4JQI

Structure of active beta-arrestin1 bound to a G protein-coupled receptor phosphopeptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.203 

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Literature

Structure of active beta-arrestin-1 bound to a G-protein-coupled receptor phosphopeptide.

Shukla, A.K.Manglik, A.Kruse, A.C.Xiao, K.Reis, R.I.Tseng, W.C.Staus, D.P.Hilger, D.Uysal, S.Huang, L.Y.Paduch, M.Tripathi-Shukla, P.Koide, A.Koide, S.Weis, W.I.Kossiakoff, A.A.Kobilka, B.K.Lefkowitz, R.J.

(2013) Nature 497: 137-141

  • DOI: 10.1038/nature12120
  • Primary Citation of Related Structures:  
    4JQI

  • PubMed Abstract: 
  • The functions of G-protein-coupled receptors (GPCRs) are primarily mediated and modulated by three families of proteins: the heterotrimeric G proteins, the G-protein-coupled receptor kinases (GRKs) and the arrestins. G proteins mediate activation of ...

    The functions of G-protein-coupled receptors (GPCRs) are primarily mediated and modulated by three families of proteins: the heterotrimeric G proteins, the G-protein-coupled receptor kinases (GRKs) and the arrestins. G proteins mediate activation of second-messenger-generating enzymes and other effectors, GRKs phosphorylate activated receptors, and arrestins subsequently bind phosphorylated receptors and cause receptor desensitization. Arrestins activated by interaction with phosphorylated receptors can also mediate G-protein-independent signalling by serving as adaptors to link receptors to numerous signalling pathways. Despite their central role in regulation and signalling of GPCRs, a structural understanding of β-arrestin activation and interaction with GPCRs is still lacking. Here we report the crystal structure of β-arrestin-1 (also called arrestin-2) in complex with a fully phosphorylated 29-amino-acid carboxy-terminal peptide derived from the human V2 vasopressin receptor (V2Rpp). This peptide has previously been shown to functionally and conformationally activate β-arrestin-1 (ref. 5). To capture this active conformation, we used a conformationally selective synthetic antibody fragment (Fab30) that recognizes the phosphopeptide-activated state of β-arrestin-1. The structure of the β-arrestin-1-V2Rpp-Fab30 complex shows marked conformational differences in β-arrestin-1 compared to its inactive conformation. These include rotation of the amino- and carboxy-terminal domains relative to each other, and a major reorientation of the 'lariat loop' implicated in maintaining the inactive state of β-arrestin-1. These results reveal, at high resolution, a receptor-interacting interface on β-arrestin, and they indicate a potentially general molecular mechanism for activation of these multifunctional signalling and regulatory proteins.


    Organizational Affiliation

    Department of Medicine, Duke University Medical Center, Durham, North Carolina 27710, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-arrestin-1A401Rattus norvegicusMutation(s): 0 
Gene Names: Arrb1
Find proteins for P29066 (Rattus norvegicus)
Explore P29066 
Go to UniProtKB:  P29066
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Fab30 heavy chainH237Mus musculusMutation(s): 0 
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Fab30 light chainL215Mus musculusMutation(s): 0 
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Vasopressin V2 receptor phosphopeptideV29N/AMutation(s): 0 
Find proteins for P30518 (Homo sapiens)
Explore P30518 
Go to UniProtKB:  P30518
NIH Common Fund Data Resources
PHAROS  P30518
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.203 
  • Space Group: I 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.84α = 90
b = 125.128β = 90
c = 144.203γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Revision History 

  • Version 1.0: 2013-04-17
    Type: Initial release
  • Version 1.1: 2013-10-23
    Changes: Database references