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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：C3SME7 New Search
35PDB entries
35Biological assembly
35chain/assembly records
Main Difference Dimensions in This Set
Different assembly state Different ligand/ion Different experimental method 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
11BQ Escherichia coli 70S ribosome containing an evolved 16S rRNA (EC-S3.5) Deposited 2026-02-16 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 53-meric（53） Consistent with all polymers
Chain 0 1–55（55 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 307 SPD SPERMIDINE × 14 SPM SPERMINE × 1 C CYTIDINE-5'-MONOPHOSPHATE × 1 G GUANOSINE-5'-MONOPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
11DG Chimeric Escherichia coli 70S ribosome containing an evolved Vibrio cholerae 16S rRNA (VC-S4.4) Deposited 2026-02-18 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 53-meric（53） Consistent with all polymers
Chain 0 1–55（55 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 272 SPD SPERMIDINE × 14 SPM SPERMINE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
11EL Chimeric Escherichia coli 70S ribosome containing an evolved 16S rRNA from Vibrio cholerae (VC-ST) Deposited 2026-02-19 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 53-meric（53） Consistent with all polymers
Chain 0 1–55（55 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 308 SPD SPERMIDINE × 16 SPM SPERMINE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.20 Å
11FV Chimeric Escherichia coli 70S ribosome containing an evolved 16S rRNA from Pseudomonas aeruginosa (PA-S3.3) Deposited 2026-02-21 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 52-meric（52） Consistent with all polymers
Chain j 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 307 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.90 Å
11GG Chimeric Escherichia coli 70S ribosome containing an evolved 16S rRNA from Pseudomonas aeruginosa (PA-ST) Deposited 2026-02-22 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 52-meric（52） Consistent with all polymers
Chain j 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 307 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.02 Å
4V85 Crystal Structure of Release Factor RF3 Trapped in the GTP State on a Rotated Conformation of the Ribosome. Deposited 2011-06-13 Assembly 1 Protein–RNA Heteromer；Protein × 55 PDB declaration: 59-meric（59） Consistent with all polymers
Chain B5 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 493 GNP PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；295 K；Tris Ac PH.7.0, 25-35 mM KCL, 6.1% PEG 20000, 1% glycerol, 50mM sucrose, VAPOR DIFFUSION, SITTING DROP, temperature 295K
Resolution 3.20 Å R-free 0.250
8FZF Cryo-EM structure of an E. coli rotated ribosome complex bound with RF3-ppGpp and p/E-tRNAPhe (Composite state I-C) Deposited 2023-01-28 Assembly 1 Protein–RNA Heteromer；Protein × 51 PDB declaration: 56-meric（56） Consistent with all polymers
Chain 5 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 384 G4P GUANOSINE-5',3'-TETRAPHOSPHATE × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4；5 mM Tris-HCl, 60 mM NH4Cl, 10 mM MgCl2, 6 mM B-mercaptoethanol
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.20 Å
8URM E. coli 70S ribosome with unmodified tRNAPro(GGG) bound to slippery P-site CCC-C codon and tRNAVal(UAC) in the A site Deposited 2023-10-26 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 55-meric（55） Consistent with all polymers
Chain c 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 395 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
8URY Escherichia coli transcription-translation coupled complex class B (TTC-B) containing RfaH bound to ops signal, NusA, mRNA with a 30 nt long spacer, and fMet-tRNA in E-site and P-site of the ribosome Deposited 2023-10-27 Assembly 1 Other combination Heteromer；Protein × 60 PDB declaration: 68-meric（68） Consistent with all polymers
Chain k 1–55（55 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
8UTJ E. coli 70S ribosome with unmodified lys-tRNAPro(GGG) bound to slippery P-site CCC-C codon in the 0 frame Deposited 2023-10-31 Assembly 1 Protein–RNA Heteromer；Protein × 50 PDB declaration: 55-meric（55） Consistent with all polymers
Chain c 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 530 LYS LYSINE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.50 Å
8UX8 E. coli 70S ribosome with unmodified Lys-tRNAPro(GGG) bound to slippery P-site CCC-C codon in the +1 mRNA reading frame Deposited 2023-11-09 Assembly 1 Protein–RNA Heteromer；Protein × 50 PDB declaration: 55-meric（55） Consistent with all polymers
Chain c 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 395 LYS LYSINE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.60 Å
8V03 E. coli 70S ribosome with unmodified P/E-tRNAPro(GGG) bound to slippery P-site CCC-C codon Deposited 2023-11-16 Assembly 1 Protein–RNA Heteromer；Protein × 48 PDB declaration: 53-meric（53） Consistent with all polymers
Chain c 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 281 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.00 Å
8VOS Escherichia coli transcription-translation loosely coupled complex (TTC-LC) containing mRNA with a 60 nt long spacer, NusG, NusA, and fMet-tRNAs in E-site and P-site Deposited 2024-01-15 Assembly 1 Other combination Heteromer；Protein × 60 PDB declaration: 68-meric（68） Consistent with all polymers
Chain k 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.60 Å
8VS9 Endogenous trans-translation complex with tmRNA*SmpB in the P site and alanyl-tRNA in the A site and deacyl-tRNA in the E site of E. coli 70S ribosome Deposited 2024-01-23 Assembly 1 Protein–RNA Heteromer；Protein × 53 PDB declaration: 59-meric（59） Consistent with all polymers
Chain L33 1–55（55 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.90 Å
8VSA Endogenous trans-translation complex with tmRNA*SmpB in the P site and alanyl-tRNA in the A site of E. coli 70S ribosome Deposited 2024-01-23 Assembly 1 Protein–RNA Heteromer；Protein × 53 PDB declaration: 58-meric（58） Consistent with all polymers
Chain L33 1–55（55 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.70 Å
8VV4 E. coli 70S ribosome with unmodified Lys-tRNAPro(GGG) in the P/P conformation on a slippery CCC-C codon Deposited 2024-01-30 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 54-meric（54） Consistent with all polymers
Chain c 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 424 LYS LYSINE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.40 Å
8VWQ E. coli 70S ribosome with unmodified Lys-tRNAPro(GGG) in the P/P conformation on a slippery CCC-C codon and Elongation Factor P bound (uL1 in the closed conformation) Deposited 2024-02-02 Assembly 1 Protein–RNA Heteromer；Protein × 51 PDB declaration: 56-meric（56） Consistent with all polymers
Chain c 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 586 LYS LYSINE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å
8W2N E. coli 70S ribosome with unmodified Lys-tRNAPro(GGG) in the P/P conformation on a slippery CCC-C codon and Elongation Factor P bound (uL1 in the open conformation) Deposited 2024-02-20 Assembly 1 Protein–RNA Heteromer；Protein × 50 PDB declaration: 55-meric（55） Consistent with all polymers
Chain c 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 481 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.20 Å
9AX7 70S initiation complex (tRNA-fMet M1 + CUG start codon) Deposited 2024-03-06 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 54-meric（54） Consistent with all polymers
Chain 0 1–55（55 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 309 IAS BETA-L-ASPARTIC ACID × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.63 Å
9B4Z E. coli 70S ribosome complex (N1-methylated 16S A1408 + arbekacin) Deposited 2024-03-21 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 56-meric（56） Consistent with all polymers
Chain B1 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 309 84G Arbekacin × 2 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.20 Å
9B50 E. coli 70S ribosome complex (unmethylated 16S A1408 + arbekacin) Deposited 2024-03-21 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 52-meric（52） Consistent with all polymers
Chain B1 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 309 84G Arbekacin × 2 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å
9B51 E. coli 70S ribosome complex (N1-methylated 16S A1408 + G418) Deposited 2024-03-21 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 56-meric（56） Consistent with all polymers
Chain B1 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 309 GET GENETICIN × 2 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.40 Å
9CG5 70S initiation complex (tRNA-fMet M1 + UUG start codon) Deposited 2024-06-28 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 54-meric（54） Consistent with all polymers
Chain 0 1–55（55 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 309 IAS BETA-L-ASPARTIC ACID × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.59 Å
9CG6 70S initiation complex (tRNA-fMet M1 + GUG start codon) Deposited 2024-06-28 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 54-meric（54） Consistent with all polymers
Chain 0 1–55（55 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 309 IAS BETA-L-ASPARTIC ACID × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.61 Å
9CG7 70S initiation complex (tRNA-fMet M1 + AUG start codon) Deposited 2024-06-28 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 54-meric（54） Consistent with all polymers
Chain 0 1–55（55 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 309 IAS BETA-L-ASPARTIC ACID × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.75 Å
9D89 E. coli 50S ribosomal subunit in complex with PrAMP rumicidin-2 (focused refinement) Deposited 2024-08-19 Assembly 1 Protein–RNA Heteromer；Protein × 29 PDB declaration: 31-meric（31） Consistent with all polymers
Chain 0 1–55（55 aa）
Not recorded ZN ZINC ION × 1 MG MAGNESIUM ION × 204 K POTASSIUM ION × 93 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 1.95 Å
9MKK Structure of arbekacin bound Escherichia coli 70S ribosome Deposited 2024-12-17 Assembly 1 Protein–RNA Heteromer；Protein × 47 PDB declaration: 52-meric（52） Consistent with all polymers
Chain 0 1–55（55 aa）
Not recorded 84G Arbekacin × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.20 Å
9MOR Damaged 70S ribosome with PrfH bound Deposited 2024-12-27 Assembly 1 Protein–RNA Heteromer；Protein × 52 PDB declaration: 58-meric（58） Consistent with all polymers
Chain c 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 439 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.65 Å
9MQ4 Damaged 70S ribosome with PrfH bound Deposited 2025-01-01 Assembly 1 Protein–RNA Heteromer；Protein × 52 PDB declaration: 58-meric（58） Consistent with all polymers
Chain c 1–55（55 aa）
Not recorded MG MAGNESIUM ION × 439 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.78 Å
9O2X Structure of WT E.coli ribosome 70S subunit with complexed with mRNA, P-site fMet-NH-tRNAfMet and A-site (S)-betahydroxyBocK charged NH-tRNAPyl Deposited 2025-04-04 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 55-meric（55） Consistent with all polymers
Chain 0 1–55（55 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 320 FME N-FORMYLMETHIONINE × 1 K POTASSIUM ION × 10 PAR PAROMOMYCIN × 1 SPD SPERMIDINE × 14 SPM SPERMINE × 1 A1B71 (2S)-6-[(tert-butoxycarbonyl)amino]-2-(hydroxymethyl)hexanoic acid × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.29 Å
9O2Y Structure of WT E.coli ribosome 70S subunit with complexed with mRNA, P-site fMet-NH-tRNAfMet and A-site (R) beta-2-hydroxy-BocLysine acid charged NH-tRNAPyl Deposited 2025-04-04 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 55-meric（55） Consistent with all polymers
Chain 0 1–55（55 aa）
Not recorded PAR PAROMOMYCIN × 1 MG MAGNESIUM ION × 320 SPD SPERMIDINE × 13 FME N-FORMYLMETHIONINE × 1 SPM SPERMINE × 1 K POTASSIUM ION × 10 ZN ZINC ION × 2 A1B70 (2R)-6-[(tert-butoxycarbonyl)amino]-2-(hydroxymethyl)hexanoic acid × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.14 Å
9PIH E. coli 70S ribosome bound to Doxycycline Deposited 2025-07-10 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 54-meric（54） Consistent with all polymers
Chain 0 1–55（55 aa）
Not recorded ZN ZINC ION × 1 MG MAGNESIUM ION × 276 K POTASSIUM ION × 92 DXT (4S,4AR,5S,5AR,6R,12AS)-4-(DIMETHYLAMINO)-3,5,10,12,12A-PENTAHYDROXY-6-METHYL-1,11-DIOXO-1,4,4A,5,5A,6,11,12A-OCTAHYDROTETRACENE-2-CARBOXAMIDE × 6 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.40 Å
9PII E. coli 70S ribosome bound to Sarecycline Deposited 2025-07-10 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 54-meric（54） Consistent with all polymers
Chain 0 1–55（55 aa）
Not recorded ZN ZINC ION × 1 MG MAGNESIUM ION × 281 K POTASSIUM ION × 100 V7A Sarecycline × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.40 Å
9PIJ E. coli 70S ribosome bound to Minocycline Deposited 2025-07-10 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 54-meric（54） Consistent with all polymers
Chain 0 1–55（55 aa）
Not recorded ZN ZINC ION × 1 MG MAGNESIUM ION × 340 K POTASSIUM ION × 148 MIY (4S,4AS,5AR,12AS)-4,7-BIS(DIMETHYLAMINO)-3,10,12,12A-TETRAHYDROXY-1,11-DIOXO-1,4,4A,5,5A,6,11,12A-OCTAHYDROTETRACENE-2- CARBOXAMIDE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.20 Å
9Y79 Escherichia coli transcription-translation loosely coupled complex (TTC-LC^walked) containing mRNA with a 39 nt long spacer, NusG, NusA, and fMet-tRNAs in E-site and P-site Deposited 2025-09-09 Assembly 1 Other combination Heteromer；Protein × 60 PDB declaration: 68-meric（68） Consistent with all polymers
Chain k 1–55（55 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions Resolution 3.20 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.