Crystal structure of the APC10/DOC1 subunit of the human anaphase-promoting complex.
Nat Struct Biol
; 8(9): 784-8, 2001 Sep.
Article
en En
| MEDLINE
| ID: mdl-11524682
ABSTRACT
The anaphase-promoting complex (APC), or cyclosome, is a cell cycle-regulated ubiquitin ligase that controls progression through mitosis and the G1 phase of the cell cycle. The APC is composed of at least 11 subunits; no structure has been determined for any of these subunits. The subunit APC10/DOC1, a one-domain protein consisting of 185 amino acids, has a conserved core (residues 22-161) that is homologous to domains found in several other putative ubiquitin ligases and, therefore, may play a role in ubiquitination reactions. Here we report the crystal structure of human APC10 at 1.6 A resolution. The core of the protein is formed by a beta-sandwich that adopts a jellyroll fold. Unexpectedly, this structure is highly similar to ligand-binding domains of several bacterial and eukaryotic proteins, such as galactose oxidase and coagulation factor Va, raising the possibility that APC10 may function by binding a yet unidentified ligand. We further provide biochemical evidence that the C-terminus of APC10 binds to CDC27/APC3, an APC subunit that contains multiple tetratrico peptide repeats.
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Base de datos:
MEDLINE
Asunto principal:
Proteínas de Ciclo Celular
/
Complejos de Ubiquitina-Proteína Ligasa
/
Ligasas
Tipo de estudio:
Prognostic_studies
Límite:
Humans
Idioma:
En
Revista:
Nat Struct Biol
Asunto de la revista:
BIOLOGIA MOLECULAR
Año:
2001
Tipo del documento:
Article
País de afiliación:
Alemania