2BCJ

Crystal Structure of G Protein-Coupled Receptor Kinase 2 in Complex with Galpha-q and Gbetagamma Subunits


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.061 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.243 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Snapshot of Activated G Proteins at the Membrane: The Gq-GRK2-G Complex

Tesmer, V.M.Kawano, T.Shankaranarayanan, A.Kozasa, T.Tesmer, J.J.G.

(2005) Science 310: 1686-1690

  • DOI: 10.1126/science.1118890

  • PubMed Abstract: 
  • G protein-coupled receptor kinase 2 (GRK2) plays a key role in the desensitization of G protein-coupled receptor signaling by phosphorylating activated heptahelical receptors and by sequestering heterotrimeric G proteins. We report the atomic structu ...

    G protein-coupled receptor kinase 2 (GRK2) plays a key role in the desensitization of G protein-coupled receptor signaling by phosphorylating activated heptahelical receptors and by sequestering heterotrimeric G proteins. We report the atomic structure of GRK2 in complex with Galphaq and Gbetagamma, in which the activated Galpha subunit of Gq is fully dissociated from Gbetagamma and dramatically reoriented from its position in the inactive Galphabetagamma heterotrimer. Galphaq forms an effector-like interaction with the GRK2 regulator of G protein signaling (RGS) homology domain that is distinct from and does not overlap with that used to bind RGS proteins such as RGS4.


    Organizational Affiliation

    Institute for Cellular and Molecular Biology, Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, TX 78712, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
G-protein-coupled receptor kinase 2
A
689Bos taurusGene Names: ADRBK1 (GRK2)
EC: 2.7.11.15
Find proteins for P21146 (Bos taurus)
Go to UniProtKB:  P21146
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
B
340Bos taurusGene Names: GNB1
Find proteins for P62871 (Bos taurus)
Go to Gene View: GNB1
Go to UniProtKB:  P62871
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
G
71Bos taurusGene Names: GNG2
Find proteins for P63212 (Bos taurus)
Go to Gene View: GNG2
Go to UniProtKB:  P63212
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(i) subunit alpha-1, Guanine nucleotide-binding protein G(q) subunit alpha chimera
Q
353Mus musculusRattus norvegicus
This entity is chimeric
Gene Names: Gnaq, Gnai1 (Gnai-1)
Find proteins for P21279 (Mus musculus)
Go to UniProtKB:  P21279
Find proteins for P10824 (Rattus norvegicus)
Go to UniProtKB:  P10824
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

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

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

Download SDF File 
Download CCD File 
Q
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
ACE
Query on ACE
B
NON-POLYMERC2 H4 O

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.061 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.243 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 64.918α = 90.00
b = 129.954β = 95.81
c = 122.764γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data reduction
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2005-10-19 
  • Released Date: 2005-12-20 
  • Deposition Author(s): Tesmer, J.J.G.

Revision History 

  • Version 1.0: 2005-12-20
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.3: 2017-06-28
    Type: Database references, Source and taxonomy, Structure summary