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Science. 2007 May 18;316(5827):1046-50. Epub 2007 Apr 26.

Revisiting the role of the mother centriole in centriole biogenesis.

Author information

1
Instituto Gulbenkian de Ciência, Cell Cycle Regulation Laboratory, Rua da Quinta Grande, 6, P-2780-156 Oeiras, Portugal.

Abstract

Centrioles duplicate once in each cell division cycle through so-called templated or canonical duplication. SAK, also called PLK4 (SAK/PLK4), a kinase implicated in tumor development, is an upstream regulator of canonical biogenesis necessary for centriole formation. We found that overexpression of SAK/PLK4 could induce amplification of centrioles in Drosophila embryos and their de novo formation in unfertilized eggs. Both processes required the activity of DSAS-6 and DSAS-4, two molecules required for canonical duplication. Thus, centriole biogenesis is a template-free self-assembly process triggered and regulated by molecules that ordinarily associate with the existing centriole. The mother centriole is not a bona fide template but a platform for a set of regulatory molecules that catalyzes and regulates daughter centriole assembly.

PMID:
17463247
DOI:
10.1126/science.1142950
[Indexed for MEDLINE]
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