Signaling networks converge on TORC1-SREBP activity to promote endoplasmic reticulum homeostasis.
Signaling networks converge on TORC1-SREBP activity to promote endoplasmic reticulum homeostasis.
复制标题
信号网络汇聚于TORC 1-SREBP活性以促进内质网稳态。
DOI:
10.1371/journal.pone.0101164
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Bakal C
中科院分区:
文献类型:
--
作者:
Sanchez-Alvarez M;Finger F;Arias-Garcia Mdel M;Bousgouni V;Pascual-Vargas P;Bakal C
The function and capacity of the endoplasmic reticulum (ER) is determined by multiple processes ranging from the local regulation of peptide translation, translocation, and folding, to global changes in lipid composition. ER homeostasis thus requires complex interactions amongst numerous cellular components. However, describing the networks that maintain ER function during changes in cell behavior and environmental fluctuations has, to date, proven difficult. Here we perform a systems-level analysis of ER homeostasis, and find that although signaling networks that regulate ER function have a largely modular architecture, the TORC1-SREBP signaling axis is a central node that integrates signals emanating from different sub-networks. TORC1-SREBP promotes ER homeostasis by regulating phospholipid biosynthesis and driving changes in ER morphology. In particular, our network model shows TORC1-SREBP serves to integrate signals promoting growth and G1-S progression in order to maintain ER function during cell proliferation.
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