121 results found
    1. Cell Biology

    Actin filaments target the oligomeric maturation of the dynamin GTPase Drp1 to mitochondrial fission sites

    Wei-ke Ji et al.
    A key cellular process is controlled by altering a balance, rather than through an off/on mechanism.
    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. Immunology and Inflammation

    Peripheral natural killer cells in chronic hepatitis B patients display multiple molecular features of T cell exhaustion

    Marie Marotel et al.
    Similar to T cell exhaustion, natural killer cell dysfunction in chronic hepatitis B patients results from deregulated calcium pathway.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Single-color, ratiometric biosensors for detecting signaling activities in live cells

    Brian L Ross et al.
    A novel panel of homoFRET biosensors that detect kinase and second messenger activity, called FLAREs, enables multiparameter imaging of signaling activities within a single live cell with a quantitative and ratiometric readout.
    1. Cell Biology
    2. Structural Biology and Molecular Biophysics

    IP3 mediated global Ca2+ signals arise through two temporally and spatially distinct modes of Ca2+ release

    Jeffrey T Lock, Ian Parker
    Cell-wide Ca2+ signals that regulate numerous cellular functions comprise dual Ca2+ release modes through IP3 receptors, punctate transients mediated by clustered receptors and spatiotemporally diffuse release through functionally distinct receptors.
    1. Biochemistry and Chemical Biology

    Intrinsic disorder within AKAP79 fine-tunes anchored phosphatase activity toward substrates and drug sensitivity

    Patrick J Nygren et al.
    Flexibility is a defining feature of AKAP kinase-phosphatase assemblies and points toward a mechanism whereby combinatorial recruitment of binding partners tailors the overall conformation of the macromolecular assembly, allowing customized physiological roles.
    1. Neuroscience

    Activity-dependent regulation of T-type calcium channels by submembrane calcium ions

    Magali Cazade et al.
    The feedback inhibition of T-type calcium channels by intracellular calcium provides new avenues to better decipher the roles of these low-voltage-activated channels in the fine control of calcium signaling events in physiology and pathophysiology.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    A Histidine pH sensor regulates activation of the Ras-specific guanine nucleotide exchange factor RasGRP1

    Yvonne Vercoulen et al.
    The Ras activator RasGRP1 that impacts Ras signals in immune cells, leukemias, and colorectal cancer, switches to an active conformation aided by a pH-sensitive histidine residue in a central location of the RasGRP1 molecule.
    1. Developmental Biology

    The zinc-finger transcription factor Hindsight regulates ovulation competency of Drosophila follicles

    Lylah D Deady et al.
    Hindsight/RREB-1 plays a conserved role in follicle maturation and ovulation by sequential upregulation of matrix metalloproteinase and adrenergic receptor in follicle cells.
    1. Neuroscience

    Characterization of developmental and molecular factors underlying release heterogeneity at Drosophila synapses

    Yulia Akbergenova et al.
    Active zone release probability is correlated with calcium channel density and calcium influx at single release sites, with release strength increasing in an activity-dependent manner during synapse maturation.

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