3GCG

crystal structure of MAP and CDC42 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.235 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural insights into host GTPase isoform selection by a family of bacterial GEF mimics

Huang, Z.Sutton, S.E.Wallenfang, A.J.Orchard, R.C.Wu, X.Feng, Y.Chai, J.Alto, N.M.

(2009) Nat.Struct.Mol.Biol. 16: 853-860

  • DOI: 10.1038/nsmb.1647

  • PubMed Abstract: 
  • The Escherichia coli type III effector Map belongs to a large family of bacterial virulence factors that activate host Rho GTPase signaling pathways through an unknown molecular mechanism. Here we report direct evidence that Map functions as a potent ...

    The Escherichia coli type III effector Map belongs to a large family of bacterial virulence factors that activate host Rho GTPase signaling pathways through an unknown molecular mechanism. Here we report direct evidence that Map functions as a potent and selective guanine-nucleotide exchange factor (GEF) for Cdc42. The 2.3-A structure of the Map-Cdc42 complex revealed that Map mimics the GEF strategy of the mammalian Dbl family but has a three-dimensional architecture that is nearly identical to the bacterial GEF Salmonella spp. SopE. A comparative analysis between human and bacterial GEFs revealed a previously uncharacterized pairing mechanism between Map and the variable beta2-3 interswitch region of Cdc42. We propose a GTPase selection model that is experimentally validated by the preferential activation Rac1 and RhoA by the Shigella spp. effectors IpgB1 and IpgB2, respectively. These results significantly expand the repertoire of bacterial GEF mimics and unify a GEF selection mechanism for host GTPase substrates.


    Organizational Affiliation

    National Institute of Biological Sciences, Zhong Guan Cun Life Science Park, Beijing, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cell division control protein 42 homolog
A
182Homo sapiensMutation(s): 0 
Gene Names: CDC42
EC: 3.6.5.2
Find proteins for P60953 (Homo sapiens)
Go to Gene View: CDC42
Go to UniProtKB:  P60953
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
L0028 (Mitochondria associated protein)
B
172Escherichia coliMutation(s): 0 
Gene Names: map
Find proteins for Q9R8E4 (Escherichia coli)
Go to UniProtKB:  Q9R8E4
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.235 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 41.630α = 90.00
b = 83.030β = 90.00
c = 99.520γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
sirphasing
sirmodel building
CNSrefinement
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-07-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance