927 results found
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Sterol homeostasis requires regulated degradation of squalene monooxygenase by the ubiquitin ligase Doa10/Teb4

    Ombretta Foresti et al.
    Parallel branches of the ERAD pathway regulate sterol synthesis at multiple steps via feedback inhibition.
    1. Cell Biology

    A new family of StART domain proteins at membrane contact sites has a role in ER-PM sterol transport

    Alberto T Gatta et al.
    A new family of sterol-specific lipid transfer proteins has been found that anchors in the endoplasmic reticulum; some of these proteins stretch across membrane contacts and mediate sterol traffic from the plasma membrane.
    1. Cell Biology

    The sterol-responsive RNF145 E3 ubiquitin ligase mediates the degradation of HMG-CoA reductase together with gp78 and Hrd1

    Sam A Menzies et al.
    CRISPR/Cas9 genome-wide screens using sterol-sensitive endogenous HMG-CoA reductase (HMGCR) reporter identify the sterol-responsive RNF145 and gp78 as independently responsible for sterol-accelerated degradation of HMGCR, the rate-limiting enzyme of cholesterol biosynthesis.
    1. Neuroscience

    Steroid hormone induction of temporal gene expression in Drosophila brain neuroblasts generates neuronal and glial diversity

    Mubarak Hussain Syed et al.
    A steroid hormone acts directly on brain neural progenitors to coordinately alter gene expression and specify neuronal and glial cell types.
    1. Developmental Biology
    2. Neuroscience

    Mitochondrial fusion but not fission regulates larval growth and synaptic development through steroid hormone production

    Hector Sandoval et al.
    The dual role of Drosophila Mitofusin in steroid hormone production and cholesterol ester storage, which is evolutionary conserved by the combined expression of the two mammalian Mitofusins, ensures proper synaptic development.
    1. Cell Biology
    2. Evolutionary Biology

    Sterol transfer by atypical cholesterol-binding NPC2 proteins in coral-algal symbiosis

    Elizabeth Ann Hambleton et al.
    Diversification of a conserved cholesterol binder drives functional replacement of cholesterol with symbiont-produced sterols in corals living in nutrient-poor environments.
    1. Plant Biology

    Structural basis for plant plasma membrane protein dynamics and organization into functional nanodomains

    Julien Gronnier et al.
    Unprecedented resolution of the molecular mechanisms of plant membrane protein anchoring involving phospholipids and sterols reveals the control of spatio-temporal segregation into plasma membrane nanodomains.
    1. Cell Biology

    Niemann-Pick type C proteins promote microautophagy by expanding raft-like membrane domains in the yeast vacuole

    Takuma Tsuji et al.
    Sterol transport by Niemann-Pick type C proteins induces the expansion of raft-like domains in the yeast vacuole, enabling engulfment of lipid droplets by microautophagy.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Identification of NPC1 as the target of U18666A, an inhibitor of lysosomal cholesterol export and Ebola infection

    Feiran Lu et al.
    A nanomolar inhibitor of cholesterol transport out of endosomes/lysosomes can be crosslinked to the “sterol-sensing domain” of NPC1, which implicates this domain in the transmembrane transport of cholesterol.
    1. Human Biology and Medicine

    Expression of SREBP-1c Requires SREBP-2-mediated Generation of a Sterol Ligand for LXR in Livers of Mice

    Shunxing Rong et al.
    SREBP-2 directly regulates genes involved in cholesterol homeostasis and indirectly regulates fatty acid synthesis through the production of a ligand responsible for the activation of LXR and SREBP-1c.

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