2V3C

Crystal structure of the SRP54-SRP19-7S.S SRP RNA complex of M. jannaschii


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.244 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Interaction of Signal-Recognition Particle 54 Gtpase Domain and Signal-Recognition Particle RNA in the Free Signal-Recognition Particle.

Hainzl, T.Huang, S.Sauer-Eriksson, A.E.

(2007) Proc.Natl.Acad.Sci.USA 104: 14911

  • DOI: 10.1073/pnas.0702467104

  • PubMed Abstract: 
  • The signal-recognition particle (SRP) is a ubiquitous protein-RNA complex that targets proteins to cellular membranes for insertion or secretion. A key player in SRP-mediated protein targeting is the evolutionarily conserved core consisting of the SR ...

    The signal-recognition particle (SRP) is a ubiquitous protein-RNA complex that targets proteins to cellular membranes for insertion or secretion. A key player in SRP-mediated protein targeting is the evolutionarily conserved core consisting of the SRP RNA and the multidomain protein SRP54. Communication between the SRP54 domains is critical for SRP function, where signal sequence binding at the M domain directs receptor binding at the GTPase domain (NG domain). These SRP activities are linked to domain rearrangements, for which the role of SRP RNA is not clear. In free SRP, a direct interaction of the GTPase domain with SRP RNA has been proposed but has never been structurally verified. In this study, we present the crystal structure at 2.5-A resolution of the SRP54-SRP19-SRP RNA complex of Methanococcus jannaschii SRP. The structure reveals an RNA-bound conformation of the SRP54 GTPase domain, in which the domain is spatially well separated from the signal peptide binding site. The association of both the N and G domains with SRP RNA in free SRP provides further structural evidence for the pivotal role of SRP RNA in the regulation of the SRP54 activity.


    Organizational Affiliation

    Umeå Center for Molecular Pathogenesis, Umeå University, SE-901 87 Umeå, Sweden. tobias.hainzl@ucmp.umu.se




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SIGNAL RECOGNITION PARTICLE 19 KDA PROTEIN
A, B
87Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440)Mutation(s): 0 
Gene Names: srp19
Find proteins for Q58440 (Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440))
Go to UniProtKB:  Q58440
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
SIGNAL RECOGNITION 54 KDA PROTEIN
C, D
432Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440)Mutation(s): 0 
Gene Names: srp54
Find proteins for Q57565 (Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440))
Go to UniProtKB:  Q57565
Entity ID: 3
MoleculeChainsLengthOrganism
7S RNAM,N96Methanocaldococcus jannaschii
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.244 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 70.286α = 90.00
b = 129.402β = 90.00
c = 163.417γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
MOSFLMdata reduction
REFMACrefinement
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-09-04
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance