655 results found
    1. Cell Biology
    2. Developmental Biology

    The transcription factor Xrp1 orchestrates both reduced translation and cell competition upon defective ribosome assembly or function

    Marianthi Kiparaki, Chaitali Khan ... Nicholas E Baker
    Ribosomal protein mutations, mutations that affect ribosomal RNA synthesis, or function of the mature ribosome, trigger a transcriptional response mediated by Xrp1 expression which reduces cellular translation via eIF2-alpha phosphorylation and renders cells liable to competition with wild-type neighbors.
    1. Genetics and Genomics

    The transcription factor Xrp1 is required for PERK-mediated antioxidant gene induction in Drosophila

    Brian Brown, Sahana Mitra ... Hyung Don Ryoo
    The transcription factor Xrp1 mediates a previously unrecognized branch of stress-response signaling, specifically as a downstream effector of eIF2alpha kinases.
    1. Cell Biology

    Live imaging of the co-translational recruitment of XBP1 mRNA to the ER and its processing by diffuse, non-polarized IRE1α

    Silvia Gómez-Puerta, Roberto Ferrero ... Franka Voigt
    Development of a live single-molecule imaging approach to visualize XBP1 mRNAs, which are recruited for translation on the ER and efficiently spliced in the absence of large IRE1α foci.
    1. Cancer Biology
    2. Cell Biology

    Fine-tuned repression of Drp1-driven mitochondrial fission primes a ‘stem/progenitor-like state’ to support neoplastic transformation

    Brian Spurlock, Danitra Parker ... Kasturi Mitra
    A mitochondria-based 'priming' of stemness happens by fine-tuned repression of the level or activity of the master regulator of mitochondrial fission, Drp1, which supports carcinogen-induced transformation in a keratinocyte model.
    1. Developmental Biology

    Roles of C/EBP class bZip proteins in the growth and cell competition of Rp (‘Minute’) mutants in Drosophila

    Jorge Blanco, Jacob C Cooper, Nicholas E Baker
    Xrp1 contributes to cell competition as a heterodimer with the Drosophila C/EBP homolog Irbp18 and although rapidly evolving is itself conserved beyond Drosophila.
    1. Developmental Biology
    2. Evolutionary Biology

    Xbp1 and Brachyury establish an evolutionarily conserved subcircuit of the notochord gene regulatory network

    Yushi Wu, Arun Devotta ... Anna Di Gregorio
    Research carried out in the simple chordate Ciona has elucidated the regulatory interplay between two evolutionarily conserved transcription factors, Brachyury and Xbp1, and has shed new light on their roles in the formation of the notochord.
    1. Cell Biology

    LRP1 integrates murine macrophage cholesterol homeostasis and inflammatory responses in atherosclerosis

    Xunde Xian, Yinyuan Ding ... Joachim Herz
    Tyrosine phosphorylation of the intracellular domain of LRP1 serves as a molecular switch to regulate cellular cholesterol homeostasis through nuclear hormone receptor-mediated regulation of the cellular cholesterol exporter ABCA1.
    1. Cell Biology

    Brain-specific Drp1 regulates postsynaptic endocytosis and dendrite formation independently of mitochondrial division

    Kie Itoh, Daisuke Murata ... Hiromi Sesaki
    Genetic and cell biological analyses reveal a new role of Drp1 in postsynaptic endocytosis during brain development beyond mitochondrial division GTPase.
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    RNA structures that resist degradation by Xrn1 produce a pathogenic Dengue virus RNA

    Erich G Chapman, Stephanie L Moon ... Jeffrey S Kieft
    The Dengue virus contains discretely folded RNA structures that confer the ability to resist a powerful host cell enzyme and produce a disease-inducing noncoding RNA.
    1. Cell Biology
    2. Stem Cells and Regenerative Medicine

    The IRE1/XBP1 signaling axis promotes skeletal muscle regeneration through a cell non-autonomous mechanism

    Anirban Roy, Meiricris Tomaz da Silva ... Ashok Kumar
    The IRE1/XBP1 signaling in myofibers is essential for robust skeletal muscle regeneration in response to injury.

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