3KZ1

Crystal Structure of the Complex of PDZ-RhoGEF DH/PH domains with GTP-gamma-S Activated RhoA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.234 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Activated RhoA binds to the pleckstrin homology (PH) domain of PDZ-RhoGEF, a potential site for autoregulation.

Chen, Z.Medina, F.Liu, M.Y.Thomas, C.Sprang, S.R.Sternweis, P.C.

(2010) J.Biol.Chem. 285: 21070-21081

  • DOI: 10.1074/jbc.M110.122549

  • PubMed Abstract: 
  • Guanine nucleotide exchange factors (GEFs) catalyze exchange of GDP for GTP by stabilizing the nucleotide-free state of the small GTPases through their Dbl homology/pleckstrin homology (DH.PH) domains. Unconventionally, PDZ-RhoGEF (PRG), a member of ...

    Guanine nucleotide exchange factors (GEFs) catalyze exchange of GDP for GTP by stabilizing the nucleotide-free state of the small GTPases through their Dbl homology/pleckstrin homology (DH.PH) domains. Unconventionally, PDZ-RhoGEF (PRG), a member of the RGS-RhoGEFs, binds tightly to both nucleotide-free and activated RhoA (RhoA.GTP). We have characterized the interaction between PRG and activated RhoA and determined the structure of the PRG-DH.PH-RhoA.GTPgammaS (guanosine 5'-O-[gamma-thio]triphosphate) complex. The interface bears striking similarity to a GTPase-effector interface and involves the switch regions in RhoA and a hydrophobic patch in PRG-PH that is conserved among all Lbc RhoGEFs. The two surfaces that bind activated and nucleotide-free RhoA on PRG-DH.PH do not overlap, and a ternary complex of PRG-DH.PH bound to both forms of RhoA can be isolated by size-exclusion chromatography. This novel interaction between activated RhoA and PH could play a key role in regulation of RhoGEF activity in vivo.


    Organizational Affiliation

    Department of Pharmacology, The University of Texas Southwestern Medical Center, Dallas, TX 75390, USA. Zhe.Chen@utsouthwestern.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Rho guanine nucleotide exchange factor 11
A, B
383Homo sapiensMutation(s): 0 
Gene Names: ARHGEF11 (KIAA0380)
Find proteins for O15085 (Homo sapiens)
Go to Gene View: ARHGEF11
Go to UniProtKB:  O15085
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Transforming protein RhoA
E, F
182Homo sapiensMutation(s): 0 
Gene Names: RHOA (ARH12, ARHA, RHO12)
Find proteins for P61586 (Homo sapiens)
Go to Gene View: RHOA
Go to UniProtKB:  P61586
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
E, F
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
GSP
Query on GSP

Download SDF File 
Download CCD File 
E, F
5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE
C10 H16 N5 O13 P3 S
XOFLBQFBSOEHOG-UUOKFMHZSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.234 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 98.166α = 90.00
b = 111.836β = 90.00
c = 138.390γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
PHASERphasing
HKL-2000data reduction
HKL-3000data collection
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-04-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Refinement description, Version format compliance