3V5W

Human G Protein-Coupled Receptor Kinase 2 in Complex with Soluble Gbetagamma Subunits and Paroxetine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.07 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Paroxetine is a direct inhibitor of g protein-coupled receptor kinase 2 and increases myocardial contractility.

Thal, D.M.Homan, K.T.Chen, J.Wu, E.K.Hinkle, P.M.Huang, Z.M.Chuprun, J.K.Song, J.Gao, E.Cheung, J.Y.Sklar, L.A.Koch, W.J.Tesmer, J.J.

(2012) ACS Chem Biol 7: 1830-1839

  • DOI: 10.1021/cb3003013
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • G protein-coupled receptor kinase 2 (GRK2) is a well-established therapeutic target for the treatment of heart failure. Herein we identify the selective serotonin reuptake inhibitor (SSRI) paroxetine as a selective inhibitor of GRK2 activity both in ...

    G protein-coupled receptor kinase 2 (GRK2) is a well-established therapeutic target for the treatment of heart failure. Herein we identify the selective serotonin reuptake inhibitor (SSRI) paroxetine as a selective inhibitor of GRK2 activity both in vitro and in living cells. In the crystal structure of the GRK2·paroxetine-Gβγ complex, paroxetine binds in the active site of GRK2 and stabilizes the kinase domain in a novel conformation in which a unique regulatory loop forms part of the ligand binding site. Isolated cardiomyocytes show increased isoproterenol-induced shortening and contraction amplitude in the presence of paroxetine, and pretreatment of mice with paroxetine before isoproterenol significantly increases left ventricular inotropic reserve in vivo with no significant effect on heart rate. Neither is observed in the presence of the SSRI fluoxetine. Our structural and functional results validate a widely available drug as a selective chemical probe for GRK2 and represent a starting point for the rational design of more potent and specific GRK2 inhibitors.


    Organizational Affiliation

    Life Sciences Institute and the Department of Pharmacology, University of Michigan, Ann Arbor, Michigan 48109, United States.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
G-protein coupled receptor kinase 2
A
689Homo sapiensMutation(s): 0 
Gene Names: ADRBK1BARKBARK1GRK2
EC: 2.7.11.15
Find proteins for P25098 (Homo sapiens)
Go to UniProtKB:  P25098
NIH Common Fund Data Resources
PHAROS  P25098
Protein Feature View
  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
G
77Bos taurusMutation(s): 1 
Gene Names: GNG2
Find proteins for P63212 (Bos taurus)
Go to UniProtKB:  P63212
Protein Feature View
  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
B
340Bos taurusMutation(s): 0 
Gene Names: GNB1
Find proteins for P62871 (Bos taurus)
Go to UniProtKB:  P62871
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
8PR
Query on 8PR

Download CCD File 
A
Paroxetine
C19 H20 F N O3
AHOUBRCZNHFOSL-YOEHRIQHSA-N
 Ligand Interaction
MG
Query on MG

Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
8PRIC50:  3160   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.07 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.196 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 194.973α = 90
b = 71.011β = 110.41
c = 111.169γ = 90
Software Package:
Software NamePurpose
MD2data collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-09-26
    Type: Initial release
  • Version 1.1: 2012-12-12
    Changes: Database references