681 results found
    1. Physics of Living Systems

    Increasing evidence of mechanical force as a functional regulator in smooth muscle myosin light chain kinase

    Fabian Baumann et al.
    Atomic force microscopy based single-molecule force spectroscopy of smooth muscle myosin light chain kinase strongly indicates the existence of a mechanically triggerable activation pathway analogous to its well-established biochemical regulation pathway via calcium-loaded calmodulin.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Cofilin-induced unidirectional cooperative conformational changes in actin filaments revealed by high-speed atomic force microscopy

    Kien Xuan Ngo et al.
    A cluster of cofilin along an otherwise bare actin filament induces distinctively asymmetric cooperative conformational changes to the filament on either side of the cluster.
    1. Physics of Living Systems

    Biophysical properties of single rotavirus particles account for the functions of protein shells in a multilayered virus

    Manuel Jiménez-Zaragoza et al.
    In triple-layered rotavirus particles, strong interaction between the external and middle layers provides high mechanical strength for protection tasks, while weaker interaction between the middle and inner layers favors transcription.
    1. Chromosomes and Gene Expression
    2. Structural Biology and Molecular Biophysics

    CtIP forms a tetrameric dumbbell-shaped particle which bridges complex DNA end structures for double-strand break repair

    Oliver J Wilkinson et al.
    Structural and biochemical analysis of human CtIP provides new insights into DNA break recognition, binding and bridging during homologous recombination.
    1. Biochemistry and Chemical Biology

    Optical manipulation of sphingolipid biosynthesis using photoswitchable ceramides

    Matthijs Kol et al.
    Photoswitchable ceramides containing an azobenzene photoswitch behave as light-controllable substrates for both sphingomyelin synthase and glucosylceramide synthase.
    1. Biochemistry and Chemical Biology

    Unexpected sequences and structures of mtDNA required for efficient transcription from the first heavy-strand promoter

    Akira Uchida et al.
    Hypervariable regions of mtDNA contribute to transcriptional regulation by serving as sites for TFAM binding and looping.
    1. Developmental Biology
    2. Physics of Living Systems

    Rapid changes in tissue mechanics regulate cell behaviour in the developing embryonic brain

    Amelia J Thompson et al.
    During embryonic development, tissue stiffness, which provides an important signal to motile cells, changes locally within tens of minutes in a well-controlled manner.
    1. Cell Biology
    2. Developmental Biology

    Organ sculpting by patterned extracellular matrix stiffness

    Justin Crest et al.
    Direct measurement of finely patterned mechanical properties in a native basement membrane demonstrate how force asymmetries arising from this extracellular matrix, rather than from cells, can precisely sculpt a tissue.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    The physical dimensions of amyloid aggregates control their infective potential as prion particles

    Ricardo Marchante et al.
    Size threshold and suprastructure formation are key parameters that control the infective potential of amyloid fibrils as prion particles.
    1. Structural Biology and Molecular Biophysics

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

    Daniel M Czajkowsky et al.
    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.

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