Functional role of Tia1/Pub1 and Sup35 prion domains: directing protein synthesis machinery to the tubulin cytoskeleton.
Functional role of Tia1/Pub1 and Sup35 prion domains: directing protein synthesis machinery to the tubulin cytoskeleton.
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Tia1/Pub1 和 Sup35 朊病毒结构域的功能作用:将蛋白质合成机制引导至微管蛋白细胞骨架。
DOI:
10.1016/j.molcel.2014.05.027
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发表时间:
2014
期刊:
影响因子:
16
通讯作者:
Derkatch,IrinaL
中科院分区:
文献类型:
--
作者:
Li,Xiang;Rayman,JosephB;Kandel,EricR;Derkatch,IrinaL
Tia1/Pub1 is a stress granule component carrying a Q/N-rich prion domain. We provide direct evidence that Tia1 forms a prion in yeast. Moreover, Tia1/Pub1 acts cooperatively with release factor Sup35/eRF3 to establish a two-protein self-propagating state. This two-protein prion driven by the Q/N-rich prion domains of Sup35 and Tia1/Pub1 can be visualized as distinctive line structures along tubulin cytoskeleton. Furthermore, we find that tubulin-associated complex containing Pub1 and Sup35 oligomers normally exists in yeast, and its assembly depends on prion domains of Pub1 and Sup35. This Sup35/Pub1 complex, which also containsTUB1mRNA and components of translation machinery, is important for the integrity of the tubulin cytoskeleton:PUB1disruption and Sup35 depletion from the complex lead to cytoskeletal defects. We propose that the complex is implicated in protein synthesis at the site of microtubule assembly. Thus our study identifies the role for prion domains in the assembly of multiprotein complexes.
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影响因子:
11.1
作者:
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通讯作者:
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影响因子:
3.3
作者:
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作者:
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