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

    Intracellular cholesterol trafficking is dependent upon NPC2 interaction with lysobisphosphatidic acid

    Leslie A McCauliff et al.
    Sterol kinetics and cell-based assays reveal a heretofore unknown step in cholesterol trafficking through the endolysosomal compartment, involving a direct functional interaction between NPC2 and lysosbisphosphatidic acid.
    1. Cancer Biology

    Tsc2 disruption in mesenchymal progenitors results in tumors with vascular anomalies overexpressing Lgals3

    Peter J Klover et al.
    Tsc2 inactivation in mouse mesenchymal progenitors produced tumors with vascular anomalies reminiscent of human angiomyolipomas, and a gene expression signature in Tsc2-deficient tissues which included Lgals3, as a novel potential biomarker for TSC1/2 loss.
    1. Structural Biology and Molecular Biophysics

    Structural mechanisms of phospholipid activation of the human TPC2 channel

    Ji She et al.
    Cryo-EM structures of human TPC2 channel in the ligand-bound and apo states reveal the structural mechanism of PI(3,5)P2 lipid regulated gating of TPC2.
    1. Biochemistry and Chemical Biology

    Agonist-mediated switching of ion selectivity in TPC2 differentially promotes lysosomal function

    Susanne Gerndt et al.
    The lysosomal ion channel TPC2 emerges as an example of an ion channel in which ion selectivity is not fixed but rather agonist-selective.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Molecular mechanism of Aurora A kinase autophosphorylation and its allosteric activation by TPX2

    Adelajda Zorba et al.
    Aurora A kinase, an anti-cancer drug target, can be activated by two independent mechanisms.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural insight into TPX2-stimulated microtubule assembly

    Rui Zhang et al.
    A combination of cryo-electron microscopy of TPX2 bound to microtubules and in vitro reconstitution experiments reveals a novel microtubule interaction mode that explains how TPX2 promotes microtubule nucleation and stabilization.
    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. Cell Biology
    2. Physics of Living Systems

    Spatiotemporal organization of branched microtubule networks

    Akanksha Thawani et al.
    A sequential reaction pathway involving TPX2, augmin and γ-TuRC governs the assembly and architecture of branched microtubule networks.
    1. Cell Biology

    Control of TSC2-Rheb signaling axis by arginine regulates mTORC1 activity

    Bernadette Carroll et al.
    Signaling pathway mTOR can sense its principal activator amino acid arginine via a different mechanism than that previously described for other amino acids.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Lysosomal membrane glycoproteins bind cholesterol and contribute to lysosomal cholesterol export

    Jian Li, Suzanne R Pfeffer
    LAMP proteins, the major glycoproteins of the lysosome membrane, bind cholesterol directly and specifically, and interact with NPC1 and NPC2 proteins as part of the lysosomal cholesterol export process.

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