29 results found
    1. Structural Biology and Molecular Biophysics

    The mechanism of MICU-dependent gating of the mitochondrial Ca2+uniporter

    Vivek Garg et al.
    A comprehensive functional analysis of mitochondrial Ca2+ uniporter (MCU) demonstrates that the auxiliary MICU subunits potentiate Ca2+ transport via MCU.
    1. Structural Biology and Molecular Biophysics

    Structure of Escherichia coli respiratory complex I reconstituted into lipid nanodiscs reveals an uncoupled conformation

    Piotr Kolata, Rouslan G Efremov
    The dynamic structure of respiratory complex I from mesophilic bacterium is revealed and demonstrates existence of uncoupled conformations in the bacterial complex.
    1. Cell Biology
    2. Neuroscience

    Pregnancy-associated plasma protein-aa regulates endoplasmic reticulum–mitochondria associations

    Mroj Alassaf, Mary C Halloran
    An extracellular modulator of IGF1 signaling, Pappaa, regulates endoplasmic reticulum–mitochondria connections, which are critical for metabolic homeostasis and hair cell survival.
    1. Neuroscience

    The distinct roles of calcium in rapid control of neuronal glycolysis and the tricarboxylic acid cycle

    Carlos Manlio Díaz-García et al.
    When neurons are stimulated, calcium entry into mitochondria upregulates mitochondrial energy production, but glycolytic energy production in the cytosol is stimulated by elevated energy demand, not Ca2+ signaling.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Cryo-EM structure of the calcium release-activated calcium channel Orai in an open conformation

    Xiaowei Hou et al.
    Structure of the Ca2+ channel Orai in an open conformation provides insights into the opening mechanism and the channel's role in regulating Ca2+ entry into immune and other non-excitable cells.
    1. Structural Biology and Molecular Biophysics

    Dichotomous role of the human mitochondrial Na+/Ca2+/Li+ exchanger NCLX in colorectal cancer growth and metastasis

    Trayambak Pathak et al.
    Colorectal tumors down-regulate the mitochondrial Na+/Ca2+/Li+ exchanger (NCLX) to alter mitochondrial Ca2+ signaling and initiate transcriptional and metabolic reprogramming that drives tumor chemo-resistance and metastasis.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural insights into the Ca2+-dependent gating of the human mitochondrial calcium uniporter

    Yan Wang et al.
    Cryo-EM structures of human MCU-EMRE-MICU1-MICU2 complex in the apo and Ca2+-bound states reveal how MICU1 and MICU2 impart their gating function to the mitochondrial calcium uniporter.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structures reveal gatekeeping of the mitochondrial Ca2+ uniporter by MICU1-MICU2

    Chongyuan Wang et al.
    Cryo-EM structures reveal that MICU1-MICU2 operates like a regulatable toxin to block the pore of the mitochondrial calcium uniporter and confer Ca2+-dependent control.
    1. Biochemistry and Chemical Biology

    Skd3 (human ClpB) is a potent mitochondrial protein disaggregase that is inactivated by 3-methylglutaconic aciduria-linked mutations

    Ryan R Cupo, James Shorter
    Skd3 (human ClpB) is a potent ATP-dependent mitochondrial protein disaggregase that is activated by the rhomboid protease, PARL, and inactivated by MGCA7-linked mutations.
    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.

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