Acto-myosin reorganization and PAR polarity in C. elegans

Cowan, Carrie R.; Hyman, Anthony A.

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Acto-myosin reorganization and PAR polarity in C. elegans

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Cowan, Carrie R.
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Hyman, Anthony A.
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Cowan, C. R., & Hyman, A. A. (2007). Acto-myosin reorganization and PAR polarity in C. elegans. Development, 134(6), 1035-1043.

Cite as: https://hdl.handle.net/21.11116/0000-0001-0EFE-3

Abstract

The symmetry-breaking event during polarization of C. elegans embryos is an asymmetric rearrangement of the acto-myosin network, which dictates cell polarity through the differential recruitment of PAR proteins. The sperm-supplied centrosomes are required to initiate this cortical reorganization. Several questions about this event remain unanswered: how is the acto-myosin network regulated during polarization and how does acto-myosin reorganization lead to asymmetric PAR protein distribution? As we discuss, recent studies show that C. elegans embryos use two GTPases, RHO-1 and CDC-42, to regulate these two steps in polarity establishment. Although RHO-1 and CDC-42 control distinct aspects of polarization, they function interdependently to regulate polarity establishment in C. elegans embryos.