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  • Title: Ire1 regulated XBP1 mRNA splicing is essential for the unfolded protein response (UPR) in Drosophila melanogaster.
    Author: Plongthongkum N, Kullawong N, Panyim S, Tirasophon W.
    Journal: Biochem Biophys Res Commun; 2007 Mar 16; 354(3):789-94. PubMed ID: 17266933.
    Abstract:
    The ability of cells to survive and recover from deteriorating effects of endoplasmic reticulum (ER) stress relies on the unfolded protein response (UPR). The signaling pathway of Ire1p mediate mRNA splicing plays diverge role in UPR response in different organisms from yeast to mammals. Here, we report that Ire1p mediated XBP1 mRNA splicing mechanism is extremely conserved and exerts a critical role for modulating Xbp1 protein synthesis in Drosophila melanogaster. This system is operative in Drosophila S2 cells as a prominent mechanism to mediate transcriptional activation of UPR responsive genes during ER stress.
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