4C7O

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.166 

wwPDB Validation   3D Report Full Report


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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
  • Primary Citation of Related Structures:  
    4C7O

  • 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 E ...

    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. Electronic address: ban@mol.biol.ethz.ch.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SIGNAL RECOGNITION PARTICLE PROTEINA, C298Escherichia coli K-12Mutation(s): 0 
Gene Names: ffhb2610JW5414
Find proteins for P0AGD7 (Escherichia coli (strain K12))
Explore P0AGD7 
Go to UniProtKB:  P0AGD7
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
SIGNAL RECOGNITION PARTICLE RECEPTOR FTSYB, D278Escherichia 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
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Entity ID: 3
MoleculeChainsLengthOrganismImage
SRP RNAE48Escherichia coli K-12
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.166 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.72α = 90
b = 166.33β = 90
c = 154.59γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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