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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：C3SSG2 New Search
46PDB entries
46Biological assembly
46chain/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
10QM E.coli 50S ribosomal subunit bound to compound 48a Deposited 2026-02-01 Assembly 1 Protein–RNA Heteromer；Protein × 29 PDB declaration: 31-meric（31） Consistent with all polymers
Chain Z 1–103（103 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions Resolution 2.49 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 Z 1–103（103 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 BV 1–103（103 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
8FZD Cryo-EM structure of an E. coli non-rotated ribosome termination complex bound with apoRF3, RF1, P- and E-site tRNAPhe (Composite state I-B) Deposited 2023-01-28 Assembly 1 Protein–RNA Heteromer；Protein × 53 PDB declaration: 59-meric（59） Consistent with all polymers
Chain T 1–103（103 aa）
Not recorded MG MAGNESIUM ION × 581 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 3.10 Å
8FZE Cryo-EM structure of an E. coli non-rotated ribosome termination complex bound with RF1, P- and E-site tRNAPhe (State I-A) Deposited 2023-01-28 Assembly 1 Protein–RNA Heteromer；Protein × 52 PDB declaration: 58-meric（58） Consistent with all polymers
Chain T 1–103（103 aa）
Not recorded MG MAGNESIUM ION × 570 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 3.00 Å
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 T 1–103（103 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
8FZG Cryo-EM structure of an E. coli non-rotated ribosome termination complex bound with RF3-GDPCP, RF1, P- and E-site tRNAPhe (Composite state II-A) Deposited 2023-01-28 Assembly 1 Protein–RNA Heteromer；Protein × 53 PDB declaration: 59-meric（59） Consistent with all polymers
Chain T 1–103（103 aa）
Not recorded MG MAGNESIUM ION × 428 GCP PHOSPHOMETHYLPHOSPHONIC ACID GUANYLATE ESTER × 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 3.10 Å
8FZH Cryo-EM structure of an E. coli non-rotated ribosome termination complex bound with RF1, P- and E-site tRNAPhe (State II-D) Deposited 2023-01-28 Assembly 1 Protein–RNA Heteromer；Protein × 52 PDB declaration: 58-meric（58） Consistent with all polymers
Chain T 1–103（103 aa）
Not recorded MG MAGNESIUM ION × 595 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 2.90 Å
8FZI Cryo-EM structure of an E. coli rotated ribosome bound with RF3-GDPCP and p/E-tRNAPhe (Composite state II-B) Deposited 2023-01-28 Assembly 1 Protein–RNA Heteromer；Protein × 51 PDB declaration: 56-meric（56） Consistent with all polymers
Chain T 1–103（103 aa）
Not recorded MG MAGNESIUM ION × 737 GCP PHOSPHOMETHYLPHOSPHONIC ACID GUANYLATE ESTER × 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 3.10 Å
8FZJ Cryo-EM structure of an E. coli rotated ribosome bound with RF3-GDPCP and p/E-tRNAPhe (Composite state II-C) Deposited 2023-01-28 Assembly 1 Protein–RNA Heteromer；Protein × 51 PDB declaration: 56-meric（56） Consistent with all polymers
Chain T 1–103（103 aa）
Not recorded MG MAGNESIUM ION × 757 GCP PHOSPHOMETHYLPHOSPHONIC ACID GUANYLATE ESTER × 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 3.00 Å
8G38 Time-resolved cryo-EM study of the 70S recycling by the HflX:3rd Intermediate Deposited 2023-02-07 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 52-meric（52） Consistent with all polymers
Chain R 1–103（103 aa）
Not recorded GTP GUANOSINE-5'-TRIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
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 R 1–103（103 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 0 1–103（103 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 R 1–103（103 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 R 1–103（103 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
8UXB E. coli 70S ribosome with unmodified P/E-tRNAPro(GGG) bound to slippery P-site CCC-C codon Deposited 2023-11-09 Assembly 1 Protein–RNA Heteromer；Protein × 48 PDB declaration: 53-meric（53） Consistent with all polymers
Chain R 1–103（103 aa）
Not recorded MG MAGNESIUM ION × 287 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.90 Å
8UZ3 E. coli 70S ribosome with unmodified e*/E-tRNAPro(GGG) bound to slippery P-site CCC-C codon Deposited 2023-11-14 Assembly 1 Protein–RNA Heteromer；Protein × 48 PDB declaration: 53-meric（53） Consistent with all polymers
Chain R 1–103（103 aa）
Not recorded MG MAGNESIUM ION × 415 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.20 Å
8UZG E. coli 70S ribosome with unmodified e*/E-tRNAPro(GGG) bound to slippery P-site CCC-C codon Deposited 2023-11-15 Assembly 1 Protein–RNA Heteromer；Protein × 48 PDB declaration: 53-meric（53） Consistent with all polymers
Chain R 1–103（103 aa）
Not recorded MG MAGNESIUM ION × 398 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.70 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 R 1–103（103 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
8VKV Escherichia coli transcription-translation coupled complex (TTC-B) containing mRNA with a 33 nt long spacer, ops signal, RfaH, NusA, and fMet-tRNAs in E-site and P-site Deposited 2024-01-10 Assembly 1 Other combination Heteromer；Protein × 60 PDB declaration: 68-meric（68） Consistent with all polymers
Chain 0 1–103（103 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 3.60 Å
8VL1 Escherichia coli transcription-translation loosely coupled complex (TTC-LC) containing mRNA with a 36 nt long spacer, ops signal, RfaH, NusA, and fMet-tRNAs in E-site and P-site Deposited 2024-01-11 Assembly 1 Other combination Heteromer；Protein × 60 PDB declaration: 68-meric（68） Consistent with all polymers
Chain 0 1–103（103 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 5.30 Å
8VOO Escherichia coli transcription-translation loosely coupled complex (TTC-LC) containing mRNA with a 39 nt long spacer, ops signal, RfaH, 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 0 1–103（103 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 3.40 Å
8VOP Escherichia coli transcription-translation coupled complex (TTC-B) containing mRNA with a 36 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 0 1–103（103 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 6.00 Å
8VOQ Escherichia coli transcription-translation loosely coupled complex (TTC-LC) containing mRNA with a 39 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 0 1–103（103 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 9.30 Å
8VOR Escherichia coli transcription-translation loosely coupled complex (TTC-LC) containing mRNA with a 51 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 0 1–103（103 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 3.60 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 0 1–103（103 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 L21 1–103（103 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 L21 1–103（103 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
8VUP E. coli 70S ribosome with unmodified tRNAPro(GGG) in the e*/E conformation on a slippery CCC-C codon Deposited 2024-01-29 Assembly 1 Protein–RNA Heteromer；Protein × 48 PDB declaration: 53-meric（53） Consistent with all polymers
Chain R 1–103（103 aa）
Not recorded MG MAGNESIUM ION × 239 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.40 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 R 1–103（103 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 R 1–103（103 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 R 1–103（103 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 q 1–103（103 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
9AX8 70S initiation complex (tRNA-fMet M1, initiation factor 2 + CUG start codon) Deposited 2024-03-06 Assembly 1 Protein–RNA Heteromer；Protein × 48 PDB declaration: 53-meric（53） Consistent with all polymers
Chain R 1–103（103 aa）
Not recorded MG MAGNESIUM ION × 287 GCP PHOSPHOMETHYLPHOSPHONIC ACID GUANYLATE ESTER × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.60 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 BR 1–103（103 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 BR 1–103（103 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 BR 1–103（103 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 q 1–103（103 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 q 1–103（103 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 q 1–103（103 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 q 1–103（103 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
9DYG iSAT-PNA-RA20, RA20-B-c class Deposited 2024-10-14 Assembly 1 Protein–RNA Heteromer；Protein × 13 PDB declaration: tetradecameric（14） Consistent with all polymers
Chain R 1–103（103 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；Most of the sucrose was removed by spin concentration.
cryo-EM vitrification conditions Cryogen ETHANE；3 microliter of the sample was added.
Resolution 5.27 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 q 1–103（103 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 q 1–103（103 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 q 1–103（103 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 0 1–103（103 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.