4C7O

The structural basis of FtsY recruitment and GTPase activation by SRP RNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.163 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The Structural Basis of Ftsy Recruitment and Gtpase Activation by Srp RNA

Voigts-Hoffmann, F.Schmitz, N.Shen, K.Shan, S.O.Ataide, S.F.Ban, N.

(2013) Mol.Cell 52: 643

  • DOI: 10.1016/j.molcel.2013.10.005

  • PubMed Abstract: 
  • The universally conserved signal recognition particle (SRP) system mediates the targeting of membrane proteins to the translocon in a multistep process controlled by GTP hydrolysis. Here we present the 2.6 Å crystal structure of the GTPase domains of ...

    The universally conserved signal recognition particle (SRP) system mediates the targeting of membrane proteins to the translocon in a multistep process controlled by GTP hydrolysis. Here we present the 2.6 Å crystal structure of the GTPase domains of the E. coli SRP protein (Ffh) and its receptor (FtsY) in complex with the tetraloop and the distal region of SRP-RNA, trapped in the activated state in presence of GDP:AlF4. The structure reveals the atomic details of FtsY recruitment and, together with biochemical experiments, pinpoints G83 as the key RNA residue that stimulates GTP hydrolysis. Insertion of G83 into the FtsY active site orients a single glutamate residue provided by Ffh (E277), triggering GTP hydrolysis and complex disassembly at the end of the targeting cycle. The complete conservation of the key residues of the SRP-RNA and the SRP protein implies that the suggested chemical mechanism of GTPase activation is applicable across all kingdoms.


    Organizational Affiliation

    ETH Zurich (Swiss Federal Institute of Technology), Institute of Molecular Biology and Biophysics, Zürich 8093, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SIGNAL RECOGNITION PARTICLE PROTEIN
A, C
298Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: ffh
Find proteins for P0AGD7 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AGD7
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
SIGNAL RECOGNITION PARTICLE RECEPTOR FTSY
B, D
278Escherichia 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
SRP RNAE48Escherichia coli K-12
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

Download SDF File 
Download CCD File 
A, B, C, D
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
ALF
Query on ALF

Download SDF File 
Download CCD File 
A, B, C, D
TETRAFLUOROALUMINATE ION
Al F4
UYOMQIYKOOHAMK-UHFFFAOYSA-J
 Ligand Interaction
MG
Query on MG

Download SDF File 
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: 2.6 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.163 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 56.720α = 90.00
b = 166.330β = 90.00
c = 154.590γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
PHENIXrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-11-20
    Type: Initial release
  • Version 1.1: 2014-01-08
    Type: Database references