1B9K image
Deposition Date 1999-02-11
Release Date 1999-07-06
Last Version Date 2023-12-27
Entry Detail
PDB ID:
1B9K
Title:
ALPHA-ADAPTIN APPENDAGE DOMAIN, FROM CLATHRIN ADAPTOR AP2
Biological Source:
Source Organism:
Mus musculus (Taxon ID: 10090)
Host Organism:
Method Details:
Experimental Method:
Resolution:
1.90 Å
R-Value Free:
0.22
R-Value Work:
0.16
R-Value Observed:
0.17
Space Group:
P 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:PROTEIN (ALPHA-ADAPTIN APPENDAGE DOMAIN)
Gene (Uniprot):Ap2a2
Chain IDs:A
Chain Length:238
Number of Molecules:1
Biological Source:Mus musculus
Primary Citation
A structural explanation for the binding of multiple ligands by the alpha-adaptin appendage domain.
Cell(Cambridge,Mass.) 97 805 815 (1999)
PMID: 10380931 DOI: 10.1016/S0092-8674(00)80791-6

Abstact

The alpha subunit of the endocytotic AP2 adaptor complex contains a 30 kDa "appendage" domain, which is joined to the rest of the protein via a flexible linker. The 1.9 A resolution crystal structure of this domain reveals a single binding site for its ligands, which include amphiphysin, Eps15, and epsin. This domain when overexpressed in COS7 fibroblasts is shown to inhibit transferrin uptake, whereas mutants in which interactions with its binding partners are abolished do not. DPF/W motifs present in appendage domain-binding partners are shown to play a crucial role in their interactions with the domain. A single site for binding multiple ligands would allow for temporal and spatial regulation in the recruitment of components of the endocytic machinery.

Legend

Protein

Chemical

Disease

Primary Citation of related structures