1XCG

Crystal Structure of Human RhoA in complex with DH/PH fragment of PDZRHOGEF


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.235 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

The crystal structure of RhoA in complex with the DH/PH fragment of PDZRhoGEF, an activator of the Ca(2+) sensitization pathway in smooth muscle

Derewenda, U.Oleksy, A.Stevenson, A.S.Korczynska, J.Dauter, Z.Somlyo, A.P.Otlewski, J.Somlyo, A.V.Derewenda, Z.S.

(2004) Structure 12: 1955-1965

  • DOI: https://doi.org/10.1016/j.str.2004.09.003
  • Primary Citation of Related Structures:  
    1XCG

  • PubMed Abstract: 

    Calcium sensitization in smooth muscle is mediated by the RhoA GTPase, activated by hitherto unspecified nucleotide exchange factors (GEFs) acting downstream of Galphaq/Galpha(12/13) trimeric G proteins. Here, we show that at least one potential GEF, the PDZRhoGEF, is present in smooth muscle, and its isolated DH/PH fragment induces calcium sensitization in the absence of agonist-mediated signaling. In vitro, the fragment shows high selectivity for the RhoA GTPase. Full-length fragment is required for the nucleotide exchange, as the isolated DH domain enhances it only marginally. We crystallized the DH/PH fragment of PDZRhoGEF in complex with nonprenylated human RhoA and determined the structure at 2.5 A resolution. The refined molecular model reveals that the mutual disposition of the DH and PH domains is significantly different from other previously described complexes involving DH/PH tandems, and that the PH domain interacts with RhoA in a unique mode. The DH domain makes several specific interactions with RhoA residues not conserved among other Rho family members, suggesting the molecular basis for the observed specificity.


  • Organizational Affiliation

    Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA 22908, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Rho guanine nucleotide exchange factor 11A,
C [auth E]
368Homo sapiensMutation(s): 0 
Gene Names: ARHGEF11KIAA0380
UniProt & NIH Common Fund Data Resources
Find proteins for O15085 (Homo sapiens)
Explore O15085 
Go to UniProtKB:  O15085
PHAROS:  O15085
GTEx:  ENSG00000132694 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO15085
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Transforming protein RhoAB,
D [auth F]
178Homo sapiensMutation(s): 1 
Gene Names: RHOAARHAARH12RHO12
UniProt & NIH Common Fund Data Resources
Find proteins for P61586 (Homo sapiens)
Explore P61586 
Go to UniProtKB:  P61586
PHAROS:  P61586
GTEx:  ENSG00000067560 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP61586
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.235 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 89.236α = 90
b = 118.782β = 114.34
c = 90.13γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
SHELXDphasing
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-12-14
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-10-20
    Changes: Database references
  • Version 1.4: 2024-02-14
    Changes: Data collection, Refinement description