6,013 results found
    1. Computational and Systems Biology
    2. Physics of Living Systems

    Phenotypic states become increasingly sensitive to perturbations near a bifurcation in a synthetic gene network

    Kevin Axelrod, Alvaro Sanchez, Jeff Gore
    Perturbations in the extracellular environment drive transitions from a highly stable memory state to an alternative phenotype in microorganisms.
    1. Developmental Biology
    2. Stem Cells and Regenerative Medicine

    A critical role for heme synthesis and succinate in the regulation of pluripotent states transitions

    Damien Detraux, Marino Caruso ... Patricia Renard
    Accumulation of succinate during the in vitro modeling of embryonic stem cell state transition critically regulate cell fate.
    1. Cell Biology

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

    S Zachary Swartz, Hieu T Nguyen ... Arminja N Kettenbach
    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. Cell Biology

    Nucleotide binding is the critical regulator of ABCG2 conformational transitions

    Zsuzsanna Gyöngy, Gábor Mocsár ... Katalin Goda
    The conformational switch of ABCG2 from the high substrate affinity inward-facing to a low substrate affinity outward-facing state is induced by nucleotide binding and accelerated by transported substrates.
    1. Physics of Living Systems

    A first order phase transition mechanism underlies protein aggregation in mammalian cells

    Arjun Narayanan, Anatoli Meriin ... Ibrahim I Cisse
    Quantitative single molecule and super resolution imaging in mammalian cells reveal a population of precursor aggregates describable by first order phase transition theory.
    1. Structural Biology and Molecular Biophysics

    Helix breaking transition in the S4 of HCN channel is critical for hyperpolarization-dependent gating

    Marina A Kasimova, Debanjan Tewari ... Baron Chanda
    The gating polarity of a voltage-gated ion channel is primarily determined by turn propensity of residues at a critical position in the middle of the S4 voltage-sensing helix.
    1. Ecology
    2. Evolutionary Biology

    The evolution of distributed sensing and collective computation in animal populations

    Andrew M Hein, Sara Brin Rosenthal ... Iain D Couzin
    A computational model shows that natural selection can cause populations to evolve a distinctive population-level phenotype: the ability to transition between collective states in response to the environment.
    1. Structural Biology and Molecular Biophysics

    Single molecule compression reveals intra-protein forces drive cytotoxin pore formation

    Daniel M Czajkowsky, Jielin Sun ... Zhifeng Shao
    Compressive force spectroscopy of single molecules reveals that intra-protein forces underlie the long-distance coordination of structural changes within a cytotoxin during pore formation.
    1. Developmental Biology

    Stella modulates transcriptional and endogenous retrovirus programs during maternal-to-zygotic transition

    Yun Huang, Jong Kyoung Kim ... M Azim Surani
    Soon after fertilisation, a critical portion of the embryonic genome is switched on through the actions of maternally inherited Stella, in part through controlling the activation of transposable elements.
    1. Neuroscience

    Translational control of auditory imprinting and structural plasticity by eIF2α

    Gervasio Batista, Jennifer Leigh Johnson ... Jose L Pena
    Behavioral pharmacology and molecular biology reveal a translational control mechanism underlying auditory imprinting and structural plasticity that can be pharmacologically manipulated to reopen the critical period.

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