8,622 results found
    1. Ecology
    2. Evolutionary Biology

    The Natural History of Model Organisms: The Norway rat, from an obnoxious pest to a laboratory pet

    Klaudia Modlinska, Wojciech Pisula
    The rat is much more than a simple model, and a better appreciation of the natural history of wild rats would increase its value as a research organism.
    1. Neuroscience

    Kv1.1 contributes to a rapid homeostatic plasticity of intrinsic excitability in CA1 pyramidal neurons in vivo

    Peter James Morgan et al.
    Short, theta-bursts of action potential firing decrease the global excitability of CA1 pyramidal neurons, providing an internal mechanism which could regulate their allocation to memory engrams.
    1. Neuroscience

    Arcuate nucleus and lateral hypothalamic CART neurons in the mouse brain exert opposing effects on energy expenditure

    Aitak Farzi et al.
    CART exerts differential metabolic effects in response to activation of neurons of the Arc, where CART suppresses energy expenditure, while it enforces the reward characteristics of the LHA.
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    A unifying mechanism for the biogenesis of membrane proteins co-operatively integrated by the Sec and Tat pathways

    Fiona J Tooke et al.
    Bioinformatics and experimental approaches identify families of membrane proteins requiring the co-ordinated action of the Sec pathway and Tat pathways for their integration and define features of the polypeptides that mediate interaction with these pathways.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    9Å structure of the COPI coat reveals that the Arf1 GTPase occupies two contrasting molecular environments

    Svetlana O Dodonova et al.
    A molecular model of the assembled COPI coat, determined by cryo-electron tomography of an in vitro reconstituted budding reaction, reveals details of interactions mediating coat assembly and shows the binding site of ArfGAP2.
    1. Neuroscience

    Dendritic sodium spikes are required for long-term potentiation at distal synapses on hippocampal pyramidal neurons

    Yujin Kim et al.
    At distal synapses onto hippocampal CA1 pyramidal neurons, synaptic plasticity is dependent on dendritically initiated sodium spikes, thus establishing a new role for voltage-gated sodium channels in the dendrites that may have important implications for how learning rules are implemented.
    1. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    AFF4 binding to Tat-P-TEFb indirectly stimulates TAR recognition of super elongation complexes at the HIV promoter

    Ursula Schulze-Gahmen et al.
    AFF4 increases the combined selectivity of HIV Tat and TAR for super elongation complexes 330-fold over P-TEFb alone.
    1. Structural Biology and Molecular Biophysics

    Structural model for differential cap maturation at growing microtubule ends

    Juan Estévez-Gallego et al.
    The tubulin GTPase cycle structurally modulates the microtubule cap, causing lattice expansion, which is an intermediate state involved in phosphate release and regulatory signaling.
    1. Ecology
    2. Epidemiology and Global Health

    Accelerated viral dynamics in bat cell lines, with implications for zoonotic emergence

    Cara E Brook et al.
    Bats' uniquely robust innate antiviral immune defenses select for faster transmitting viruses likely to generate extreme virulence upon spillover to secondary hosts with immune systems divergent from those of bat.
    1. Biochemistry and Chemical Biology

    In vivo experiments do not support the charge zipper model for Tat translocase assembly

    Felicity Alcock et al.
    A prominent model for the structural organisation of the Tat (twin-arginine translocase) protein transport system fails live cell tests.

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