5FPI

Mu2 adaptin subunit of the AP2 adaptor (C-terminal domain) complexed with Integrin alpha4 internalisation peptide QYKSILQE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.77 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Selective Integrin Endocytosis is Driven by Alpha Chain:Ap2 Interactions

De Franceschi, N.Arjonen, A.Elkhatib, N.Denessiouk, K.Wrobel, A.G.Wilson, T.A.Pouwels, J.Montagnac, G.Owen, D.J.Ivaska, J.

(2016) Nat.Struct.Mol.Biol. 23: 172

  • DOI: 10.1038/nsmb.3161

  • PubMed Abstract: 
  • Integrins are heterodimeric cell-surface adhesion molecules comprising one of 18 possible α-chains and one of eight possible β-chains. They control a range of cell functions in a matrix- and ligand-specific manner. Integrins can be internalized by cl ...

    Integrins are heterodimeric cell-surface adhesion molecules comprising one of 18 possible α-chains and one of eight possible β-chains. They control a range of cell functions in a matrix- and ligand-specific manner. Integrins can be internalized by clathrin-mediated endocytosis (CME) through β subunit-based motifs found in all integrin heterodimers. However, whether specific integrin heterodimers can be selectively endocytosed was unknown. Here, we found that a subset of α subunits contain an evolutionarily conserved and functional YxxΦ motif directing integrins to selective internalization by the most abundant endocytic clathrin adaptor, AP2. We determined the structure of the human integrin α4-tail motif in complex with the AP2 C-μ2 subunit and confirmed the interaction by isothermal titration calorimetry. Mutagenesis of the motif impaired selective heterodimer endocytosis and attenuated integrin-mediated cell migration. We propose that integrins evolved to enable selective integrin-receptor turnover in response to changing matrix conditions.


    Organizational Affiliation

    Turku Centre for Biotechnology, University of Turku, Turku, Finland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AP-2 COMPLEX SUBUNIT MU
A
446Rattus norvegicusMutation(s): 0 
Gene Names: Ap2m1
Find proteins for P84092 (Rattus norvegicus)
Go to UniProtKB:  P84092
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
INTEGRIN ALPHA-4 SUBUNIT
B
8Homo sapiensMutation(s): 0 
Gene Names: ITGA4 (CD49D)
Find proteins for P13612 (Homo sapiens)
Go to Gene View: ITGA4
Go to UniProtKB:  P13612
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.77 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.174 
  • Space Group: P 64
Unit Cell:
Length (Å)Angle (°)
a = 125.650α = 90.00
b = 125.650β = 90.00
c = 74.410γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
Aimlessdata scaling
MOSFLMdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-01-20
    Type: Initial release
  • Version 1.1: 2016-01-27
    Type: Database references
  • Version 1.2: 2016-03-02
    Type: Database references