32 results found
    1. Cancer Biology
    2. Cell Biology

    GPCR signaling inhibits mTORC1 via PKA phosphorylation of Raptor

    Jenna L Jewell et al.
    Protein kinase A (PKA) phosphorylates Raptor and inhibits mammalian target of rapamycin complex 1 (mTORC1) activity.
    1. Cell Biology
    2. Neuroscience

    Multiple factors maintain assembled trans-SNARE complexes in the presence of NSF and αSNAP

    Eric A Prinslow et al.
    Biophysical analyses indicate that Munc18-1, Munc13-1, synaptotagmin-1 and complexin-1 maintain assembled trans-SNARE complexes in the presence of NSF-alphaSNAP, suggesting that they form part of the primed state of synaptic vesicles.
    1. Cell Biology
    2. Structural Biology and Molecular Biophysics

    Munc18-1 catalyzes neuronal SNARE assembly by templating SNARE association

    Junyi Jiao et al.
    Sec1/Munc18-family proteins chaperone SNARE assembly via a common templating mechanism.
    1. Neuroscience

    Molecular mechanisms that stabilize short term synaptic plasticity during presynaptic homeostatic plasticity

    Jennifer M Ortega et al.
    Genetic and electrophysiological experiments define how homeostatic signaling stabilizes both the gain and short-term dynamic properties of neurotransmitter release, ensuring that synaptic information transfer remains robust to external perturbation.
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    Structural principles of SNARE complex recognition by the AAA+ protein NSF

    K Ian White et al.
    Electron-cryomicroscopy structures of the supercomplex of NSF, αSNAP, and neuronal SNAREs in the presence of ATP under non-hydrolyzing conditions at 3.9 Å resolution reveal interactions between the N-terminal residues of SNAP-25 and NSF.
    1. Microbiology and Infectious Disease

    NSF-mediated disassembly of on- and off-pathway SNARE complexes and inhibition by complexin

    Ucheor B Choi et al.
    NSF is part of a membrane trafficking quality control system that disassembles both properly formed and off-pathway SNARE complexes, and the disassembly activity may be regulated by complexin.
    1. Developmental Biology
    2. Neuroscience

    Vibrator and PI4KIIIα govern neuroblast polarity by anchoring non-muscle myosin II

    Chwee Tat Koe et al.
    Vibrator and PI4KIIIα that stimulate the synthesis of PI(4)P anchor non-muscle myosin II RLC (Sqh) to the plasma membrane and conversely Sqh associates with PI(4)P and facilitates its membrane localization during asymmetric division of neuroblasts.
    1. Cell Biology

    COPI mediates recycling of an exocytic SNARE by recognition of a ubiquitin sorting signal

    Peng Xu et al.
    COPI vesicle coat protein recognizes a ubiquitin sorting signal on an exocytic v-SNARE to mediate recycling.
    1. Chromosomes and Gene Expression

    Kinetochore inactivation by expression of a repressive mRNA

    Jingxun Chen et al.
    Rather than being a protein coding unit, an mRNA molecule can serve a purely regulatory function to inhibit protein synthesis of its corresponding gene.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Sec17 (α-SNAP) and an SM-tethering complex regulate the outcome of SNARE zippering in vitro and in vivo

    Matthew L Schwartz et al.
    Sec17 is shown to have divergent effects on pre-fusion SNARE complex activity, depending on the state of SNARE zippering and HOPS, an SM-tether complex, controls the outcome of Sec17-SNARE engagement.

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