3GCG

crystal structure of MAP and CDC42 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 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
  • Primary Citation of Related Structures:  
    3GCG

  • 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 and selective guanine-nucleotide exchange factor (GEF) for Cdc42 ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cell division control protein 42 homolog A182Homo sapiensMutation(s): 0 
Gene Names: CDC42
EC: 3.6.5.2
Find proteins for P60953 (Homo sapiens)
Explore P60953 
Go to UniProtKB:  P60953
NIH Common Fund Data Resources
PHAROS:  P60953
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
L0028 (Mitochondria associated protein) B172Escherichia coliMutation(s): 0 
Gene Names: 
Find proteins for Q9R8E4 (Escherichia coli)
Explore Q9R8E4 
Go to UniProtKB:  Q9R8E4
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.235 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.63α = 90
b = 83.03β = 90
c = 99.52γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
sirmodel building
CNSrefinement
HKL-2000data scaling
sirphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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