92 results found
    1. Structural Biology and Molecular Biophysics

    Altered expression of a quality control protease in E. coli reshapes the in vivo mutational landscape of a model enzyme

    Samuel Thompson et al.
    Changes to cellular protein homeostasis reveal widespread advantageous effects of destabilizing mutations, opening the possibility to switch mutational landscapes back-and-forth from permissive to restrictive.
    1. Computational and Systems Biology
    2. Evolutionary Biology

    Adaptation to mutational inactivation of an essential gene converges to an accessible suboptimal fitness peak

    João V Rodrigues, Eugene I Shakhnovich
    When an essential metabolic gene in E. coli is mutationally inactivated, subsequent evolution rarely reverts the mutation to wild type but rather follows unexpected paths that rewire metabolic fluxes.
    1. Structural Biology and Molecular Biophysics
    2. Computational and Systems Biology

    Transient protein-protein interactions perturb E. coli metabolome and cause gene dosage toxicity

    Sanchari Bhattacharyya et al.
    Weak yet highly species-specific protein-protein interactions enhance the activity of metabolically related enzymes in bacteria at endogenous conditions, but also mean that overexpression of one partner leads to permanent non-physiological complexes and gene dosage toxicity.
    1. Neuroscience

    A versatile genetic tool for post-translational control of gene expression in Drosophila melanogaster

    Sachin Sethi, Jing W Wang
    A chemogenetic tool has been developed to map and manipulate neuronal circuits with spatial and temporal precision.
    1. Biochemistry and Chemical Biology
    2. Evolutionary Biology

    Homologue replacement in the import motor of the mitochondrial inner membrane of trypanosomes

    Corinne von Känel et al.
    Mitochondrial inner membrane translocation of presequence-containing proteins by the single bifunctional TIM complex of T. brucei requires an non-canonical J domain-containing protein.
    1. Computational and Systems Biology

    A large accessory protein interactome is rewired across environments

    Zhimin Liu et al.
    A massively multiplexed multi-condition screen shows that protein interactomes are larger than previously thought and contain highly dynamic regions that reorganize to drive or respond to cellular changes.
    1. Biochemistry and Chemical Biology

    Mitochondrial ClpX activates an essential biosynthetic enzyme through partial unfolding

    Julia R Kardon et al.
    The mitochondrial protein unfoldase ClpX activates the first enzyme in heme biosynthesis, ALAS, by targeted unfolding that gates access of cofactor to the ALAS active site.
    1. Microbiology and Infectious Disease
    2. Medicine

    A randomized feasibility trial comparing four antimalarial drug regimens to induce Plasmodium falciparum gametocytemia in the controlled human malaria infection model

    Isaie J Reuling et al.
    Controlled human malaria infection model allows the study of gametocyte biology and dynamics providing novel insights and tools in malaria transmission and elimination efforts.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Measuring protein stability in the GroEL chaperonin cage reveals massive destabilization

    Ilia Korobko et al.
    Protein stability in the cage formed by the chaperonin GroEL and its cofactor GroES is reduced by more than 5 kcal mol-1 relative to that in bulk solution.
    1. Cell Biology

    Stress-mediated exit to quiescence restricted by increasing persistence in CDK4/6 activation

    Hee Won Yang et al.
    Application of a live-cell reporter for CDK4/6 activity reveals rapid activity changes and reversibility in the cell-cycle entry signaling program.

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