108 results found
    1. Cell Biology
    2. Neuroscience

    Cell-type-specific regulation of neuronal intrinsic excitability by macroautophagy

    Ori J Lieberman et al.
    In addition to its classic role in synaptic function and plasticity, macroautophagy regulates neuronal intrinsic excitability via degradation of acetylated Kir2 channels to control neurotransmission.
    1. Biochemistry and Chemical Biology

    Exchange of water for sterol underlies sterol egress from a StARkin domain

    George Khelashvili et al.
    The capture and export of a hydrophobic sterol molecule from the binding pocket of a Lam/GramD1 sterol-binding protein is unexpectedly mediated by water.
    1. Cell Biology
    2. Human Biology and Medicine

    Impaired lysosomal acidification triggers iron deficiency and inflammation in vivo

    King Faisal Yambire et al.
    Impaired lysosomal acidification results in retention of iron inside lysosomes, triggering functional iron deficiency, dysfunctional mitochondria (especially mtDNA loss), and inflammation in vivo in a mouse model of lysosomal disease.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Movement of accessible plasma membrane cholesterol by the GRAMD1 lipid transfer protein complex

    Tomoki Naito et al.
    GRAMD1 proteins sense a transient expansion of the accessible pool of plasma membrane cholesterol and facilitate its transport to the endoplasmic reticulum at ER-PM contact sites.
    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. Human Biology and Medicine

    Obesity-linked suppression of membrane-bound O-acyltransferase 7 (MBOAT7) drives non-alcoholic fatty liver disease

    Robert N Helsley et al.
    Loss of function of membrane-bound O-acyltransferase 7 (MBOAT7), but not transmembrane channel-like 4 (TMC4), promotes hepatic steatosis.
    1. Cell Biology
    2. Developmental Biology

    Cholesterol accessibility at the ciliary membrane controls hedgehog signaling

    Maia Kinnebrew et al.
    The patched hedgehog receptor inhibits the transmembrane transducer smoothened by reducing the accessibility of cholesterol locally at the membrane of the primary cilium.
    1. Cell Biology
    2. Genetics and Genomics

    NHR-14 loss of function couples intestinal iron uptake with innate immunity in C. elegans through PQM-1 signaling

    Malini Rajan et al.
    Nuclear receptor NHR-14 regulates the subcellular localization of the zinc transcription factor PQM-1 to coordinate innate immunity with iron sequestration during pathogen infection in C. elegans..
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Mitochondria supply ATP to the ER through a mechanism antagonized by cytosolic Ca2+

    Jing Yong et al.
    ATP enters the endoplasmic reticulum (ER) lumen through an SLC35B1/AXER-dependentCaATiER mechanism, and ATP usage in the ER renders 'anti-Warburg' effect by increasing ATP regeneration from OxPhos while decreasing glycolysis.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Release of cholesterol-rich particles from the macrophage plasma membrane during movement of filopodia and lamellipodia

    Xuchen Hu et al.
    Macrophages release 30-nm vesicular particles enriched in accessible cholesterol during cellular locomotion, a discovery that is likely relevant to cholesterol disposal by these cells.

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