Tubulin nucleotide status controls Sas-4-dependent pericentriolar material recruitment.
Tubulin nucleotide status controls Sas-4-dependent pericentriolar material recruitment.
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DOI:
10.1038/ncb2527
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发表时间:
2012-08
影响因子:
21.3
通讯作者:
中科院分区:
文献类型:
--
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Regulated centrosome biogenesis is required for accurate cell division and for maintaining genome integrity. Centrosomes consist of a centriole pair surrounded by a protein network known as pericentriolar material (PCM). PCM assembly is a tightly regulated, critical step that determines a centrosome’s size and capability. Here, we report a role for tubulin in regulating PCM recruitment via the conserved centrosomal protein Sas-4. Tubulin directly binds to Sas-4; together they are components of cytoplasmic complexes of centrosomal proteins. A Sas-4 mutant, which cannot bind tubulin, enhances centrosomal protein complex formation and has abnormally large centrosomes with excessive activity. These suggest that tubulin negatively regulates PCM recruitment. Whereas tubulin-GTP prevents Sas-4 from forming protein complexes, tubulin-GDP promotes it. Thus, tubulin’s regulation of PCM recruitment depends on its GTP/GDP-bound state. These results identify a role for tubulin in regulating PCM recruitment independent of its well-known role as a building block of microtubules. Based on its guanine bound state, tubulin can act as a molecular switch in PCM recruitment.
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影响因子:
7.8
作者:
MORITZ, M;BRAUNFELD, MB;AGARD, DA
通讯作者:
AGARD, DA
影响因子:
9.2
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Conduit, Paul T.;Brunk, Kathrin;Raff, Jordan W.
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Raff, Jordan W.
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4.8
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Curmi, Patrick A.
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通讯作者:
Hyman, AA
影响因子:
2.9
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MELKI, R;CARLIER, MF;TIMASHEFF, SN
通讯作者:
TIMASHEFF, SN