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272 results found
    1. Cancer Biology
    2. Cell Biology

    AMP-activated protein kinase fortifies epithelial tight junctions during energetic stress via its effector GIV/Girdin

    Nicolas Aznar et al.
    An effector of AMPK is essential for the kinase and its pharmacological activators, including Metformin, to strengthen cell-cell junctions and preserve epithelial cell polarity and barrier functions in the face of energetic stress, as well as to suppress oncogenesis.
    1. Structural Biology and Molecular Biophysics

    Structural basis for SARM1 inhibition and activation under energetic stress

    Michael Sporny et al.
    Cryo-EM shows that the NADase activity of SARM1 is allosterically inhibited by physiological concentrations of NAD+ that stabilizes an auto-inhibited conformation of SARM1, explaining how NAD+ depletion may inflict neurodegeneration.
    1. Physics of Living Systems

    Shape selection and mis-assembly in viral capsid formation by elastic frustration

    Carlos I Mendoza, David Reguera
    Nucleation, elasticity theory, and simulations were combined to construct a general phase diagram that elucidates the conditions for successful viral assembly and the key factors to prevent it.
    1. Ecology
    2. Evolutionary Biology

    Tooth fracture frequency in gray wolves reflects prey availability

    Blaire Van Valkenburgh et al.
    Despite risks of infection and reduced fitness, tooth fracture frequency in gray wolves increases rapidly when prey are scarce because they must consume carcasses more completely.
    1. Structural Biology and Molecular Biophysics
    2. Computational and Systems Biology

    Pi-Pi contacts are an overlooked protein feature relevant to phase separation

    Robert McCoy Vernon et al.
    Statistics on the frequencies of pi interactions in folded protein structures enable successful prediction of intrinsically disordered protein phase separation, with clear implications for a physical understanding of cellular organization.
    1. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    The mechanism of variability in transcription start site selection

    Libing Yu et al.
    Variability in bacterial transcription start site selection involves DNA “scrunching” and “anti-scrunching,” which may represent a general mechanism for start site selection in all organisms.
    1. Ecology

    Cyclic bouts of extreme bradycardia counteract the high metabolism of frugivorous bats

    M Teague O'Mara et al.
    Novel heart rate strategies that minimize energy expenditure during the day are necessary to cope with high energy nocturnal lifestyles of tent-making bats.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Akt regulation of glycolysis mediates bioenergetic stability in epithelial cells

    Yin P Hung et al.
    Individual cells display heterogeneous fluctuations in metabolic activity, with amplitude and kinetics controlled by interlocking feedbacks between glycolysis and the Insulin/PI3K/Akt signaling pathway.
    1. Biochemistry and Chemical Biology

    Exchange of water for sterol underlies sterol egress from a StARkin domain

    George Khelashvili et al.
    The capture and export of a hydrophobic sterol molecule from the binding pocket of a Lam/GramD1 sterol-binding protein is unexpectedly mediated by water.
    1. Computational and Systems Biology

    Mitochondrial dysfunction remodels one-carbon metabolism in human cells

    Xiaoyan Robert Bao et al.
    Mitochondrial respiratory chain dysfunction inhibits mitochondrial one-carbon metabolism, impairing cellular nucleotide biosynthesis.

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