8GP3

Structure of beta-arrestin1 in complex with a phosphopeptide corresponding to the human C-X-C chemokine receptor type 4, CXCR4


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural snapshots uncover a key phosphorylation motif in GPCRs driving beta-arrestin activation.

Maharana, J.Sarma, P.Yadav, M.K.Saha, S.Singh, V.Saha, S.Chami, M.Banerjee, R.Shukla, A.K.

(2023) Mol Cell 83: 2091-2107.e7

  • DOI: https://doi.org/10.1016/j.molcel.2023.04.025
  • Primary Citation of Related Structures:  
    8GO8, 8GOC, 8GOO, 8GP3, 8I0N, 8I0Q, 8I0Z, 8I10

  • PubMed Abstract: 

    Agonist-induced GPCR phosphorylation is a key determinant for the binding and activation of β-arrestins (βarrs). However, it is not entirely clear how different GPCRs harboring divergent phosphorylation patterns impart converging active conformation on βarrs leading to broadly conserved functional responses such as desensitization, endocytosis, and signaling. Here, we present multiple cryo-EM structures of activated βarrs in complex with distinct phosphorylation patterns derived from the carboxyl terminus of different GPCRs. These structures help identify a P-X-P-P type phosphorylation motif in GPCRs that interacts with a spatially organized K-K-R-R-K-K sequence in the N-domain of βarrs. Sequence analysis of the human GPCRome reveals the presence of this phosphorylation pattern in a large number of receptors, and its contribution in βarr activation is demonstrated by targeted mutagenesis experiments combined with an intrabody-based conformational sensor. Taken together, our findings provide important structural insights into the ability of distinct GPCRs to activate βarrs through a significantly conserved mechanism.


  • Organizational Affiliation

    Department of Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur 208016, India.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Beta-arrestin-1A,
C [auth B]
418Rattus norvegicusMutation(s): 0 
Gene Names: Arrb1
UniProt
Find proteins for P29066 (Rattus norvegicus)
Go to UniProtKB:  P29066
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
C-X-C chemokine receptor type 4B [auth V],
D [auth U]
17Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P61073 (Homo sapiens)
Go to UniProtKB:  P61073
PHAROS:  P61073
GTEx:  ENSG00000121966 
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Fab30 Heavy ChainE [auth H],
F [auth I]
237Mus musculusMutation(s): 0 
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Fab30 Light ChainG [auth L],
H [auth M]
215Mus musculusMutation(s): 0 
Sequence Annotations
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  • Reference Sequence
Small Molecules
Modified Residues  2 Unique
IDChains TypeFormula2D DiagramParent
SEP
Query on SEP
B [auth V],
D [auth U]
L-PEPTIDE LINKINGC3 H8 N O6 PSER
TPO
Query on TPO
B [auth V],
D [auth U]
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX
RECONSTRUCTIONcryoSPARC3.3.1

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Science and Engineering Research Board (SERB)IndiaIPA/2020/000405

Revision History  (Full details and data files)

  • Version 1.0: 2023-05-17
    Type: Initial release
  • Version 1.1: 2024-07-17
    Changes: Data collection, Database references, Refinement description