3A8N

Crystal structure of the Tiam1 PHCCEx domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.50 Å
  • R-Value Free: 0.396 
  • R-Value Work: 0.306 
  • R-Value Observed: 0.306 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The PHCCEx domain of Tiam1/2 is a novel protein- and membrane-binding module

Terawaki, S.Kitano, K.Mori, T.Zhai, Y.Higuchi, Y.Itoh, N.Watanabe, T.Kaibuchi, K.Hakoshima, T.

(2010) EMBO J 29: 236-250

  • DOI: 10.1038/emboj.2009.323
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Tiam1 and Tiam2 (Tiam1/2) are guanine nucleotide-exchange factors that possess the PH-CC-Ex (pleckstrin homology, coiled coil and extra) region that mediates binding to plasma membranes and signalling proteins in the activation of Rac GTPases. Crysta ...

    Tiam1 and Tiam2 (Tiam1/2) are guanine nucleotide-exchange factors that possess the PH-CC-Ex (pleckstrin homology, coiled coil and extra) region that mediates binding to plasma membranes and signalling proteins in the activation of Rac GTPases. Crystal structures of the PH-CC-Ex regions revealed a single globular domain, PHCCEx domain, comprising a conventional PH subdomain associated with an antiparallel coiled coil of CC subdomain and a novel three-helical globular Ex subdomain. The PH subdomain resembles the beta-spectrin PH domain, suggesting non-canonical phosphatidylinositol binding. Mutational and binding studies indicated that CC and Ex subdomains form a positively charged surface for protein binding. We identified two unique acidic sequence motifs in Tiam1/2-interacting proteins for binding to PHCCEx domain, Motif-I in CD44 and ephrinB's and the NMDA receptor, and Motif-II in Par3 and JIP2. Our results suggest the molecular basis by which the Tiam1/2 PHCCEx domain facilitates dual binding to membranes and signalling proteins.


    Organizational Affiliation

    Structural Biology Laboratory, Nara Institute of Science and Technology, Takayama, Ikoma, Nara, Japan.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
T-lymphoma invasion and metastasis-inducing protein 1
A
279Mus musculusMutation(s): 0 
Gene Names: Tiam1Tiam-1
Find proteins for Q60610 (Mus musculus)
Go to UniProtKB:  Q60610
NIH Common Fund Data Resources
IMPC  MGI:103306
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.50 Å
  • R-Value Free: 0.396 
  • R-Value Work: 0.306 
  • R-Value Observed: 0.306 
  • Space Group: P 64 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 113.47α = 90
b = 113.47β = 90
c = 113.837γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
MOLREPphasing
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-11-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance