Stress granules and cell signaling: more than just a passing phase?
Stress granules and cell signaling: more than just a passing phase?
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DOI:
10.1016/j.tibs.2013.07.004
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发表时间:
2013-10
影响因子:
13.8
通讯作者:
Anderson, Paul
中科院分区:
文献类型:
--
作者:
Kedersha, Nancy;Ivanov, Pavel;Anderson, Paul
Stress granules (SGs) contain translationally-stalled mRNAs, associated preinitiation factors and specific RNA-binding proteins. In addition, many signaling proteins are recruited to SGs and/or influence their assembly, which is transient, lasting only until the cells adapt to stress or die. Beyond their role as mRNA triage centers, we posit that SGs constitute RNA-centric signaling hubs analogous to classical multiprotein signaling domains such as transmembrane receptor complexes. As signaling centers, SG formation communicates a “state of emergency”, and their transient existence alters multiple signaling pathways by intercepting and sequestering signaling components. SG assembly and downstream signaling functions may require a cytosolic phase transition facilitated by intrinsically disordered, aggregation-prone protein regions shared by RNA-binding and signaling proteins.
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