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: 3.06 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.243 
  • R-Value Observed: 0.236 

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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
  • Primary Citation of Related Structures:  
    2BCJ

  • 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 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 ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
G-protein-coupled receptor kinase 2A689Bos taurusMutation(s): 1 
Gene Names: GRK2, ADRBK1
EC: 2.7.11.15
Membrane Entity: Yes 
UniProt
Find proteins for P21146 (Bos taurus)
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UniProt GroupP21146
Protein Feature View
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1B340Bos taurusMutation(s): 1 
Gene Names: GNB1
UniProt
Find proteins for P62871 (Bos taurus)
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UniProt GroupP62871
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2C [auth G]71Bos taurusMutation(s): 1 
Gene Names: GNG2
Membrane Entity: Yes 
UniProt
Find proteins for P63212 (Bos taurus)
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UniProt GroupP63212
Protein Feature View
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(i) subunit alpha-1, Guanine nucleotide-binding protein G(q) subunit alpha chimeraD [auth Q]353Rattus norvegicus, Mus musculus
This entity is chimeric		Mutation(s): 0 
Gene Names: Gnai1, Gnai-1, Gnaq
Membrane Entity: Yes 
UniProt
Find proteins for P10824 (Rattus norvegicus)
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Find proteins for P21279 (Mus musculus)
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Entity Groups  
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UniProt GroupsP10824P21279
Protein Feature View
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Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP
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G [auth Q]GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N		 Ligand Interaction
ALF
Query on ALF
Download Ideal Coordinates CCD File 
F [auth Q]TETRAFLUOROALUMINATE ION
Al F4
UYOMQIYKOOHAMK-UHFFFAOYSA-J		 Ligand Interaction
MG
Query on MG
Download Ideal Coordinates CCD File 
E [auth Q]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.06 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.243 
  • R-Value Observed: 0.236 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.918α = 90
b = 129.954β = 95.81
c = 122.764γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

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

Revision History  (Full details and data files)

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