Control of plant germline proliferation by SCFFBL17 degradation of cell cycle inhibitors

Hyo Jung Kim, Sung Aeong Oh, Lynette Brownfield, Sung Hyun Hong, Hojin Ryu, Ildoo Hwang, David Twell () and Hong Gil Nam ()
Additional contact information
Hyo Jung Kim: Division of Molecular Life Sciences,
Sung Aeong Oh: University of Leicester, University Road
Lynette Brownfield: University of Leicester, University Road
Sung Hyun Hong: Division of Molecular Life Sciences,
Hojin Ryu: Division of Molecular Life Sciences,
Ildoo Hwang: Division of Molecular Life Sciences,
David Twell: University of Leicester, University Road
Hong Gil Nam: Division of Molecular Life Sciences,

Nature, 2008, vol. 455, issue 7216, 1134-1137

Abstract: Flowering plants: doubly fertile Double fertilization is a biologically unique reproduction system considered a key innovation in the evolution of flowering plants. Unlike fertilization in animals, double fertilization involves the production of a pair of sperm cells by the selective division of unequal daughter cells. Now a novel F-box protein, FBL17, has been found to promote twin sperm cell production in Arabidopsis. FBL17 targets KRP7, an inhibitor of cyclin-dependent kinases, in the male germ cells. The cell cycle regulation mechanism used by flowering plants is evolutionarily conserved between yeast and animal cells, and this new work shows how regulatory mechanisms have evolved to tailor it to special circumstances.

Date: 2008
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DOI: 10.1038/nature07289

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