Yeast centrin Cdc31 is linked to the nuclear mRNA export machinery

被引:147
作者
Fischer, T
Rodríguez-Navarro, S
Pereira, G
Rácz, A
Schiebel, E
Hurt, E
机构
[1] Univ Heidelberg BZH, Zentrum Biochem, D-69120 Heidelberg, Germany
[2] Christie Hosp NHS Trust, Paterson Inst Canc Res, Manchester M20 4BX, Lancs, England
关键词
D O I
10.1038/ncb1163
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Centrins are calmodulin-like proteins that function in the duplication of microtubule-organizing centres. Here we describe a new function of the yeast centrin Cdc31. We show that overproduction of a sequence, termed CID, in the carboxy-terminal domain of the nuclear export factor Sac3 titrates Cdc31, causing a dominant-lethal phenotype and a block in spindle pole body (SPB) duplication. Under normal conditions, the CID motif recruits Cdc31 and Sus1 (a subunit of the SAGA transcription complex) to the Sac3-Thp1 complex, which functions in mRNA export together with specific nucleoporins at the nuclear basket. A previously reported cdc31 temperature-sensitive allele, which is neither defective in SPB duplication nor Kic1 kinase activation, induces mRNA export defects. Thus, Cdc31 has an unexpected link to the mRNA export machinery.
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收藏
页码:840 / U4
页数:10
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