2IHB

Crystal structure of the heterodimeric complex of human RGS10 and activated Gi alpha 3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.71 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural diversity in the RGS domain and its interaction with heterotrimeric G protein alpha-subunits.

Soundararajan, M.Willard, F.S.Kimple, A.J.Turnbull, A.P.Ball, L.J.Schoch, G.A.Gileadi, C.Fedorov, O.Y.Dowler, E.F.Higman, V.A.Hutsell, S.Q.Sundstrom, M.Doyle, D.A.Siderovski, D.P.

(2008) Proc.Natl.Acad.Sci.Usa 105: 6457-6462

  • DOI: 10.1073/pnas.0801508105
  • Primary Citation of Related Structures:  1ZV4, 2A72, 2AF0, 2BT2, 2BV1, 2GTP, 2I59, 2IHD, 2IK8, 2JM5, 2JNU, 2ODE, 2OWI, 2ES0

  • PubMed Abstract: 
  • Regulator of G protein signaling (RGS) proteins accelerate GTP hydrolysis by Galpha subunits and thus facilitate termination of signaling initiated by G protein-coupled receptors (GPCRs). RGS proteins hold great promise as disease intervention points ...

    Regulator of G protein signaling (RGS) proteins accelerate GTP hydrolysis by Galpha subunits and thus facilitate termination of signaling initiated by G protein-coupled receptors (GPCRs). RGS proteins hold great promise as disease intervention points, given their signature role as negative regulators of GPCRs-receptors to which the largest fraction of approved medications are currently directed. RGS proteins share a hallmark RGS domain that interacts most avidly with Galpha when in its transition state for GTP hydrolysis; by binding and stabilizing switch regions I and II of Galpha, RGS domain binding consequently accelerates Galpha-mediated GTP hydrolysis. The human genome encodes more than three dozen RGS domain-containing proteins with varied Galpha substrate specificities. To facilitate their exploitation as drug-discovery targets, we have taken a systematic structural biology approach toward cataloging the structural diversity present among RGS domains and identifying molecular determinants of their differential Galpha selectivities. Here, we determined 14 structures derived from NMR and x-ray crystallography of members of the R4, R7, R12, and RZ subfamilies of RGS proteins, including 10 uncomplexed RGS domains and 4 RGS domain/Galpha complexes. Heterogeneity observed in the structural architecture of the RGS domain, as well as in engagement of switch III and the all-helical domain of the Galpha substrate, suggests that unique structural determinants specific to particular RGS protein/Galpha pairings exist and could be used to achieve selective inhibition by small molecules.


    Organizational Affiliation

    Structural Genomics Consortium, Oxford University, Oxford OX3 7DQ, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(k) subunit alpha
A
323Homo sapiensGene Names: GNAI3
Find proteins for P08754 (Homo sapiens)
Go to Gene View: GNAI3
Go to UniProtKB:  P08754
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Regulator of G-protein signalling 10
B
153Homo sapiensGene Names: RGS10
Find proteins for O43665 (Homo sapiens)
Go to Gene View: RGS10
Go to UniProtKB:  O43665
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

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

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

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.71 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.208 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 100.628α = 90.00
b = 100.628β = 90.00
c = 145.359γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data reduction
PHASERphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2006-11-21
    Type: Initial release
  • Version 1.1: 2007-10-10
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance