2BP5

MU2 ADAPTIN SUBUNIT (AP50) OF AP2 ADAPTOR (SECOND DOMAIN), COMPLEXED WITH NON-CANONICAL INTERNALIZATION PEPTIDE VEDYEQGLSG


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Non-Canonical Yxxg-Phi Endocytic Motifs: Recognition by Ap2 and Preferential Utilization in P2X4 Receptors.

Royle, S.J.Qureshi, O.S.Bobanovic, L.K.Evans, P.R.Owen, D.J.Murrell-Lagnado, R.D.

(2005) J.Cell.Sci 118: 3073

  • DOI: 10.1242/jcs.02451

  • PubMed Abstract: 
  • During clathrin-mediated endocytosis, proteins on the cell surface are selected for inclusion in clathrin-coated vesicles by clathrin adaptors, mainly the adaptor complex AP2. The P2X4 subtype of ATP-gated ion channel has in its C-terminus two putati ...

    During clathrin-mediated endocytosis, proteins on the cell surface are selected for inclusion in clathrin-coated vesicles by clathrin adaptors, mainly the adaptor complex AP2. The P2X4 subtype of ATP-gated ion channel has in its C-terminus two putative endocytic motifs: a canonical YXXPhi motif and a non-canonical YXXGPhi motif (YEQGL). We demonstrate that endocytosis of P2X4 receptors is mediated preferentially by the YXXGPhi motif because the YXXPhi motif is inaccessible to AP2 owing to the structure of the channel. The crystal structure of a complex between residues 160-435 of the mu2 subunit of AP2 and a P2X4 C-terminal peptide showed that the YEQGL motif binds to mu2 at the same site as YXXPhi motifs. Y and Phi residues are accommodated in the same hydrophobic pockets in mu2 with the extra residue between them being accommodated by changes in the peptide's backbone configuration, when compared to YXXPhi motifs. These data demonstrate that the family of potential tyrosine-based endocytic signals must be expanded to include motifs with an additional glycine at Y+3 (YXXGPhi).


    Organizational Affiliation

    Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge CB2 1PD, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CLATHRIN COAT ASSEMBLY PROTEIN AP50
M
435Rattus norvegicusMutation(s): 0 
Gene Names: Ap2m1
Find proteins for P84092 (Rattus norvegicus)
Go to UniProtKB:  P84092
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
P2X PURINOCEPTOR 4
P
10Rattus norvegicusMutation(s): 0 
Gene Names: P2rx4
Find proteins for P51577 (Rattus norvegicus)
Go to UniProtKB:  P51577
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.192 
  • Space Group: P 64
Unit Cell:
Length (Å)Angle (°)
a = 124.997α = 90.00
b = 124.997β = 90.00
c = 74.661γ = 120.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-07-06
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance