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Towards understanding centriole elimination

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Overly long centrioles and defective cell division upon excess of the SAS-4-related protein CPAP

Pierre Gönczy, Gregor Kohlmaier

The centrosome is the principal microtubule organizing center (MTOC) of animal cells. Accurate centrosome duplication is fundamental for genome integrity and entails the formation of one procentriole next to each existing centriole, once per cell cycle. Th ...

2009

The early Caenorhabditis elegans embryo is well suited for investigating microtubule-dependent cell division processes. In the one-cell stage, the XMAP215 homologue ZYG-9, associated with the TACC protein TAC-1, promotes microtubule growth during interphas ...

2007

Regulated HsSAS-6 levels ensure formation of a single procentriole per centriole during the centrosome duplication cycle

Pierre Gönczy, Petr Strnad

Centrosome duplication involves the formation of a single procentriole next to each centriole, once per cell cycle. The mechanisms governing procentriole formation and those restricting its occurrence to one event per centriole are poorly understood. Here, ...

2007

lis-1 is required for dynein-dependent cell division processes in C. elegans embryos

Pierre Gönczy

We investigated the role of the evolutionarily conserved protein Lis1 in cell division processes of Caenorhabditis elegans embryos. We identified apparent null alleles of lis-1, which result in defects identical to those observed after inactivation of the ...

2004

Centriolar SAS-5 is required for centrosome duplication in C. elegans

Pierre Gönczy

Centrosomes, the major microtubule-organizing centres (MTOCs) of animal cells, are comprised of a pair of centrioles surrounded by pericentriolar material (PCM). Early in the cell cycle, there is a single centrosome, which duplicates during S-phase to dire ...

2004

The arithmetic of centrosome biogenesis

Pierre Gönczy

How do cells regulate centrosome number? A canonical duplication cycle generates two centrosomes from one in most proliferating cells. Centrioles are key to this process, and molecules such as centrins, SAS-4 and ZYG-1 govern daughter centriole formation. ...

Company of Biologists2004

TAC-1 and ZYG-9 form a complex that promotes microtubule assembly in C. elegans embryos

Pierre Gönczy

BACKGROUND: Modulation of microtubule dynamics is crucial for proper cell division. While a large body of work has made important contributions to our understanding of the mechanisms governing microtubule dynamics in vitro, much remains to be learned about ...

2003

[Mechanisms of cell division: lessons from a nematode]

Pierre Gönczy

The mechanisms orchestrating spatial cell division control remain poorly understood. In animal cells, the position of the mitotic spindle dictates cleavage furrow placement, and thus plays a key role in governing spatial relationships between resulting dau ...

2003

Cell divisions that create daughter cells of different sizes are crucial for the generation of cell diversity during animal development. In such asymmetric divisions, the mitotic spindle must be asymmetrically positioned at the end of anaphase. The mechani ...

2001

A number of fundamental processes comprise the cell division cycle, including spindle formation, chromosome segregation, and cytokinesis. Our current understanding of these processes has benefited from the isolation and analysis of mutants, with the meioti ...

2001