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  4. Zyg-11 and cul-2 regulate progression through meiosis II and polarity establishment in C. elegans
 
research article

Zyg-11 and cul-2 regulate progression through meiosis II and polarity establishment in C. elegans

Sonneville, R.
•
Gönczy, P.  
2004
Development

The mechanisms that ensure coupling between meiotic cell cycle progression and subsequent developmental events, including specification of embryonic axes, are poorly understood. Here, we establish that zyg-11 and the cullin cul-2 promote the metaphase-to-anaphase transition and M phase exit at meiosis II in Caenorhabditis elegans. Our results indicate that ZYG-11 acts with a CUL-2-based E3 ligase that is essential at meiosis II and that functions redundantly with the anaphase-promoting complex/cyclosome at meiosis I. Our data also indicate that delayed M phase exit in zyg-11(RNAi) embryos is due to accumulation of the B type cyclin CYB-3. We demonstrate that PAR proteins and P granules become polarized in an inverted manner during the meiosis II delay resulting from zyg-11 or cul-2 inactivation, and that zyg-11 and cul-2 can regulate polarity establishment independently of a role in cell cycle progression. Furthermore, we find that microtubules appear dispensable for ectopic polarity during the meiosis II delay in zyg-11(RNAi) embryos, as well as for AP polarity during the first mitotic cell cycle in wild-type embryos. Our findings suggest a model in which a CUL-2-based E3 ligase promotes cell cycle progression and prevents polarity establishment during meiosis II, and in which the centrosome acts as a cue to polarize the embryo along the AP axis after exit from the meiotic cell cycle.

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Type
research article
DOI
10.1242/dev.01244
PubMed ID

15215208

Author(s)
Sonneville, R.
Gönczy, P.  
Date Issued

2004

Published in
Development
Volume

131

Issue

15

Start page

3527

End page

43

Subjects

Animals

•

Biological Markers

•

*Body Patterning

•

Caenorhabditis elegans/*embryology

•

Caenorhabditis elegans Proteins/genetics/*metabolism

•

Cell Cycle Proteins/genetics/*metabolism

•

Cell Polarity

•

Cullin Proteins/genetics/*metabolism

•

Cyclin B/genetics/*metabolism

•

Cytoskeleton/metabolism

•

Female

•

Meiosis/*physiology

•

Microtubules/metabolism

•

Morphogenesis

•

Nuclear Proteins/metabolism

•

RNA Interference

•

Recombinant Fusion Proteins/genetics/metabolism

•

Research Support

•

Non-U.S. Gov't

Note

ISREC (Swiss Institute for Experimental Cancer Research Boveresses, CH-1066 Epalinges/Lausanne, Switzerland.

Journal Article

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
UPGON  
Available on Infoscience
August 24, 2006
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/233791
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