69 results found
    1. Neuroscience

    The CNS connectome of a tadpole larva of Ciona intestinalis (L.) highlights sidedness in the brain of a chordate sibling

    Kerrianne Ryan et al.
    Serial-section EM analysis uncovers the CNS connectome of a Ciona larva, the second of any entire nervous system, and exposes left-right asymmetries in its synaptic circuits.
    1. Cell Biology
    2. Evolutionary Biology

    The regulation of oocyte maturation and ovulation in the closest sister group of vertebrates

    Shin Matsubara et al.
    Oocyte maturation and ovulation in the sister group of vertebrates, Ciona intestinalis Type A, are triggered by Ci-VP, the Ciona homolog of a typical neruopeptide, vasopressin.
    1. Developmental Biology
    Ciona intestinalis illustration

    The Natural History of Model Organisms: An organismal perspective on C. intestinalis development, origins and diversification

    Matthew J Kourakis, William C Smith
    The life cycle and morphology of the sea squirt Ciona intestinalis shed light on vertebrate evolution.
    1. Developmental Biology
    2. Genetics and Genomics

    Combinatorial chromatin dynamics foster accurate cardiopharyngeal fate choices

    Claudia Racioppi et al.
    ATAC-seq, CRISPR/Cas9 mutagenesis, reporter and gene expression assays revealed dynamic chromatin accessibility profiles governing differential gene expression during heart vs. pharyngeal muscle fate choices in the powerful chordate model Ciona.
    1. Developmental Biology
    2. Evolutionary Biology

    Conservation of peripheral nervous system formation mechanisms in divergent ascidian embryos

    Joshua F Coulcher et al.
    Developmental regulatory mechanisms for peripheral nervous system formation appear to be conserved in ascidians despite extensive genomic divergence after 390 MY of separate evolution.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Assembly and positioning of actomyosin rings by contractility and planar cell polarity

    Ivonne M Sehring et al.
    Contractility wins over the polarity pathway in a tug-of-war to position a cytokinesis-like actomyosin ring at the equator of notochord cells.
    1. Evolutionary Biology
    2. Neuroscience

    Metazoan evolution of glutamate receptors reveals unreported phylogenetic groups and divergent lineage-specific events

    David Ramos-Vicente et al.
    The animal phylogeny of glutamate receptors indicates that vertebrate types do not account for all receptor classes originated during evolution, neither are they the pinnacle of a linear evolutive process.
    1. Structural Biology and Molecular Biophysics

    The hydrophobic nature of a novel membrane interface regulates the enzyme activity of a voltage-sensing phosphatase

    Akira Kawanabe et al.
    Electrophysiological and fluorometric studies of Ci-VSP expressed in Xenopus oocyte revealed two states of the enzyme region with distinct enzyme activity and distinct coupling to the voltage sensor.
    1. Developmental Biology

    The invariant cleavage pattern displayed by ascidian embryos depends on spindle positioning along the cell's longest axis in the apical plane and relies on asynchronous cell divisions

    Rémi Dumollard et al.
    Cell cycle asynchrony regulates apical cell shape to drive cell division orientation in the apical plane.
    1. Developmental Biology
    2. Evolutionary Biology

    Divergent mechanisms regulate conserved cardiopharyngeal development and gene expression in distantly related ascidians

    Alberto Stolfi et al.
    Embryos of distantly related sea squirt species are nearly identical but develop according to different gene regulatory mechanisms.

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