89 results found
    1. Evolutionary Biology
    2. Physics of Living Systems

    Evolution of irreversible somatic differentiation

    Yuanxiao Gao et al.
    Irreversible differentiation into somatic cells is evolutionarily optimal if changing cell phenotype is costly, a few somatic cells already improve the organism's performance, and the organism is large enough.
    1. Evolutionary Biology

    Ancient role of sulfakinin/cholecystokinin-type signalling in inhibitory regulation of feeding processes revealed in an echinoderm

    Ana B Tinoco et al.
    Starfish feed by everting their stomach out of their mouth over prey and, interestingly, this unusual feeding mechanism is inhibited by substances similar to hormones that regulate feeding in humans.
    1. Developmental Biology
    2. Evolutionary Biology

    Studying evolution of the primary body axis in vivo and in vitro

    Kerim Anlas, Vikas Trivedi
    The shared capacity of stem cells to recapitulate initial body plan formation in vitro without species-specific cues, suggests the existence of alternative, evolutionarily conserved developmental trajectories.
    1. Developmental Biology
    2. Evolutionary Biology

    Identification of neural progenitor cells and their progeny reveals long distance migration in the developing octopus brain

    Astrid Deryckere et al.
    Neurogenic progenitor cells surrounding the eye placode generate neurons that migrate over long distances to the developing octopus brain.
    1. Cell Biology

    Selective dephosphorylation by PP2A-B55 directs the meiosis I-meiosis II transition in oocytes

    S Zachary Swartz et al.
    Time-course phosphoproteomics reveals that selective dephosphorylation is critical for directing the MI/MII transition and that, through its inherent phospho-threonine preference, PP2A-B55 imposes specific phosphoregulated behaviors that distinguish the two meiotic divisions.
    1. Developmental Biology
    2. Neuroscience

    Characterization of cephalic and non-cephalic sensory cell types provides insight into joint photo- and mechanoreceptor evolution

    Roger Revilla-i-Domingo et al.
    Molecular, cellular and behavioral genetic approaches in Platynereis dumerilii indicate that r-Opsins can act as ancient, light-dependent modulators of mechanosensation, and suggest that light-independent mechanosensory roles of r-Opsins evolved secondarily.
    1. Structural Biology and Molecular Biophysics

    Discovery and characterization of Hv1-type proton channels in reef-building corals

    Gisela Rangel-Yescas et al.
    Proton channels are present in reef-building corals and constitute important molecular players that should help understand calcification and the response of these organisms to ocean acidification.
    1. Evolutionary Biology

    The need for high-quality oocyte mitochondria at extreme ploidy dictates mammalian germline development

    Marco Colnaghi et al.
    Selective transfer of mitochondria in the Balbiani body ensures high-quality oocyte mitochondria at extreme ploidy, explaining many enigmatic features of female germline architecture including germ cell loss.
    1. Neuroscience

    Multiple neuronal networks coordinate Hydra mechanosensory behavior

    Krishna N Badhiwala et al.
    Despite lacking traditional ganglia or centralization, the Hydra nervous system computes sensorimotor responses via localized neuron ensembles.
    1. Evolutionary Biology

    Contingency and chance erase necessity in the experimental evolution of ancestral proteins

    Victoria Cochran Xie et al.
    Replicating experimental evolution from ancestral proteins shows that historical contingency steadily overwhelms chance and necessity as the primary cause of evolutionary variation in molecular sequences on long phylogenetic timescales.

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