2XXA

The Crystal Structure of the Signal Recognition Particle (SRP) in Complex with its Receptor(SR)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.94 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.232 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Crystal Structure of the Signal Recognition Particle in Complex with its Receptor.

Ataide, S.F.Schmitz, N.Shen, K.Ke, A.Shan, S.Doudna, J.A.Ban, N.

(2011) Science 331: 881

  • DOI: 10.1126/science.1196473

  • PubMed Abstract: 
  • Cotranslational targeting of membrane and secretory proteins is mediated by the universally conserved signal recognition particle (SRP). Together with its receptor (SR), SRP mediates the guanine triphosphate (GTP)-dependent delivery of translating ri ...

    Cotranslational targeting of membrane and secretory proteins is mediated by the universally conserved signal recognition particle (SRP). Together with its receptor (SR), SRP mediates the guanine triphosphate (GTP)-dependent delivery of translating ribosomes bearing signal sequences to translocons on the target membrane. Here, we present the crystal structure of the SRP:SR complex at 3.9 angstrom resolution and biochemical data revealing that the activated SRP:SR guanine triphosphatase (GTPase) complex binds the distal end of the SRP hairpin RNA where GTP hydrolysis is stimulated. Combined with previous findings, these results suggest that the SRP:SR GTPase complex initially assembles at the tetraloop end of the SRP RNA and then relocalizes to the opposite end of the RNA. This rearrangement provides a mechanism for coupling GTP hydrolysis to the handover of cargo to the translocon.


    Organizational Affiliation

    Institute of Molecular Biology and Biophysics, Eidgenössische Technische Hochschule Zurich (ETH Zurich), Zurich, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SIGNAL RECOGNITION PARTICLE PROTEIN
A, C
433Escherichia coli (strain K12)Mutation(s): 1 
Gene Names: ffh
Find proteins for P0AGD7 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AGD7
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
SRP RECEPTOR FTSY
B, D
302Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: ftsY
Find proteins for P10121 (Escherichia coli (strain K12))
Go to UniProtKB:  P10121
Entity ID: 3
MoleculeChainsLengthOrganism
4.5S RNAF,G106Deinococcus radiodurans
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
A, B, C, D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
GCP
Query on GCP

Download SDF File 
Download CCD File 
A, B, C, D
PHOSPHOMETHYLPHOSPHONIC ACID GUANYLATE ESTER
C11 H18 N5 O13 P3
PHBDHXOBFUBCJD-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.94 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.232 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 84.100α = 90.00
b = 131.040β = 90.00
c = 266.040γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling
BUSTERrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-03-02
    Type: Initial release
  • Version 1.1: 2015-05-20
    Type: Other, Refinement description, Source and taxonomy, Version format compliance
  • Version 1.2: 2015-06-03
    Type: Derived calculations