4UQI

AP2 controls clathrin polymerization with a membrane-activated switch


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.79 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Clathrin Adaptors. Ap2 Controls Clathrin Polymerization with a Membrane-Activated Switch.

Kelly, B.T.Graham, S.C.Liska, N.Dannhauser, P.N.Honing, S.Ungewickell, E.J.Owen, D.J.

(2014) Science 345: 459

  • DOI: 10.1126/science.1254836

  • PubMed Abstract: 
  • Clathrin-mediated endocytosis (CME) is vital for the internalization of most cell-surface proteins. In CME, plasma membrane-binding clathrin adaptors recruit and polymerize clathrin to form clathrin-coated pits into which cargo is sorted. Assembly po ...

    Clathrin-mediated endocytosis (CME) is vital for the internalization of most cell-surface proteins. In CME, plasma membrane-binding clathrin adaptors recruit and polymerize clathrin to form clathrin-coated pits into which cargo is sorted. Assembly polypeptide 2 (AP2) is the most abundant adaptor and is pivotal to CME. Here, we determined a structure of AP2 that includes the clathrin-binding β2 hinge and developed an AP2-dependent budding assay. Our findings suggest that an autoinhibitory mechanism prevents clathrin recruitment by cytosolic AP2. A large-scale conformational change driven by the plasma membrane phosphoinositide phosphatidylinositol 4,5-bisphosphate and cargo relieves this autoinhibition, triggering clathrin recruitment and hence clathrin-coated bud formation. This molecular switching mechanism can couple AP2's membrane recruitment to its key functions of cargo and clathrin binding.


    Organizational Affiliation

    Cambridge Institute for Medical Research (CIMR), Department of Clinical Biochemistry, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK. btk1000@cam.ac.uk djo30@cam.ac.uk.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AP-2 COMPLEX SUBUNIT ALPHA-2
A
628Rattus norvegicusMutation(s): 0 
Gene Names: Ap2a2 (Adtab)
Find proteins for P18484 (Rattus norvegicus)
Go to UniProtKB:  P18484
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
AP-2 COMPLEX SUBUNIT BETA
B
657Homo 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
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 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

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

Download SDF File 
Download CCD File 
A
INOSITOL HEXAKISPHOSPHATE
C6 H18 O24 P6
IMQLKJBTEOYOSI-GPIVLXJGSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.79 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.203 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 121.300α = 90.00
b = 121.300β = 90.00
c = 259.370γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
REFMACrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-07-30
    Type: Initial release
  • Version 1.1: 2014-08-06
    Type: Database references