343 results found
    1. Cell Biology
    2. Developmental Biology

    Genetic screen in Drosophila muscle identifies autophagy-mediated T-tubule remodeling and a Rab2 role in autophagy

    Naonobu Fujita et al.
    Analyses of a developmentally regulated Drosophila myofiber remodeling program provide insight into induced autophagy required for T-tubule membrane reorganization, and uncover a conserved Rab2 role in autophagosome-lysosome fusion.
    1. Cell Biology
    2. Neuroscience

    Synaptotagmin 1 directs repetitive release by coupling vesicle exocytosis to the Rab3 cycle

    Yunsheng Cheng et al.
    Experiments in C. elegans reveal how synaptotagmin and Rab3, the 'yin and yang' of synapses, control whether transmitter vesicles remain docked at the presynaptic membrane or release their contents into the synapse.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Site-specific monoubiquitination downregulates Rab5 by disrupting effector binding and guanine nucleotide conversion

    Donghyuk Shin et al.
    With monoubiquitination sites of Rab5 identified and structural and biochemical studies using chemically synthesized ubiquitinated Rab5, Rab5 monoubiquitination is found to downregulate the function of Rab5 in a site-dependent manner.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    bMERB domains are bivalent Rab8 family effectors evolved by gene duplication

    Amrita Rai et al.
    A human three-helix Rab-binding domain can potentially bind to two Rab proteins simultaneously with different affinities at binding sites generated by gene duplication.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Diversity and plasticity in Rab GTPase nucleotide release mechanism has consequences for Rab activation and inactivation

    Lars Langemeyer et al.
    Analysis of multiple guanine exchange factors shows that Rab activation can occur via a number of mechanistically distinct GDP-release pathways.
    1. Cell Biology

    Endosomal Rab cycles regulate Parkin-mediated mitophagy

    Koji Yamano et al.
    Parkin ubiquitination of damaged mitochondria recruits the Rab GEF, RABGEF1, to regulate downstream Rab cycles and ATG9A recruitment to growing phagophores that are participating in mitophagy.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Phosphoproteomics reveals that Parkinson's disease kinase LRRK2 regulates a subset of Rab GTPases

    Martin Steger et al.
    Discovery of a physiological LRRK2 substrate and a new mechanism of Rab regulation should aid Parkinson’s research and the understanding of Rab function.
    1. Cell Biology

    Mitochondrial Rab GAPs govern autophagosome biogenesis during mitophagy

    Koji Yamano et al.
    Two GAP proteins bound to mitochondria regulate the enyzme Rab7, and thereby the expansion of the isolation membrane during mitophagy, downstream of PINK1 and Parkin, two proteins that are mutated in familial Parkinson's disease.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    A conserved and regulated mechanism drives endosomal Rab transition

    Lars Langemeyer et al.
    Reconstitution of the endosomal Rab cascade reveals that Rab5 binds and activates the Mon1-Ccz1 guanine nucleotide exchange factor, which in turn recruits Rab7 to membranes to drive fusion.
    1. Biochemistry and Chemical Biology

    PPM1H phosphatase counteracts LRRK2 signaling by selectively dephosphorylating Rab proteins

    Kerryn Berndsen et al.
    PPM1H protein phosphatase dephosphorylates Rab proteins modulating LRRK2 signalling.

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