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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：P18962 New Search
3PDB entries
3Biological assembly
3chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification 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
3KL4 Recognition of a signal peptide by the signal recognition particle Deposited 2009-11-06 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 26–51（26 aa） Fragment：UNP residues 26-51
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 5.5；295 K；5-7 % PEG 4000, 100 mM Bis-Tris, 100 mM NaCl, 5-50 mM Mg(OAc)2, 2 % Polypropylene glycol P400. Crystals were obtained by seeding, pH 5.5, VAPOR DIFFUSION, temperature 295K
Resolution 3.50 Å R-free 0.322
3ZN8 Structural Basis of Signal Sequence Surveillance and Selection by the SRP-SR Complex Deposited 2013-02-13 Assembly 1 Protein–RNA Heteromer；Protein × 4 PDB declaration: pentameric（5） Consistent with all polymers
Chain S 31–44（14 aa） Fragment：RESIDUES 31-44
Not recorded MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer 50 MM HEPES-KOH, 100 MM KOAC, 8 MM MG(OAC)2, PH 7.5；pH 7.5；50 MM HEPES-KOH, 100 MM KOAC, 8 MM MG(OAC)2, PH 7.5
cryo-EM vitrification conditions Cryogen NITROGEN；THE GRIDS WERE PLUNGE FROZEN IN LIQUID ETHANE USING A FEI MARK IV VITRIFICATION ROBOT AFTER BLOTTING FOR 1 S AT RT AND 100 PER CENT RELATIVE HUMIDITY
Resolution 12.00 Å
7OBR RNC-SRP early complex Deposited 2021-04-23 Assembly 1 Protein–RNA Heteromer；Protein × 49 PDB declaration: 53-meric（53） Consistent with all polymers
Chain s 24–90（67 aa）
Not recorded MG MAGNESIUM ION × 97 ZN ZINC ION × 5 GDP GUANOSINE-5'-DIPHOSPHATE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE-PROPANE
Resolution 2.80 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.