Crystal Structure of G Protein-Coupled Receptor Kinase 5 in Complex with AMP-PNP

Experimental Data Snapshot

  • Resolution: 1.80 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.174 

Starting Model: experimental
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This is version 1.4 of the entry. See complete history


Atomic Structure of G Protein-Coupled Receptor Kinase 5 (GRK5) Reveals Distinct Structural Features Novel for GRKs.

Komolov, K.E.Bhardwaj, A.Benovic, J.L.

(2015) J Biol Chem 

  • DOI: https://doi.org/10.1074/jbc.M115.647297
  • Primary Citation of Related Structures:  
    4TNB, 4TND

  • PubMed Abstract: 

    G protein-coupled receptor kinases (GRKs) are members of the protein kinase A, G, and C families (AGC) and play a central role in mediating G protein-coupled receptor phosphorylation and desensitization. One member of the family, GRK5, has been implicated in several human pathologies, including heart failure, hypertension, cancer, diabetes, and Alzheimer disease. To gain mechanistic insight into GRK5 function, we determined a crystal structure of full-length human GRK5 at 1.8 Å resolution. GRK5 in complex with the ATP analog 5'-adenylyl β,γ-imidodiphosphate or the nucleoside sangivamycin crystallized as a monomer. The C-terminal tail (C-tail) of AGC kinase domains is a highly conserved feature that is divided into three segments as follows: the C-lobe tether, the active-site tether (AST), and the N-lobe tether (NLT). This domain is fully resolved in GRK5 and reveals novel interactions with the nucleotide and N-lobe. Similar to other AGC kinases, the GRK5 AST is an integral part of the nucleotide-binding pocket, a feature not observed in other GRKs. The AST also mediates contact between the kinase N- and C-lobes facilitating closure of the kinase domain. The GRK5 NLT is largely displaced from its previously observed position in other GRKs. Moreover, although the autophosphorylation sites in the NLT are >20 Å away from the catalytic cleft, they are capable of rapid cis-autophosphorylation suggesting high mobility of this region. In summary, we provide a snapshot of GRK5 in a partially closed state, where structural elements of the kinase domain C-tail are aligned to form novel interactions to the nucleotide and N-lobe not previously observed in other GRKs.

  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
G protein-coupled receptor kinase 5590Homo sapiensMutation(s): 0 
Gene Names: GRK5GPRK5
UniProt & NIH Common Fund Data Resources
Find proteins for P34947 (Homo sapiens)
Explore P34947 
Go to UniProtKB:  P34947
GTEx:  ENSG00000198873 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP34947
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on ANP

Download Ideal Coordinates CCD File 
C10 H17 N6 O12 P3
Query on MG

Download Ideal Coordinates CCD File 
Experimental Data & Validation

Experimental Data

  • Resolution: 1.80 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.174 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.975α = 90
b = 62.975β = 90
c = 292.644γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
AUTOMARdata reduction

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-06-10
    Type: Initial release
  • Version 1.1: 2015-06-17
    Changes: Database references
  • Version 1.2: 2016-07-20
    Changes: Data collection
  • Version 1.3: 2017-11-22
    Changes: Derived calculations, Refinement description
  • Version 1.4: 2023-09-27
    Changes: Data collection, Database references, Refinement description