510 results found
    1. Cell Biology
    2. Microbiology and Infectious Disease

    The Lon protease temporally restricts polar cell differentiation events during the Caulobacter cell cycle

    Deike J Omnus et al.
    A proteomics-based approach identifies novel substrate proteins of the Lon protease in Caulobacter crescentus and reveals a critical role of Lon in regulating flagella assembly and stalk biogenesis during the cell cycle.
    1. Structural Biology and Molecular Biophysics

    Transcription initiation at a consensus bacterial promoter proceeds via a ‘bind-unwind-load-and-lock’ mechanism

    Abhishek Mazumder et al.
    Single-molecule fluorescence experiments reveal transcription initiation proceeds via a 'bind-unwind-load-and-lock' mechanism where promoter DNA unwinds outside the RNA polymerase (RNAP) cleft, the unwound template-DNA loads into the cleft, and RNAP 'locks' the template-DNA by closing the RNAP clamp module.
    1. Neuroscience

    Experience-dependent weakening of callosal synaptic connections in the absence of postsynaptic FMRP

    Zhe Zhang et al.
    Postnatal, postsynaptic loss of FMRP specifically weakens callosal synaptic inputs onto L2/3 pyramidal neurons, in requirement ofnormal sensory experience, through downregulating AMPA receptor transmission and without affecting local synaptic inputs during cortical circuit development.
    1. Cell Biology
    2. Neuroscience

    TRPM7 is critical for short-term synaptic depression by regulating synaptic vesicle endocytosis

    Zhong-Jiao Jiang et al.
    Electrophysiological and live-cell imaging analyses identify a presynaptic function of Ca2+ influx via transient receptor potential melastatin 7 (TRPM7) channels.
    1. Neuroscience

    Memory recall involves a transient break in excitatory-inhibitory balance

    Renée S Koolschijn et al.
    Hippocampal activity during memory recall predicts a transient increase in the ratio between neocortical glutamate and GABA, thereby allowing otherwise dormant memories to be released.
    1. Neuroscience

    Calcium dependence of neurotransmitter release at a high fidelity synapse

    Abdelmoneim Eshra et al.
    The Ca2+-dependence of vesicle priming, fusion, and replenishment at cerebellar mossy fiber boutons show a prominent Ca2+-dependent priming step, a shallow non-saturating dose-response curve up to 50 µM, and little Ca2+-dependence of sustained vesicle replenishment.
    1. Microbiology and Infectious Disease
    2. Structural Biology and Molecular Biophysics

    Structural characterization of NrnC identifies unifying features of dinucleotidases

    Justin D Lormand et al.
    Dinucleotidases, specialized enzymes that catalyze the final step in RNA degradation, have evolved independently and repeatedly to fulfill essential roles in cell growth.
    1. Neuroscience

    Spectral signature and behavioral consequence of spontaneous shifts of pupil-linked arousal in human

    Ella Podvalny et al.
    Fluctuations of spectral power in large-scale cortical networks shape behavior in a perceptual decision-making task through arousal-linked and arousal-independent mechanisms.
    1. Neuroscience

    A reduction in voluntary physical activity in early pregnancy in mice is mediated by prolactin

    Sharon R Ladyman et al.
    Despite voluntary exercise being rewarding to mice, pregnancy hormones act in the maternal brain to markedly reduce the time females choose to engage in this activity.
    1. Neuroscience

    Hippocampal replay of experience at real-world speeds

    Eric L Denovellis et al.
    A new state space decoder revealed that most hippocampal sharp-wave ripples contain coherent spatial content, and that this 'replay' typically progresses at speeds similar to those seen during actual experiences.

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