2XA7

AP2 clathrin adaptor core in active complex with cargo peptides


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.236 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A Large Scale Conformational Change Couples Membrane Recruitment to Cargo Binding in the Ap2 Clathrin Adaptor Complex

Jackson, L.P.Kelly, B.T.Mccoy, A.J.Gaffry, T.James, L.C.Collins, B.M.Honing, S.Evans, P.R.Owen, D.J.

(2010) Cell 141: 1241

  • DOI: 10.1016/j.cell.2010.05.006

  • PubMed Abstract: 
  • The AP2 adaptor complex (alpha, beta2, sigma2, and mu2 subunits) crosslinks the endocytic clathrin scaffold to PtdIns4,5P(2)-containing membranes and transmembrane protein cargo. In the "locked" cytosolic form, AP2's binding sites for the two endocyt ...

    The AP2 adaptor complex (alpha, beta2, sigma2, and mu2 subunits) crosslinks the endocytic clathrin scaffold to PtdIns4,5P(2)-containing membranes and transmembrane protein cargo. In the "locked" cytosolic form, AP2's binding sites for the two endocytic motifs, YxxPhi on the C-terminal domain of mu2 (C-mu2) and [ED]xxxL[LI] on sigma2, are blocked by parts of beta2. Using protein crystallography, we show that AP2 undergoes a large conformational change in which C-mu2 relocates to an orthogonal face of the complex, simultaneously unblocking both cargo-binding sites; the previously unstructured mu2 linker becomes helical and binds back onto the complex. This structural rearrangement results in AP2's four PtdIns4,5P(2)- and two endocytic motif-binding sites becoming coplanar, facilitating their simultaneous interaction with PtdIns4,5P(2)/cargo-containing membranes. Using a range of biophysical techniques, we show that the endocytic cargo binding of AP2 is driven by its interaction with PtdIns4,5P(2)-containing membranes.


    Organizational Affiliation

    Cambridge Institute for Medical Research, Department of Clinical Biochemistry, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ADAPTOR-RELATED PROTEIN COMPLEX 2, ALPHA 2 SUBUNIT
A
621Rattus norvegicusMutation(s): 0 
Gene Names: Ap2a2
Find proteins for Q66HM2 (Rattus norvegicus)
Go to UniProtKB:  Q66HM2
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
AP-2 COMPLEX SUBUNIT BETA
B
592Homo sapiensMutation(s): 0 
Gene Names: AP2B1 (ADTB2, CLAPB1)
Find proteins for P63010 (Homo sapiens)
Go to Gene View: AP2B1
Go to UniProtKB:  P63010
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
AP-2 COMPLEX SUBUNIT MU,
M
446Rattus norvegicusMutation(s): 0 
Gene Names: Ap2m1
Find proteins for P84092 (Rattus norvegicus)
Go to UniProtKB:  P84092
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
TGN38 CARGO PEPTIDE
P
6N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
AP-2 COMPLEX SUBUNIT SIGMA
S
142Mus musculusMutation(s): 0 
Gene Names: Ap2s1 (Ap17, Claps2)
Find proteins for P62743 (Mus musculus)
Go to UniProtKB:  P62743
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, S
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.236 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 255.316α = 90.00
b = 255.316β = 90.00
c = 156.754γ = 120.00
Software Package:
Software NamePurpose
SHARPphasing
MOSFLMdata reduction
REFMACrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-07-21
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance