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  A cdk1 gradient guides surface contraction waves in oocytes.

Bischof, J., Brand, C. A., Somogyi, K., Májer, I., Thome, S., Mori, M., et al. (2017). A cdk1 gradient guides surface contraction waves in oocytes. Nature Communications, 8: 849. doi:10.1038%2Fs41467-017-00979-6.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-0CB9-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-0CBE-C
Genre: Journal Article

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 Creators:
Bischof, J., Author
Brand, C. A., Author
Somogyi, K., Author
Májer, I., Author
Thome, S., Author
Mori, M., Author
Schwarz, U. S., Author
Lenart, P.1, Author              
Affiliations:
1Research Group of Cytoskeletal Dynamics in Oocytes, MPI for Biophysical Chemistry, Max Planck Society, ou_2640691              

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 Abstract: Surface contraction waves (SCWs) in oocytes and embryos lead to large-scale shape changes coupled to cell cycle transitions and are spatially coordinated with the cell axis. Here, we show that SCWs in the starfish oocyte are generated by a traveling band of myosin II-driven cortical contractility. At the front of the band, contractility is activated by removal of cdk1 inhibition of the RhoA/RhoA kinase/myosin II signaling module, while at the rear, contractility is switched off by negative feedback originating downstream of RhoA kinase. The SCW’s directionality and speed are controlled by a spatiotemporal gradient of cdk1-cyclinB. This gradient is formed by the release of cdk1-cyclinB from the asymmetrically located nucleus, and progressive degradation of cyclinB. By combining quantitative imaging, biochemical and mechanical perturbations with mathematical modeling, we demonstrate that the SCWs result from the spatiotemporal integration of two conserved regulatory modules, cdk1-cyclinB for cell cycle regulation and RhoA/Rok/NMYII for actomyosin contractility.

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Language(s): eng - English
 Dates: 2017-10-11
 Publication Status: Published online
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 Rev. Method: Peer
 Identifiers: DOI: 10.1038%2Fs41467-017-00979-6
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Title: Nature Communications
Source Genre: Journal
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Pages: - Volume / Issue: 8 Sequence Number: 849 Start / End Page: - Identifier: -