853 results found
    1. Evolutionary Biology

    Intermolecular epistasis shaped the function and evolution of an ancient transcription factor and its DNA binding sites

    Dave W Anderson et al.
    Experimental mapping of the joint sequence space of an ancient transcription factor (TF) and its DNA binding sites reveals that epistasis across the molecular interface permitted the evolution of a new and specific TF-DNA complex.
    1. Biochemistry and Chemical Biology
    2. Evolutionary Biology

    Enhanced ER proteostasis and temperature differentially impact the mutational tolerance of influenza hemagglutinin

    Angela M Phillips et al.
    Endoplasmic reticulum proteostasis factors enhance the mutational tolerance of influenza hemagglutinin, a model secretory pathway protein and therapeutic target, particularly improving the fitness of temperature-sensitive variants.
    1. Evolutionary Biology
    2. Genetics and Genomics

    Attacks on genetic privacy via uploads to genealogical databases

    Michael D Edge, Graham Coop
    Direct-to-consumer genetic genealogy services that allow users to upload their own datasets are vulnerable to attacks on genetic privacy that exploit the structure of genetic variation.
    1. Evolutionary Biology
    2. Genetics and Genomics

    Testis single-cell RNA-seq reveals the dynamics of de novo gene transcription and germline mutational bias in Drosophila

    Evan Witt et al.
    Single-cell RNA-sequencing and germline substitutions provide novel insights into how testis is a hotspot for evolutionary innovation of genes, expression, and mutation at the single-cell level.
    1. Chromosomes and Gene Expression

    Scc2 counteracts a Wapl-independent mechanism that releases cohesin from chromosomes during G1

    Madhusudhan Srinivasan et al.
    In G1 cells, Scc2 loads and maintains cohesin on chromosomes by counteracting a Wapl-independent releasing activity, which is neutralized in S phase by CDK1.
    1. Cell Biology
    2. Developmental Biology

    Cell-intrinsic and -extrinsic mechanisms promote cell-type-specific cytokinetic diversity

    Tim Davies et al.
    Functional molecular analysis of cytokinesis in Caenorhabditis elegans four-cell embryos reveals cell-type-specific variation in the fundamental dependence on a robust f-actin cytoskeleton for successful cell division, mediated by both cell-intrinsic and -extrinsic pathways.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    MutSα maintains the mismatch repair capability by inhibiting PCNA unloading

    Yoshitaka Kawasoe et al.
    Biochemical analysis in Xenopus egg extracts reveals that the MutSα mismatch sensor retains the DNA-bound replication clamp to maintain a post-replicative temporal window permissive to strand-specific repair of mismatches.
    1. Biochemistry and Chemical Biology
    2. Evolutionary Biology

    Reverse evolution leads to genotypic incompatibility despite functional and active site convergence

    Miriam Kaltenbach et al.
    Enzyme evolution is reversible on a structural and functional (phenotypic) level, but through a different mutational pathway that leads to genotypic incompatibility with the ancestor.
    1. Plant Biology
    2. Structural Biology and Molecular Biophysics

    Identification of distinct pH- and zeaxanthin-dependent quenching in LHCSR3 from Chlamydomonas reinhardtii

    Julianne M Troiano et al.
    Light-harvesting complex stress-related is a protein from photosynthetic green algae that prevents damage from sunlight via two distinct conformational processes, which protect against different timescales of solar fluctuations.
    1. Cell Biology
    2. Developmental Biology

    Physically asymmetric division of the C. elegans zygote ensures invariably successful embryogenesis

    Radek Jankele et al.
    Systematic analysis of C. elegans zygotes manipulated to divide equally demonstrates that daughter cell size asymmetry is critical for proper cell cycle timing, positioning, and fates during subsequent embryogenesis.

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