Plk4-dependent phosphorylation of STIL is required for centriole duplication.
Plk4-dependent phosphorylation of STIL is required for centriole duplication.
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DOI:
10.1242/bio.201411023
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发表时间:
2015-02-20
期刊:
影响因子:
2.4
通讯作者:
Hoffmann I
中科院分区:
文献类型:
--
作者:
Kratz AS;Bärenz F;Richter KT;Hoffmann I
Duplication of centrioles, namely the formation of a procentriole next to the parental centriole, is regulated by the polo-like kinase Plk4. Only a few other proteins, including STIL (SCL/TAL1 interrupting locus, SIL) and Sas-6, are required for the early step of centriole biogenesis. Following Plk4 activation, STIL and Sas-6 accumulate at the cartwheel structure at the initial stage of the centriole assembly process. Here, we show that STIL interacts with Plk4 in vivo. A STIL fragment harboring both the coiled-coil domain and the STAN motif shows the strongest binding affinity to Plk4. Furthermore, we find that STIL is phosphorylated by Plk4. We identified Plk4-specific phosphorylation sites within the C-terminal domain of STIL and show that phosphorylation of STIL by Plk4 is required to trigger centriole duplication.
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