Dissecting the role of Aurora A during spindle assembly.
EMBO J
; 27(19): 2567-79, 2008 Oct 08.
Article
em En
| MEDLINE
| ID: mdl-18756265
ABSTRACT
The centrosomal kinase Aurora A (AurA) is required for cell cycle progression, centrosome maturation and spindle assembly. However, the way it participates in spindle assembly is still quite unclear. Using the Xenopus egg extract system, we have dissected the role of AurA in the different microtubule (MT) assembly pathways involved in spindle formation. We developed a new tool based on the activation of AurA by TPX2 to clearly define the requirements for localization and activation of the kinase during spindle assembly. We show that localized AurA kinase activity is required to target factors involved in MT nucleation and stabilization to the centrosome, therefore promoting the formation of a MT aster. In addition, AurA strongly enhances MT nucleation mediated by the Ran pathway through cytoplasmic phosphorylation. Altogether, our data show that AurA exerts an effect as a key regulator of MT assembly during M phase and therefore of bipolar spindle formation.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Oócitos
/
Proteínas Serina-Treonina Quinases
/
Fuso Acromático
Limite:
Animals
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article