4JQI

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

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

  • 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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Beta-arrestin-1
A
401Rattus norvegicusGene Names: Arrb1
Find proteins for P29066 (Rattus norvegicus)
Go to UniProtKB:  P29066
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Fab30 heavy chain
H
237N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Fab30 light chain
L
215N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Vasopressin V2 receptor phosphopeptide
V
29N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A, H
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
EDO
Query on EDO

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Download CCD File 
A, H, L
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
PRO
Query on PRO

Download SDF File 
Download CCD File 
L
PROLINE
C5 H9 N O2
ONIBWKKTOPOVIA-BYPYZUCNSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
V
L-PEPTIDE LINKINGC3 H8 N O6 PSER
TPO
Query on TPO
V
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.201 
  • Space Group: I 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 116.840α = 90.00
b = 125.128β = 90.00
c = 144.203γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
PHASERphasing
Blu-Icedata collection
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

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