3,215 results found
    1. Structural Biology and Molecular Biophysics

    Transcription initiation at a consensus bacterial promoter proceeds via a ‘bind-unwind-load-and-lock’ mechanism

    Abhishek Mazumder et al.
    Single-molecule fluorescence experiments reveal transcription initiation proceeds via a 'bind-unwind-load-and-lock' mechanism where promoter DNA unwinds outside the RNA polymerase (RNAP) cleft, the unwound template-DNA loads into the cleft, and RNAP 'locks' the template-DNA by closing the RNAP clamp module.
    1. Computational and Systems Biology
    2. Physics of Living Systems

    First-principles model of optimal translation factors stoichiometry

    Jean-Benoît Lalanne, Gene-Wei Li
    A parsimonious biophysical model correctly predicts the conserved expression stoichiometry of core bacterial mRNA translation factors, providing intuitive and quantitative design principles for in vivo pathway construction.
    1. Cell Biology
    2. Neuroscience

    HIF1α stabilization in hypoxia is not oxidant-initiated

    Amit Kumar et al.
    The current findings address the redox regulation of hypoxia inducible factor 1α (HIF1α) stability in hypoxia by showing that cytosolic, mitochondrial or lipid ROS are not necessary for HIF1α stabilization in hypoxia.
    1. Developmental Biology
    2. Stem Cells and Regenerative Medicine

    Multiscale analysis reveals that diet-dependent midgut plasticity emerges from alterations in both stem cell niche coupling and enterocyte size

    Alessandro Bonfini et al.
    The nutrient composition of food alters both the size of gut epithelial cells and the ability of the stem cell niche to control tissue turnover, resulting in changes in size at the organ level.
    1. Physics of Living Systems
    2. Structural Biology and Molecular Biophysics

    Conformational changes in twitchin kinase in vivo revealed by FRET imaging of freely moving C. elegans

    Daniel Porto et al.
    Quantitative FRET imaging in moving C. elegans shows that stretch-unfolding of twitchin kinase occurs in the active muscle, whereby mechanical activity titrates the signaling pathway of this cytoskeletal kinase.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Competitive binding of MatP and topoisomerase IV to the MukB hinge domain

    Gemma LM Fisher et al.
    Topoisomerase IV and the ter-binding protein MatP competitively bind the hinge domain of the Escherichia coli Structural Maintenance of Chromosomes complex, MukB, leading to spatiotemporal regulation of MukBEF-topoisomerase IV activity.
    1. Structural Biology and Molecular Biophysics

    Structure of mycobacterial CIII2CIV2 respiratory supercomplex bound to the tuberculosis drug candidate telacebec (Q203)

    David J Yanofsky et al.
    The structure of the Mycobacterium smegmatis CIII2CIV2 respiratory supercomplex with telacebec (Q203) bound shows how this tuberculosis drug candidate blocks respiration in mycobacteria.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Quantitative proteomics reveals the selectivity of ubiquitin-binding autophagy receptors in the turnover of damaged lysosomes by lysophagy

    Vinay V Eapen et al.
    A combination of spatial proteomic and autophagic flux approaches was used to reveal the landscape of turnover of damaged lysosomes, demonstrating a key role for the autophagy receptor TAX1BP1 and its associated kinase TBK1 in both HeLa cells and iNeurons.

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