2,323 results found
    1. Neuroscience

    Rap2 and TNIK control Plexin-dependent tiled synaptic innervation in C. elegans

    Xi Chen et al.
    Plexin controls the spatial distribution of synapses by locally inhibiting Rap2 small GTPase activity along the axon, and a Rap2 effector, TNIK, which also plays a key role in inhibiting synapse number.
    1. Immunology and Inflammation
    2. Neuroscience

    Peripherally administered orexin improves survival of mice with endotoxin shock

    Yasuhiro Ogawa et al.
    When the neuropeptide orexin is peripherally administered in mice with septic shock, it penetrates the blood-brain barrier and acts in the brain to improve survival through multiple autonomic and neuroendocrine pathways.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    A Meier-Gorlin syndrome mutation in a conserved C-terminal helix of Orc6 impedes origin recognition complex formation

    Franziska Bleichert et al.
    Electron microscopy uncovers the structure of the origin recognition complex (ORC) in metazoans, and reveals how mutations in the ORC6 subunit lead to Meier-Gorlin syndrome in humans.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural basis for activation and non-canonical catalysis of the Rap GTPase activating protein domain of plexin

    Yuxiao Wang et al.
    The crystal structures of the intracellular part of the plexin receptor in the active dimer form, and its complex with a key downstream signalling protein Rap, provide insights into how plexin initiates a signalling cascade involved in axon guidance.
    1. Structural Biology and Molecular Biophysics
    2. Microbiology and Infectious Disease

    Structural basis for the hijacking of endosomal sorting nexin proteins by Chlamydia trachomatis

    Blessy Paul et al.
    Chlamydia hijacks membrane trafficking proteins of the human host via the cytoplasmic domain of a secreted transmembrane protein.
    1. Cell Biology

    DNA Replication: Rethinking origin licensing

    Stephen P Bell
    Human cells that lack a subunit in their origin recognition complex are viable, which suggests the existence of alternative mechanisms to initiate DNA replication.
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    1. Neuroscience

    Stepwise wiring of the Drosophila olfactory map requires specific Plexin B levels

    Jiefu Li et al.
    PlexB plays a multifaceted role in instructing the assembly of the Drosophila olfactory circuit through temporally-regulated expression patterns and expression level-dependent effects.
    1. Chromosomes and Gene Expression
    2. Computational and Systems Biology

    The eukaryotic bell-shaped temporal rate of DNA replication origin firing emanates from a balance between origin activation and passivation

    Jean-Michel Arbona et al.
    The universal eukaryotic DNA replication kinetics is the consequence of simple physicochemical rules resulting from the localisation of potential replication origins at discrete sites and the diffusion of limiting origin firing factors in the nuclear space.
    1. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    Structure of the active form of human origin recognition complex and its ATPase motor module

    Ante Tocilj et al.
    The human Origin Replication Complex is shaped as a shallow corkscrew in a classic AAA+ organization reminiscent of clamp loader complexes with highly controlled ATPase activity as exemplified by Meier-Gorlin syndrome mutations.
    1. Neuroscience

    Hippocampus ghrelin signaling mediates appetite through lateral hypothalamic orexin pathways

    Ted M Hsu et al.
    A communication pathway linking memory processing and feeding behavior exists between the gut hormone ghrelin, the hippocampus and the hypothalamic neuropeptide orexin.

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