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 

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Ligand Structure Quality Assessment 


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
  • Primary Citation of Related Structures:  
    3V5W

  • 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 vitro and in living cells ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
G-protein coupled receptor kinase 2A689Homo sapiensMutation(s): 0 
Gene Names: ADRBK1BARKBARK1GRK2
EC: 2.7.11.15
UniProt & NIH Common Fund Data Resources
Find proteins for P25098 (Homo sapiens)
Explore P25098 
Go to UniProtKB:  P25098
PHAROS:  P25098
Entity Groups  
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UniProt GroupP25098
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1B340Bos taurusMutation(s): 0 
Gene Names: GNB1
UniProt
Find proteins for P62871 (Bos taurus)
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UniProt GroupP62871
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2C [auth G]77Bos taurusMutation(s): 1 
Gene Names: GNG2
UniProt
Find proteins for P63212 (Bos taurus)
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Go to UniProtKB:  P63212
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UniProt GroupP63212
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
8PR
Query on 8PR

Download Ideal Coordinates CCD File 
D [auth A]Paroxetine
C19 H20 F N O3
AHOUBRCZNHFOSL-YOEHRIQHSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
E [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
8PR BindingDB:  3V5W Kd: 2980 (nM) from 1 assay(s)
IC50: min: 780, max: 1380 (nM) from 3 assay(s)
Binding MOAD:  3V5W IC50: 3160 (nM) from 1 assay(s)
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

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

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