NtKRP, a kinesin-12 protein, regulates embryo/seed size and seed germination via involving in cell cycle progression at the G2/M transition.
NtKRP, a kinesin-12 protein, regulates embryo/seed size and seed germination via involving in cell cycle progression at the G2/M transition.
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NtKRP 是一种驱动蛋白 12 蛋白,通过参与 G2/M 转变的细胞周期进程来调节胚胎/种子大小和种子萌发
DOI:
10.1038/srep35641
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发表时间:
2016-10-25
影响因子:
4.6
通讯作者:
Sun MX
中科院分区:
文献类型:
--
作者:
Tian S;Wu J;Li F;Zou J;Liu Y;Zhou B;Bai Y;Sun MX
Kinesins comprise a superfamily of microtubule-based motor proteins involved in essential processes in plant development, but few kinesins have been functionally identified during seed development. Especially, few kinesins that regulate cell division during embryogenesis have been identified. Here we report the functional characterization of NtKRP, a motor protein of the kinesin-12 family.NtKRPis predominantly expressed in embryos and embryonic roots.NtKRPRNAi lines displayed reductions in cell numbers in the meristematic zone, in embryonic root length, and in mature embryo and seed sizes. Furthermore, we also show that CDKA;1 binds to NtKRP at the consensus phosphorylation sites and that the decreased cell numbers inNtKRP-silenced embryos are due to a delay in cell division cycle at the G2/M transition. In addition, binding between the cargo-binding tail domain of NtKRP and CDKA; 1 was also determined. Our results reveal a novel molecular pathway that regulates embryo/seed development and critical role of kinesin in temporal and spatial regulation of a specific issue of embryo developmental.
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