1,021 results found
    1. Computational and Systems Biology
    2. Microbiology and Infectious Disease

    The cyanobacterial circadian clock follows midday in vivo and in vitro

    Eugene Leypunskiy et al.
    The cyanobacterial core clock tracks midday regardless of day length, which can be understood in terms of a model for how the environment alters the clock limit cycle.
    1. Computational and Systems Biology
    2. Physics of Living Systems

    Biophysical clocks face a trade-off between internal and external noise resistance

    Weerapat Pittayakanchit et al.
    Molecular clocks that are robust to external fluctuations are vulnerable to internal fluctuations and vice versa.
    1. Physics of Living Systems

    Confinement discerns swarmers from planktonic bacteria

    Weijie Chen et al.
    For the same bacterial strain, the swarming phenotype can be biophysically discerned from swimming phenotype based on the motion pattern under circular confinement on a soft agar.
    1. Computational and Systems Biology
    2. Chromosomes and Gene Expression

    Natural changes in light interact with circadian regulation at promoters to control gene expression in cyanobacteria

    Joseph Robert Piechura et al.
    Cyanobacteria cope with both predictable day/night changes and natural fluctuations in light during the day by adjusting the expression dynamics of circadian-clock-controlled genes via a network of transcriptional regulators.
    1. Physics of Living Systems

    Robust, coherent, and synchronized circadian clock-controlled oscillations along Anabaena filaments

    Rinat Arbel-Goren et al.
    Noisy circadian clocks in Anabaena, coupled by cell-cell communication, display high spatio-temporal coherence and can be robustly described by incorporating demographic noise in a theoretical model of coupled clock arrays.
    1. Microbiology and Infectious Disease
    2. Physics of Living Systems

    Protein gradients on the nucleoid position the carbon-fixing organelles of cyanobacteria

    Joshua S MacCready et al.
    Carboxysomes, the carbon-fixation machinery of cyanobacteria, are equidistantly-positioned by dynamic gradients of the protein McdA on the nucleoid that emerge through interaction with a previously unidentified carboxysome factor, McdB.
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    Switching of metabolic programs in response to light availability is an essential function of the cyanobacterial circadian output pathway

    Anna M Puszynska, Erin K O'Shea
    The circadian clock of Synechococcus elongatus PCC7942 schedules the activity of the transcription factor RpaA, which controls key events in carbon metabolism that contribute to cell fitness in conditions mimicking the natural environment.
    1. Cell Biology
    2. Developmental Biology

    Alstrom syndrome gene is a stem-cell-specific regulator of centriole duplication in the Drosophila testis

    Cuie Chen, Yukiko M Yamashita
    Alms1a is a centrosomal protein that exhibits asymmetric localization between mother and daughter centrosomes in asymmetrically dividing stem cells in Drosophila testis, controlling centriole duplication.
    1. Chromosomes and Gene Expression

    The Ku subunit of telomerase binds Sir4 to recruit telomerase to lengthen telomeres in S. cerevisiae

    Evan P Hass, David C Zappulla
    In yeast, the secondary pathway for recruiting telomerase to chromosome ends requires a component of telomeric transcriptionally silent chromatin.
    1. Cell Biology
    2. Physics of Living Systems

    Stoichiometric interactions explain spindle dynamics and scaling across 100 million years of nematode evolution

    Reza Farhadifar et al.
    Stoichiometric interactions between microtubules and cortical force-generators set spindle size, position and dynamics, and its scaling with cell size in nematode species.

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