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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：Q9H2K0 New Search
8PDB entries
8Biological assembly
8chain/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
6NEQ Structure of human mitochondrial translation initiation factor 3 bound to the small ribosomal subunit-Class-II Deposited 2018-12-18 Assembly 1 Protein–RNA Heteromer；Protein × 31 PDB declaration: 32-meric（32） Consistent with all polymers
Chain z 32–278（247 aa） Fragment：residues 32-278
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.32 Å
6NF8 Structure of human mitochondrial translation initiation factor 3 bound to the small ribosomal subunit -Class I Deposited 2018-12-19 Assembly 1 Protein–RNA Heteromer；Protein × 31 PDB declaration: 32-meric（32） Consistent with all polymers
Chain z 32–278（247 aa） Fragment：residues 32-278
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.48 Å
6RW4 Structure of human mitochondrial 28S ribosome in complex with mitochondrial IF3 Deposited 2019-06-03 Assembly 1 Protein–RNA Heteromer；Protein × 31 PDB declaration: 32-meric（32） Consistent with all polymers
Chain 8 1–278（278 aa）
Not recorded NAD NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 1 SPM SPERMINE × 1 SRY STREPTOMYCIN × 1 MG MAGNESIUM ION × 60 K POTASSIUM ION × 17 ZN ZINC ION × 1 FES FE2/S2 (INORGANIC) CLUSTER × 2 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 GNP PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.97 Å
6RW5 Structure of human mitochondrial 28S ribosome in complex with mitochondrial IF2 and IF3 Deposited 2019-06-03 Assembly 1 Protein–RNA Heteromer；Protein × 32 PDB declaration: 33-meric（33） Consistent with all polymers
Chain 8 1–278（278 aa）
Not recorded NAD NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 1 SPM SPERMINE × 1 SRY STREPTOMYCIN × 1 MG MAGNESIUM ION × 61 K POTASSIUM ION × 17 ZN ZINC ION × 1 FES FE2/S2 (INORGANIC) CLUSTER × 2 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 GNP PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.14 Å
7P2E Human mitochondrial ribosome small subunit in complex with IF3, GMPPMP and streptomycin Deposited 2021-07-05 Assembly 1 Protein–RNA Heteromer；Protein × 31 PDB declaration: 32-meric（32） Consistent with all polymers
Chain 8 1–278（278 aa）
Not recorded NAD NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 1 SPM SPERMINE × 1 5I0 [(2~{S},3~{S},4~{S},5~{R},6~{S})-2-[(2~{R},3~{R},4~{R},5~{S})-2-[(1~{R},2~{S},3~{R},4~{R},5~{S},6~{R})-2,4-bis[[azaniumylidene(azanyl)methyl]amino]-3,5,6-tris(oxidanyl)cyclohexyl]oxy-4-[bis(oxidanyl)methyl]-5-methyl-4-oxidanyl-oxolan-3-yl]oxy-6-(hydroxymethyl)-4,5-bis(oxidanyl)oxan-3-yl]-methyl-azanium × 1 K POTASSIUM ION × 21 MG MAGNESIUM ION × 62 ZN ZINC ION × 1 FES FE2/S2 (INORGANIC) CLUSTER × 2 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 GNP PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.40 Å
8QRM mt-SSU assembly intermediate in GTPBP8 knock-out cells, state 3 Deposited 2023-10-09 Assembly 1 Protein–RNA Heteromer；Protein × 31 PDB declaration: 32-meric（32） Consistent with all polymers
Chain 8 1–278（278 aa）
Not recorded NAD NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 1 SPM SPERMINE × 1 SRY STREPTOMYCIN × 1 MG MAGNESIUM ION × 59 K POTASSIUM ION × 17 ZN ZINC ION × 1 FES FE2/S2 (INORGANIC) CLUSTER × 2 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 GNP PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.05 Å
9HFM Translation-initiation state of human mitochondrial ribosome small subunit (State D) Deposited 2024-11-18 Assembly 1 Protein–RNA Heteromer；Protein × 31 PDB declaration: 32-meric（32） Consistent with all polymers
Chain 8 1–278（278 aa）
Not recorded MG MAGNESIUM ION × 44 K POTASSIUM ION × 1 ZN ZINC ION × 1 FES FE2/S2 (INORGANIC) CLUSTER × 2 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 GDP GUANOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4；20mM HEPES-HCl, 100mM KCl, 20mM MgCl2, 0.02% DDM, 1mM PMSF, 1x protease-inhibitor mix, 0.5mM GMP-PNP
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
9HFN Translation-initiation state of human mitochondrial ribosome small subunit (State E) Deposited 2024-11-18 Assembly 1 Protein–RNA Heteromer；Protein × 32 PDB declaration: 33-meric（33） Consistent with all polymers
Chain 8 1–278（278 aa）
Not recorded MG MAGNESIUM ION × 45 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 K POTASSIUM ION × 1 ZN ZINC ION × 1 FES FE2/S2 (INORGANIC) CLUSTER × 2 GDP GUANOSINE-5'-DIPHOSPHATE × 1 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4；20mM HEPES-HCl, 100mM KCl, 20mM MgCl2, 0.02% DDM, 1mM PMSF, 1x protease-inhibitor mix, 0.5mM GMP-PNP
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.30 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.