2GO5 image
Deposition Date 2006-04-12
Release Date 2006-06-13
Last Version Date 2024-10-09
Entry Detail
PDB ID:
2GO5
Keywords:
TRANSLATION/RNA
Title:
Structure of signal recognition particle receptor (SR) in complex with signal recognition particle (SRP) and ribosome nascent chain complex
Biological Source:
Source Organism:
Canis sp. (Taxon ID: 9616)
Homo sapiens (Taxon ID: 9606)
Mus musculus (Taxon ID: 10090)
Triticum sp. (Taxon ID: 4569)
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
7.40 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
2GO5 validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Signal recognition particle receptor alpha subunit (SR a)
Gene (Uniprot):SRPRA
Chain IDs:E (auth: 1)
Chain Length:185
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P08240 Pfam ID:PF04086 EC:3.6.5.4
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Signal recognition particle receptor beta subunit (SR b)
Gene (Uniprot):Srprb
Chain IDs:F (auth: 2)
Chain Length:214
Number of Molecules:1
Biological Source:Mus musculus
UniProt ID:P47758 Pfam ID:PF09439 EC:3.6.5.4
Protein Blast
Polymer Type:polypeptide(L)
Molecule:ribosomal protein L23
Chain IDs:H (auth: 4)
Chain Length:152
Number of Molecules:1
Biological Source:Triticum sp.
UniProt ID:O81229 Pfam ID:PF00276
Protein Blast
Polymer Type:polypeptide(L)
Molecule:ribosomal protein L35
Gene (Uniprot):RPL35
Chain IDs:G (auth: 5)
Chain Length:124
Number of Molecules:1
Biological Source:Triticum sp.
UniProt ID:Q8L805 Pfam ID:PF00831
Protein Blast
Polymer Type:polypeptide(L)
Molecule:ribosomal protein L31
Chain IDs:I (auth: 6)
Chain Length:123
Number of Molecules:1
Biological Source:Triticum sp.
UniProt ID:Q5XLD9 Pfam ID:PF01198
Polymer Type:polyribonucleotide
Molecule:ribosomal RNA
Chain IDs:B (auth: 9)
Chain Length:90
Number of Molecules:1
Biological Source:Triticum sp.
Polymer Type:polyribonucleotide
Molecule:SRP RNA
Chain IDs:A
Chain Length:127
Number of Molecules:1
Biological Source:Canis sp.
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Signal recognition particle 19 kDa protein (SRP19)
Chain IDs:C (auth: B)
Chain Length:108
Number of Molecules:1
Biological Source:Canis sp.
UniProt ID:Q5RBR1 Pfam ID:PF01922
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Signal recognition particle 54 kDa protein (SRP54)
Gene (Uniprot):SRP54
Chain IDs:D (auth: W)
Chain Length:109
Number of Molecules:1
Biological Source:Canis sp.
UniProt ID:P61010 Pfam ID:PF02978 EC:3.6.5.4
Ligand Molecules
NA
Primary Citation
Signal Recognition Particle Receptor Exposes the Ribosomal Translocon Binding Site
Science 312 745 747 (2006)
PMID: 16675701 DOI: 10.1126/science.1124864

Abstact

Signal sequences of secretory and membrane proteins are recognized by the signal recognition particle (SRP) as they emerge from the ribosome. This results in their targeting to the membrane by docking with the SRP receptor, which facilitates transfer of the ribosome to the translocon. Here, we present the 8 angstrom cryo-electron microscopy structure of a "docking complex" consisting of a SRP-bound 80S ribosome and the SRP receptor. Interaction of the SRP receptor with both SRP and the ribosome rearranged the S domain of SRP such that a ribosomal binding site for the translocon, the L23e/L35 site, became exposed, whereas Alu domain-mediated elongation arrest persisted.

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Primary Citation of related structures
2GO5