Signal transduction: Splicing together the unfolded-protein response

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Signal transduction: Splicing together the unfolded-protein response

Cells respond to the accumulation of unfolded proteins in the endoplasmic reticulum (ER) by increasing the production of ER-resident chaperones, such as BiP and protein disulfide isomerase (PDI), that expedite protein folding and assembly in the ER lumen. In organisms as diverse as yeast and humans, this is accomplished by increasing the transcription of the genes that encode these chaperones. ...

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Splicing: HACking into the unfolded-protein response

Unfolded proteins in the endoplasmic reticulum of Saccharomyces cerevisiae trigger a specialized RNA splicing event that allows the subsequent translation of the Hac1p transcription factor. This splicing can be reconstituted with Ire1p, a transmembrane kinase that has a site-specific RNase activity, and tRNA ligase.

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Unfolded protein response mediated JNK/AP-1 signal transduction, a target for ovarian cancer treatment.

Researches have revealed several stressors, which could activate unfolded protein response (UPR) in cells. However, the survival or death pathway was determined by the duration of UPR exposure. Based on the UPR mediated death pathway, our study was aimed to investigate role of UPR on c-Jun N-terminal kinase (JNK)/activator protein-1 (Ap-1) signal transduction in diindolylmethane (DIM) treated o...

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The unfolded protein response

Where does the UPR function? Between the endoplasmic reticulum (ER) and the nucleus of eukaryotic cells. All secreted proteins and proteins that reside in secretory compartments translocate as nascent peptide chains into the ER, where they may undergo folding, modification and assembly before assuming their functional conformations. The ER maintains a specialized oxidizing environment to aid ch...

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The unfolded protein response.

The endoplasmic reticulum (ER) is a principal site for folding and maturation of transmembrane, secretory and ERresident proteins. Perturbations that alter ER homeostasis can lead to accumulation of unfolded proteins (UPs), which is a threat to all living cells. To cope with the stress, cells activate an intracellular signaling pathway – the unfolded protein response (UPR). The UPR is an integr...

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ژورنال

عنوان ژورنال: Current Biology

سال: 1997

ISSN: 0960-9822

DOI: 10.1016/s0960-9822(06)00038-8