348 results found
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    9Å structure of the COPI coat reveals that the Arf1 GTPase occupies two contrasting molecular environments

    Svetlana O Dodonova et al.
    A molecular model of the assembled COPI coat, determined by cryo-electron tomography of an in vitro reconstituted budding reaction, reveals details of interactions mediating coat assembly and shows the binding site of ArfGAP2.
    1. Biochemistry and Chemical Biology

    Pharmacologic ATF6 activating compounds are metabolically activated to selectively modify endoplasmic reticulum proteins

    Ryan Paxman et al.
    The small molecule, 147, is a pro-drug that preferentially activates ATF6 signaling through a mechanism involving localized metabolic activation and selective covalent modification of ER resident proteins involved in regulating ATF6 activity.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Arf1/COPI machinery acts directly on lipid droplets and enables their connection to the ER for protein targeting

    Florian Wilfling et al.
    The targeting of proteins from the endoplasmic reticulum to lipid droplets relies on surface modulation of the lipid droplet by the Arf1/COPI machinery.
    1. Developmental Biology
    2. Chromosomes and Gene Expression

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

    Daniel M Cohen et al.
    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. Biochemistry and Chemical Biology
    2. Cell Biology

    Phospholipase D activity couples plasma membrane endocytosis with retromer dependent recycling

    Rajan Thakur et al.
    Phosphatidic acid regulates recycling of endocytosed plasma membrane vesicles in polarized cells through a retromer and Arf1 dependent process.
    1. Cell Biology
    2. Chromosomes and Gene Expression

    HRI coordinates translation necessary for protein homeostasis and mitochondrial function in erythropoiesis

    Shuping Zhang et al.
    The heme and HRI-mediated eIF2aP–ATF4 integrated stress response in erythropoiesis has a major global impact, especially under the stress condition of iron deficiency.
    1. Developmental Biology

    Inhibiting the integrated stress response pathway prevents aberrant chondrocyte differentiation thereby alleviating chondrodysplasia

    Cheng Wang et al.
    Integrated stress response-induced expression of ATF4 and its transactivation of SOX9 causes aberrant chondrocyte differentiation and skeletal defects which can be alleviated by modulating initiation-factor eIF2α phosphorylation translation control.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    The Sec7 N-terminal regulatory domains facilitate membrane-proximal activation of the Arf1 GTPase

    Brian C Richardson et al.
    A new structure reveals two Arf-GEF regulatory domains form a single structural unit that stimulates Arf-GEF activity.
    1. Cell Biology

    Unfolded Protein Response: Modulating protein quality control

    Lars Plate et al.
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