9,225 results found
    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. Evolutionary Biology
    2. Plant Biology

    The role of photorespiration during the evolution of C4 photosynthesis in the genus Flaveria

    Julia Mallmann et al.
    Metabolic exaptation of an anaplerotic nitrogen cycle between bundle sheath and mesophyll cells may explain the remarkably frequent convergent evolution of C4 photosynthesis.
    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.
    1. Evolutionary Biology

    Experimental evolution reveals hidden diversity in evolutionary pathways

    Peter A Lind et al.
    Genetic architecture governs the evolvability of adaptive paths providing a framework for evolutionary forecasting.
    1. Chromosomes and Gene Expression
    2. Evolutionary Biology

    Genomic architecture and evolutionary antagonism drive allelic expression bias in the social supergene of red fire ants

    Carlos Martinez-Ruiz et al.
    Analyses of allelic- and socially-biased gene expression reveal that suppressed recombination causes most of the expression differences in the social supergene, with only few differences due to socially antagonistic selection.

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