–RNA Heteromer；Protein × 55 PDB declaration: 58-meric（58） Consistent with all polymers
Chain AY 1–76（76 aa）
Not recorded MG MAGNESIUM ION × 51 ZN ZINC ION × 9 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.92 Å
9ZNF Cryo-EM structure of the Methanosarcina acetivorans 70S ribosome in complex with SriA and SriB Deposited 2025-12-12 Assembly 1 Protein–RNA Heteromer；Protein × 58 PDB declaration: 62-meric（62） Consistent with all polymers
Chain BY 1–76（76 aa）
Not recorded MG MAGNESIUM ION × 305 ZN ZINC ION × 11 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.03 Å
9ZNG Cryo-EM structure of the Methanosarcina acetivorans 70S ribosome in complex with SriD Deposited 2025-12-12 Assembly 1 Protein–RNA Heteromer；Protein × 57 PDB declaration: 61-meric（61） Consistent with all polymers
Chain BY 1–76（76 aa）
Not recorded MG MAGNESIUM ION × 314 ZN ZINC ION × 11 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.06 Å
9ZNI Cryo-EM structure of the Methanosarcina acetivorans 70S ribosome in complex with SriC and SriD Deposited 2025-12-12 Assembly 1 Protein–RNA Heteromer；Protein × 58 PDB declaration: 61-meric（61） Consistent with all polymers
Chain BY 1–76（76 aa）
Not recorded MG MAGNESIUM ION × 314 ZN ZINC ION × 11 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.89 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.