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708 results found
    1. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    Mechanism of environmentally driven conformational changes that modulate H-NS DNA-bridging activity

    Ramon A van der Valk et al.
    The DNA-bridging efficiency of H-NS, a genome organising and transcription regulatory protein, is modulated by changes in environmental conditions of the cell, which drive a structural rearrangement of the protein.
    1. Biochemistry and Chemical Biology
    2. Computational and Systems Biology

    Molecular basis for the adaptive evolution of environment-sensing by H-NS proteins

    Xiaochuan Zhao et al.
    Combining in silico and experimental approaches to identify and understand the residue changes in the H-NS protein that allowed bacteria to adapt environment-sensing to different habitats.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Bridged filaments of histone-like nucleoid structuring protein pause RNA polymerase and aid termination in bacteria

    Matthew V Kotlajich et al.
    Bridged H-NS filaments inhibit transcript elongation by bacterial RNA polymerase by enhancing backtracking and increasing Rho-dependent termination at a subset of pause sites that are normally poor Rho substrates.
    1. Microbiology and Infectious Disease

    The horizontally-acquired response regulator SsrB drives a Salmonella lifestyle switch by relieving biofilm silencing

    Stuti K Desai et al.
    A response regulator acquired via lateral gene transfer has rewired an ancestral genetic circuitry and regulates alternative pathogenic lifestyles.
    1. Cancer Biology
    2. Cell Biology

    TP53 exon-6 truncating mutations produce separation of function isoforms with pro-tumorigenic functions

    Nitin H Shirole et al.
    Genetic and molecular analysis of TP53 exon-6 truncating mutations reveal that these mutations, contrary to current belief, promote tumorigenesis and point towards strategies for treating cancers driven by these prevalent mutations.
    1. Structural Biology and Molecular Biophysics

    Allosteric signalling in the outer membrane translocation domain of PapC usher

    Irene Farabella et al.
    Input from computational models has enabled the detection of allosteric communication that modulates the gating mechanism of a bacterial outer-membrane protein.
    1. Chromosomes and Gene Expression
    2. Evolutionary Biology

    Chromatinization of Escherichia coli with archaeal histones

    Maria Rojec et al.
    Escherichia coli is surprisingly tolerant to chromatinization by archaeal histones, suggesting that histones can become established as ubiquitous chromatin proteins without interfering critically with some key DNA-templated processes.
    1. Physics of Living Systems

    Upper bound on the biological effects of 50/60 Hz magnetic fields mediated by radical pairs

    PJ Hore
    Any effects of environmental 50/60 Hz magnetic fields on human biology due to a radical pair mechanism should be no more dangerous than those incurred by travelling a few kilometres.
    1. Cell Biology
    2. Neuroscience

    Tenectin recruits integrin to stabilize bouton architecture and regulate vesicle release at the Drosophila neuromuscular junction

    Qi Wang et al.
    Characterization of Tnc as a selective integrin ligand at the Drosophila NMJ allows for unprecedented insights into our understanding of extracellular matrix/integrin interactions at synaptic locations and reveals novel, distinct presynaptic and postsynaptic integrin functions.
    1. Structural Biology and Molecular Biophysics

    Site-specific effects of neurosteroids on GABAA receptor activation and desensitization

    Yusuke Sugasawa et al.
    Differential, state-dependent occupancy of three discrete binding sites on α1β3 GABAA receptors determines whether a specific neurosteroid analogue potentiates or inhibits GABA-elicited currents or competitively antagonizes neurosteroid action.

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