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 
  • R-Value Observed: 0.233 

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
  • Primary Citation of Related Structures:  
    2XXA

  • 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 ribosomes bearing signal sequences to translocons on the target membrane ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SIGNAL RECOGNITION PARTICLE PROTEINAC433Escherichia coli K-12Mutation(s): 1 
Gene Names: ffhb2610JW5414
EC: 3.6.5.4
Find proteins for P0AGD7 (Escherichia coli (strain K12))
Explore P0AGD7 
Go to UniProtKB:  P0AGD7
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
SRP RECEPTOR FTSYBD302Escherichia coli K-12Mutation(s): 0 
Gene Names: ftsYb3464JW3429
Find proteins for P10121 (Escherichia coli (strain K12))
Explore P10121 
Go to UniProtKB:  P10121
Protein Feature View
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  • Reference Sequence
Find similar nucleic acids by: 
(by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsLengthOrganismImage
4.5S RNAF, G106Deinococcus radiodurans
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GCP
Query on GCP

Download CCD File 
A, B, C, D
PHOSPHOMETHYLPHOSPHONIC ACID GUANYLATE ESTER
C11 H18 N5 O13 P3
PHBDHXOBFUBCJD-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download CCD File 
A, B, C, D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-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 
  • R-Value Observed: 0.233 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.1α = 90
b = 131.04β = 90
c = 266.04γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

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