4GOU

Crystal structure of an RGS-RhoGEF from Entamoeba histolytica


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Determinants of RGS-RhoGEF Signaling Critical to Entamoeba histolytica Pathogenesis.

Bosch, D.E.Kimple, A.J.Manning, A.J.Muller, R.E.Willard, F.S.Machius, M.Rogers, S.L.Siderovski, D.P.

(2013) Structure 21: 65-75

  • DOI: 10.1016/j.str.2012.11.012

  • PubMed Abstract: 
  • G protein signaling pathways, as key components of physiologic responsiveness and timing, are frequent targets for pharmacologic intervention. Here, we identify an effector for heterotrimeric G protein α subunit (EhGα1) signaling from Entamoeba histo ...

    G protein signaling pathways, as key components of physiologic responsiveness and timing, are frequent targets for pharmacologic intervention. Here, we identify an effector for heterotrimeric G protein α subunit (EhGα1) signaling from Entamoeba histolytica, the causative agent of amoebic colitis. EhGα1 interacts with this effector and guanosine triphosphatase-accelerating protein, EhRGS-RhoGEF, in a nucleotide state-selective fashion. Coexpression of EhRGS-RhoGEF with constitutively active EhGα1 and EhRacC leads to Rac-dependent spreading in Drosophila S2 cells. EhRGS-RhoGEF overexpression in E. histolytica trophozoites leads to reduced migration toward serum and lower cysteine protease activity, as well as reduced attachment to, and killing of, host cells. A 2.3 Å crystal structure of the full-length EhRGS-RhoGEF reveals a putative inhibitory helix engaging the Dbl homology domain Rho-binding surface and the pleckstrin homology domain. Mutational analysis of the EhGα1/EhRGS-RhoGEF interface confirms a canonical "regulator of G protein signaling" domain rather than a RhoGEF-RGS ("rgRGS") domain, suggesting a convergent evolution toward heterotrimeric and small G protein cross-talk.


    Organizational Affiliation

    Department of Pharmacology, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EhRGS-RhoGEF
A
518Entamoeba histolyticaN/A
Find proteins for C4LYV4 (Entamoeba histolytica)
Go to UniProtKB:  C4LYV4
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.182 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 86.124α = 90.00
b = 46.259β = 104.20
c = 142.637γ = 90.00
Software Package:
Software NamePurpose
PHENIXmodel building
PHENIXphasing
HKL-2000data reduction
HKL-2000data scaling
HKL-2000data collection
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-01-09
    Type: Initial release
  • Version 1.1: 2013-01-30
    Type: Database references