3AB3

Crystal structure of p115RhoGEF RGS domain in complex with G alpha 13


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.205 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Identification of critical residues in G(alpha)13 for stimulation of p115RhoGEF activity and the structure of the G(alpha)13-p115RhoGEF regulator of G protein signaling homology (RH) domain complex.

Hajicek, N.Kukimoto-Niino, M.Mishima-Tsumagari, C.Chow, C.R.Shirouzu, M.Terada, T.Patel, M.Yokoyama, S.Kozasa, T.

(2011) J.Biol.Chem. 286: 20625-20636

  • DOI: 10.1074/jbc.M110.201392

  • PubMed Abstract: 
  • RH-RhoGEFs are a family of guanine nucleotide exchange factors that contain a regulator of G protein signaling homology (RH) domain. The heterotrimeric G protein Gα(13) stimulates the guanine nucleotide exchange factor (GEF) activity of RH-RhoGEFs, l ...

    RH-RhoGEFs are a family of guanine nucleotide exchange factors that contain a regulator of G protein signaling homology (RH) domain. The heterotrimeric G protein Gα(13) stimulates the guanine nucleotide exchange factor (GEF) activity of RH-RhoGEFs, leading to activation of RhoA. The mechanism by which Gα(13) stimulates the GEF activity of RH-RhoGEFs, such as p115RhoGEF, has not yet been fully elucidated. Here, specific residues in Gα(13) that mediate activation of p115RhoGEF are identified. Mutation of these residues significantly impairs binding of Gα(13) to p115RhoGEF as well as stimulation of GEF activity. These data suggest that the exchange activity of p115RhoGEF is stimulated allosterically by Gα(13) and not through its interaction with a secondary binding site. A crystal structure of Gα(13) bound to the RH domain of p115RhoGEF is also presented, which differs from a previously crystallized complex with a Gα(13)-Gα(i1) chimera. Taken together, these data provide new insight into the mechanism by which p115RhoGEF is activated by Gα(13).


    Organizational Affiliation

    Department of Pharmacology, College of Medicine, University of Illinois, Chicago, Illinois 60612, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(k) subunit alpha, Guanine nucleotide-binding protein subunit alpha-13
A, C
362Mus musculusMutation(s): 0 
Gene Names: Gna13 (Gna-13)
Find proteins for P27601 (Mus musculus)
Go to UniProtKB:  P27601
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Rho guanine nucleotide exchange factor 1
B, D
246Homo sapiensMutation(s): 0 
Gene Names: ARHGEF1
Find proteins for Q92888 (Homo sapiens)
Go to Gene View: ARHGEF1
Go to UniProtKB:  Q92888
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

Download SDF File 
Download CCD File 
A, C
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
ALF
Query on ALF

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Download CCD File 
A, C
TETRAFLUOROALUMINATE ION
Al F4
UYOMQIYKOOHAMK-UHFFFAOYSA-J
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A, C
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.205 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 50.481α = 77.77
b = 70.640β = 84.45
c = 88.078γ = 80.11
Software Package:
Software NamePurpose
CNSrefinement
MOLREPphasing
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-12-29
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2013-10-30
    Type: Database references
  • Version 1.3: 2017-08-23
    Type: Refinement description, Source and taxonomy