2VGL image
Deposition Date 2007-11-14
Release Date 2007-12-25
Last Version Date 2024-05-08
Entry Detail
PDB ID:
2VGL
Title:
AP2 CLATHRIN ADAPTOR CORE
Biological Source:
Source Organism:
RATTUS NORVEGICUS (Taxon ID: 10116)
HOMO SAPIENS (Taxon ID: 9606)
MUS MUSCULUS (Taxon ID: 10090)
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.60 Å
R-Value Free:
0.33
R-Value Work:
0.26
R-Value Observed:
0.26
Space Group:
P 31 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:ADAPTOR PROTEIN COMPLEX AP-2, ALPHA 2 SUBUNIT
Chain IDs:A
Chain Length:621
Number of Molecules:1
Biological Source:RATTUS NORVEGICUS
Polymer Type:polypeptide(L)
Molecule:AP-2 COMPLEX SUBUNIT BETA-1
Gene (Uniprot):AP2B1
Chain IDs:B
Chain Length:591
Number of Molecules:1
Biological Source:HOMO SAPIENS
Polymer Type:polypeptide(L)
Molecule:AP-2 COMPLEX SUBUNIT MU-1
Gene (Uniprot):Ap2m1
Chain IDs:C (auth: M)
Chain Length:435
Number of Molecules:1
Biological Source:RATTUS NORVEGICUS
Polymer Type:polypeptide(L)
Molecule:AP-2 COMPLEX SUBUNIT SIGMA-1
Gene (Uniprot):Ap2s1
Chain IDs:D (auth: S)
Chain Length:142
Number of Molecules:1
Biological Source:MUS MUSCULUS
Ligand Molecules
Primary Citation
Molecular Architecture and Functional Model of the Endocytic Ap2 Complex
Cell(Cambridge,Mass.) 109 523 ? (2002)
PMID: 12086608 DOI: 10.1016/S0092-8674(02)00735-3

Abstact

AP2 is the best-characterized member of the family of heterotetrameric clathrin adaptor complexes that play pivotal roles in many vesicle trafficking pathways within the cell. AP2 functions in clathrin-mediated endocytosis, the process whereby cargo enters the endosomal system from the plasma membrane. We describe the structure of the 200 kDa AP2 "core" (alpha trunk, beta2 trunk, mu2, and sigma2) complexed with the polyphosphatidylinositol headgroup mimic inositolhexakisphosphate at 2.6 A resolution. Two potential polyphosphatidylinositide binding sites are observed, one on alpha and one on mu2. The binding site for Yxxphi endocytic motifs is buried, indicating that a conformational change, probably triggered by phosphorylation in the disordered mu2 linker, is necessary to allow Yxxphi motif binding. A model for AP2 recruitment and activation is proposed.

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Primary Citation of related structures