2BOV

Molecular recognition of an ADP-ribosylating Clostridium botulinum C3 exoenzyme by RalA GTPase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.66 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Molecular Recognition of an Adp-Ribosylating Clostridium Botulinum C3 Exoenzyme by Rala Gtpase

Holbourn, K.P.Sutton, J.M.Evans, H.R.Shone, C.C.Acharya, K.R.

(2005) Proc.Natl.Acad.Sci.USA 102: 5357

  • DOI: 10.1073/pnas.0501525102
  • Also Cited By: 2A9K, 2A78

  • PubMed Abstract: 
  • C3 exoenzymes (members of the ADP-ribosyltranferase family) are produced by Clostridium botulinum (C3bot1 and -2), Clostridium limosum (C3lim), Bacillus cereus (C3cer), and Staphylococcus aureus (C3stau1-3). These exoenzymes lack a translocation doma ...

    C3 exoenzymes (members of the ADP-ribosyltranferase family) are produced by Clostridium botulinum (C3bot1 and -2), Clostridium limosum (C3lim), Bacillus cereus (C3cer), and Staphylococcus aureus (C3stau1-3). These exoenzymes lack a translocation domain but are known to specifically inactivate Rho GTPases in host target cells. Here, we report the crystal structure of C3bot1 in complex with RalA (a GTPase of the Ras subfamily) and GDP at a resolution of 2.66 A. RalA is not ADP-ribosylated by C3 exoenzymes but inhibits ADP-ribosylation of RhoA by C3bot1, C3lim, and C3cer to different extents. The structure provides an insight into the molecular interactions between C3bot1 and RalA involving the catalytic ADP-ribosylating turn-turn (ARTT) loop from C3bot1 and helix alpha4 and strand beta6 (which are not part of the GDP-binding pocket) from RalA. The structure also suggests a molecular explanation for the different levels of C3-exoenzyme inhibition by RalA and why RhoA does not bind C3bot1 in this manner.


    Organizational Affiliation

    Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RAS-RELATED PROTEIN RAL-A
A
206Homo sapiensMutation(s): 0 
Gene Names: RALA (RAL)
Find proteins for P11233 (Homo sapiens)
Go to Gene View: RALA
Go to UniProtKB:  P11233
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
MONO-ADP-RIBOSYLTRANSFERASE C3
B
251Clostridium botulinum D phageMutation(s): 0 
Gene Names: C3
EC: 2.4.2.-
Find proteins for P15879 (Clostridium botulinum D phage)
Go to Gene View: C3
Go to UniProtKB:  P15879
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

Download SDF File 
Download CCD File 
A
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.66 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.206 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 56.629α = 90.00
b = 90.836β = 90.00
c = 100.400γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
MOLREPphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-04-15
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance