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Open AccessJournal ArticleDOI

Stress granules and cell signaling: more than just a passing phase?

TLDR
It is argued that stress granules constitute RNA-centric signaling hubs analogous to classical multiprotein signaling domains such as transmembrane receptor complexes and 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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This article is published in Trends in Biochemical Sciences.The article was published on 2013-10-01 and is currently open access. It has received 512 citations till now. The article focuses on the topics: Cell signaling & Stress granule.

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Citations
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Journal ArticleDOI

Intrinsically disordered proteins in cellular signalling and regulation.

TL;DR: Experimental, computational and bioinformatic analyses combine to identify and characterize disordered regions of proteins, leading to a greater appreciation of their widespread roles in biological processes.
Journal ArticleDOI

Protein Phase Separation: A New Phase in Cell Biology.

TL;DR: A combination of techniques from cell biology, biophysics, physical chemistry, structural biology, and bioinformatics are starting to help establish the molecular principles of an emerging field, thus paving the way for exciting discoveries, including novel therapeutic approaches for the treatment of age-related disorders.
Journal ArticleDOI

Distinct stages in stress granule assembly and disassembly

TL;DR: It is argued that stress granules assemble through a multistep process initiated by stable assembly of untranslated mRNPs into core structures, which could provide sufficient high local concentrations to allow for a localized LLPS driven by IDRs on RNA binding proteins.
References
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Signal integration in the endoplasmic reticulum unfolded protein response

TL;DR: Together, at least three mechanistically distinct arms of the UPR regulate the expression of numerous genes that function within the secretory pathway but also affect broad aspects of cell fate and the metabolism of proteins, amino acids and lipids.
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AMPK phosphorylation of raptor mediates a metabolic checkpoint.

TL;DR: AMPK directly phosphorylates the mTOR binding partner raptor on two well-conserved serine residues, and this phosphorylation induces 14-3-3 binding to raptor, uncovering a conserved effector of AMPK that mediates its role as a metabolic checkpoint coordinating cell growth with energy status.
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The unfolded protein response: controlling cell fate decisions under ER stress and beyond

TL;DR: Insight is provided into the regulatory mechanisms and signalling crosstalk of the three branches of the UPR, which are initiated by the stress sensors protein kinase RNA-like ER kinase (PERK), inositol-requiring protein 1α (IRE1α) and activating transcription factor 6 (ATF6).
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Regulated Translation Initiation Controls Stress-Induced Gene Expression in Mammalian Cells

TL;DR: Protein kinases that phosphorylate the alpha subunit of eukaryotic initiation factor 2 (eIF2alpha) are activated in stressed cells and negatively regulate protein synthesis, resulting in the induction of the downstream gene CHOP (GADD153).
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Coupling of stress in the ER to activation of JNK protein kinases by transmembrane protein kinase IRE1.

TL;DR: Malfolded proteins in the endoplasmic reticulum induce cellular stress and activate c-Jun amino-terminal kinases (JNKs or SAPKs), and Mammalian homologs of yeast IRE1, which activate chaperone genes in response to ER stress, also activated JNK, and I RE1alpha-/- fibroblasts were impaired in JNK activation by ER stress.
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