3NDB image
Deposition Date 2010-06-07
Release Date 2011-02-23
Last Version Date 2024-03-13
Entry Detail
PDB ID:
3NDB
Keywords:
SIGNALING PROTEIN/RNA
Title:
Crystal structure of a signal sequence bound to the signal recognition particle
Biological Source:
Source Organism:
Methanocaldococcus jannaschii (Taxon ID: 2190)
Methanocaldococcus jannaschii DSM 2661 (Taxon ID: 243232)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
3.00 Å
R-Value Free:
0.26
R-Value Work:
0.22
R-Value Observed:
0.23
Space Group:
I 2 2 2
3NDB validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Signal recognition particle 19 kDa protein
Gene (Uniprot):srp19
Chain IDs:A
Chain Length:87
Number of Molecules:1
Biological Source:Methanocaldococcus jannaschii
UniProt ID:Q58440 Pfam ID:PF01922
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Signal recognition 54 kDa protein
Gene (Uniprot):srp54
Chain IDs:B
Chain Length:454
Number of Molecules:1
Biological Source:Methanocaldococcus jannaschii
UniProt ID:Q57565 Pfam ID:PF02881, PF00448, PF02978
Polymer Type:polyribonucleotide
Molecule:SRP RNA
Chain IDs:C (auth: M)
Chain Length:136
Number of Molecules:1
Biological Source:Methanocaldococcus jannaschii DSM 2661
Ligand Molecules
PO4
Primary Citation
Structural basis of signal-sequence recognition by the signal recognition particle.
Nat.Struct.Mol.Biol. 18 389 391 (2011)
PMID: 21336278 DOI: 10.1038/nsmb.1994

Abstact

The signal recognition particle (SRP) recognizes and binds the signal sequence of nascent proteins as they emerge from the ribosome. We present here the 3.0-Å structure of a signal sequence bound to the Methanococcus jannaschii SRP core. Structural comparison with the free SRP core shows that signal-sequence binding induces formation of the GM-linker helix and a 180° flip of the NG domain-structural changes that ensure a hierarchical succession of events during protein targeting.

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Disease

Primary Citation of related structures
2V3C