46 results found
    1. Cell Biology
    2. Immunology and Inflammation

    Intermittent Ca2+ signals mediated by Orai1 regulate basal T cell motility

    Tobias X Dong et al.
    Orai1 channels activate intermittently in motile T cells, generating calcium transients, detected by a novel genetically encoded indicator and inducing pauses that favor antigen scanning.
    1. Immunology and Inflammation

    Na+ influx via Orai1 inhibits intracellular ATP-induced mTORC2 signaling to disrupt CD4 T cell gene expression and differentiation

    Yong Miao et al.
    Non-specific sodium entry inhibits T cell receptor induced gene expression and differentiation of T cells by depleting intracellular ATP and disrupting mTORC2 dependent signalling axis.
    1. Cell Biology
    2. Neuroscience

    Transverse tubule remodeling enhances Orai1-dependent Ca2+ entry in skeletal muscle

    Antonio Michelucci et al.
    Structural and functional analyses show that transverse tubule association with stacks of sarcoplasmic reticulum enhances Orai1-dependent Ca2+ entry to replenish Ca2+ stores, maintain Ca2+ release, and maximize force during exercise.
    1. Structural Biology and Molecular Biophysics

    A sulfur-aromatic gate latch is essential for opening of the Orai1 channel pore

    Priscilla S-W Yeung et al.
    Electrophysiological and molecular modeling studies identify a sulfur-aromatic interaction between the hydrophobic channel gate and a nearby methionine residue, termed the "gate latch", which is essential for Orai1 pore opening.
    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. Cell Biology

    An essential and NSF independent role for α-SNAP in store-operated calcium entry

    Yong Miao et al.
    α-SNAP mediated rearrangement of Stim1 and Orai1 molecules within CRAC channel clusters is required for store-operated calcium entry.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structures reveal opening of the store-operated calcium channel Orai

    Xiaowei Hou et al.
    The structure of the calcium channel Orai in an open conformation reveals a dilated pore and gives insight into mechanisms of ion permeation and calcium selectivity.
    1. Neuroscience

    Rai1 frees mice from the repression of active wake behaviors by light

    Shanaz Diessler et al.
    Halving dosage of the Smith-Magenis syndrome responsible gene Rai1 in the mouse greatly amplifies the direct, suppressing effects of light on active-wake behavior through increased activation of the ventral-subparaventricular zone.
    1. Cell Biology

    Defective STIM-mediated store operated Ca2+ entry in hepatocytes leads to metabolic dysfunction in obesity

    Ana Paula Arruda et al.
    Store operated calcium entry is defective in hepatocytes of obese mice, and restoring this process is sufficient to improve glucose metabolism.
    1. Cell Biology
    2. Immunology and Inflammation

    Calcium influx through CRAC channels controls actin organization and dynamics at the immune synapse

    Catherine A Hartzell et al.
    By restricting actin polymerization to the perimeter of the immune synapse and promoting depolymerization, calcium influx drives centripetal actin flow, which confines CRAC channels and the endoplasmic reticulum to the synapse center.

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