86 results found
    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. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Blue light-induced LOV domain dimerization enhances the affinity of Aureochrome 1a for its target DNA sequence

    Udo Heintz, Ilme Schlichting
    Light absorption by the algal transcription factor Aureochrome 1a causes dimerization at the light-oxygen-voltage (LOV) sensing domain, which has implications for the design of synthetic photoreceptors for optogenetics.
    1. Cell Biology
    2. Plant Biology

    SnRK1-triggered switch of bZIP63 dimerization mediates the low-energy response in plants

    Andrea Mair, Lorenzo Pedrotti ... Markus Teige
    The transcription factor bZIP63 is a key regulator of the starvation response in the model plant Arabidopsis thaliana and is directly targeted by the kinase SnRK1.
    1. Computational and Systems Biology
    2. Chromosomes and Gene Expression

    Combinatorial bZIP dimers display complex DNA-binding specificity landscapes

    José A Rodríguez-Martínez, Aaron W Reinke ... Aseem Z Ansari
    Cognate site identification uncovers the impact of combinatorial dimerization in specifying new DNA binding sites for human bZIP transcription factors and comprehensive specificity landscapes predict the impact of SNPs on bZIP binding at previously unannotated regulatory loci.
    1. Plant Biology

    Phosphoprotein SAK1 is a regulator of acclimation to singlet oxygen in Chlamydomonas reinhardtii

    Setsuko Wakao, Brian L Chin ... Krishna K Niyogi
    SAK1, a novel cytoplasmic phosphoprotein, is a key intermediate component of the retrograde signaling pathway controlling nuclear gene expression during acclimation of Chlamydomonas cells to singlet oxygen stress.
    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. Developmental Biology
    2. Stem Cells and Regenerative Medicine

    Generic injuries are sufficient to induce ectopic Wnt organizers in Hydra

    Jack F Cazet, Adrienne Cho, Celina E Juliano
    Injuries activate the oral identity-specifying canonical Wnt signaling pathway in Hydra, which can trigger head regeneration in permissive tissue contexts created by the absence of pre-existing organizers.
    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. Developmental Biology
    2. Chromosomes and Gene Expression

    ATF4 licenses C/EBPβ activity in human mesenchymal stem cells primed for adipogenesis

    Daniel M Cohen, Kyoung-Jae Won ... David J Steger
    The transcription factor C/EBPβ binds to different DNA sequences depending on whether it binds to ATF4, which enables C/EBPβ to conduct diverse transcriptional programs during adipocyte differentiation by exploiting an expanded motif repertoire.
    1. Chromosomes and Gene Expression
    2. Genetics and Genomics

    Cis-regulatory basis of sister cell type divergence in the vertebrate retina

    Daniel P Murphy, Andrew EO Hughes ... Joseph C Corbo
    While photoreceptor and bipolar cells exhibit very similar cis-regulatory grammars, subtle differences in homeodomain motif enrichment represent a key distinction driving the divergence in their transcriptomes.

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