p62 is a key regulator of nutrient sensing in the mTORC1 pathway.

p62 is a key regulator of nutrient sensing in the mTORC1 pathway.
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DOI:
10.1016/j.molcel.2011.06.038
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发表时间:
2011-10-07
期刊:
影响因子:
16
通讯作者:
Diaz-Meco MT
Diaz-Meco MT
中科院分区:
生物学1区
文献类型:
--
作者:
Duran A;Amanchy R;Linares JF;Joshi J;Abu-Baker S;Porollo A;Hansen M;Moscat J;Diaz-Meco MT

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信号转接子p62是重要的细胞功能的重要介体,因为它能够与各种信号媒介建立相互作用。在这里,我们将猛禽识别为p62的互动伙伴。因此,p62是mTORC1复合体的组成部分,是介导S6K1和4EBP1激活的氨基酸信号转导所必需的。P62与mTOR和Raptor以氨基酸依赖的方式相互作用。此外,p62与RAGS蛋白结合,并促进活性RAG异源二聚体的形成,该异二聚体进一步被Raptor稳定。有趣的是,p62与RAGS共定位在溶酶体内,是mTOR与RAg GTP酶在体内相互作用所必需的,也是mTORC1复合体移位到溶酶体内所必需的,这是mTOR激活的关键步骤。
The signaling adapter p62 is a critical mediator of important cellular functions owing to its ability to establish interactions with various signaling intermediaries. Here we identify raptor as an interacting partner of p62. Thus, p62 is an integral part of the mTORC1 complex, and is necessary to mediate amino acid signaling for the activation of S6K1 and 4EBP1. p62 interacts in an amino acid-dependent manner with mTOR and raptor. In addition, p62 binds the Rags proteins and favors formation of the active Rag heterodimer that is further stabilized by raptor. Interestingly, p62 colocalizes with Rags at the lysosomal compartment and is required for the interaction of mTOR with Rag GTPases in vivo, and for translocation of the mTORC1 complex to the lysosome, a crucial step for mTOR activation.
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