5EFX

Crystal structure of Rho GTPase regulator


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.451 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.217 

wwPDB Validation 3D Report Full Report


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Literature

Crystal structure of hGEF-H1 PH domain provides insight into incapability in phosphoinositide binding

Jiang, Y.Jiang, H.Zhou, S.Meng, B.Liu, Z.J.Ouyang, S.

(2016) Biochem.Biophys.Res.Commun. 471: 621-627

  • DOI: 10.1016/j.bbrc.2016.01.150

  • PubMed Abstract: 
  • The guanine nucleotide exchange factor GEF-H1 (also known as ARHGEF2) is identified as a member of the Dbl family of GEFs. It regulates RhoA-dependent cell signaling pathways and plays important roles in biological processes. GEF-H1 contains an N-ter ...

    The guanine nucleotide exchange factor GEF-H1 (also known as ARHGEF2) is identified as a member of the Dbl family of GEFs. It regulates RhoA-dependent cell signaling pathways and plays important roles in biological processes. GEF-H1 contains an N-terminal zinc finger domain, a Dbl-homologous (DH) domain followed by a Pleckstrin homology (PH) domain, and a C-terminal domain. The specific roles of its PH domain are poorly understood. Here we report the crystal structure of human GEF-H1 PH domain to 2.45 Å resolution. A conserved surface is formed by β8, β9, β10, and it may mediate protein-protein interactions. Although the folding resembles other PH domains that have defined structures, superposition of different PH domains clearly shows that the loop between β6/β7 and the loop between β3/β4 are so close that they will prevent its binding with phosphoinositide due to steric hindrance, and this has been proved by isothermal titration calorimetry (ITC) and thermal shift assay (TSA). Our studies provide a structural framework for further work on the function of GEF-H1.


    Organizational Affiliation

    National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Rho guanine nucleotide exchange factor 2
A
144Homo sapiensMutation(s): 0 
Gene Names: ARHGEF2 (KIAA0651, LFP40)
Find proteins for Q92974 (Homo sapiens)
Go to Gene View: ARHGEF2
Go to UniProtKB:  Q92974
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.451 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.217 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 37.948α = 90.00
b = 81.825β = 90.00
c = 119.830γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
Cootmodel building
HKL-2000data reduction
PHENIXrefinement
Cootrefinement
HKL-2000data processing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
China--

Revision History 

  • Version 1.0: 2016-06-29
    Type: Initial release