3,388 results found
    1. Evolutionary Biology

    Contingency and chance erase necessity in the experimental evolution of ancestral proteins

    Victoria Cochran Xie et al.
    Replicating experimental evolution from ancestral proteins shows that historical contingency steadily overwhelms chance and necessity as the primary cause of evolutionary variation in molecular sequences on long phylogenetic timescales.
    1. Biochemistry and Chemical Biology
    2. Evolutionary Biology

    Functional trade-offs and environmental variation shaped ancient trajectories in the evolution of dim-light vision

    Gianni M Castiglione, Belinda SW Chang
    The evolution of the light-sensitive visual pigment rhodopsin involved functional tradeoffs that may have sacrificed rod photosensitivity for active-state protein stability to mitigate phototoxicity in tetrapods, but not in fishes.
    1. Evolutionary Biology

    Fine-tuning citrate synthase flux potentiates and refines metabolic innovation in the Lenski evolution experiment

    Erik M Quandt et al.
    A long-term evolution experiment with Escherichia coli shows that the appearance and optimization of a new trait can require both co-opting existing cellular pathways for new roles and reversing a history of previous adaptation.
    1. Cell Biology
    2. Evolutionary Biology

    Evolution of an ancient protein function involved in organized multicellularity in animals

    Douglas P Anderson et al.
    Experimentally reconstructing the evolution of the molecular complex that animals use to orient the mitotic spindle establishes a simple genetic and physical mechanism for the emergence of a function essential for multicellularity.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Integrating influenza antigenic dynamics with molecular evolution

    Trevor Bedford et al.
    Combined antigenic and genetic analysis shows that different strains of the human influenza virus display dramatically different rates of antigenic drift, and that these differences have a significant impact on the number of new infections in each flu season.
    1. Genetics and Genomics

    Ancient mechanisms for the evolution of the bicoid homeodomain's function in fly development

    Qinwen Liu et al.
    Transgenic animals carrying reconstructed ancestral alleles reveal how two ancient mutations allowed a regulatory protein to evolve a controlling role in embryonic development in flies.
    1. Plant Biology

    Two NLR immune receptors acquired high-affinity binding to a fungal effector through convergent evolution of their integrated domain

    Aleksandra Białas et al.
    The HMA domains of Pikp-1 and Pikm-1 NLR receptors have convergently evolved to bind AVR-PikD with high affinity through distinct evolutionary and biochemical paths.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Parallel evolution between genomic segments of seasonal human influenza viruses reveals RNA-RNA relationships

    Jennifer E Jones et al.
    Phylogenetic relationships between viral RNA segments are distinct between subtypes and lineages of seasonal human influenza A viruses and implicate RNA-RNA relationships as novel drivers of influenza virus evolution.
    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. Evolutionary Biology

    Free-living human cells reconfigure their chromosomes in the evolution back to uni-cellularity

    Jin Xu et al.
    Human cell lines regress to become ‘de-sexualized’ by reconfiguring to a 2:3 X/A ratio of high fitness, thus shedding light on the evolution of mammalian sex chromosomes.

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