2,665 results found
    1. Evolutionary Biology

    Convergent evolution of small molecule pheromones in Pristionchus nematodes

    Chuanfu Dong et al.
    Unexpected structural diversity of nematode small molecules, as revealed by high-resolution phylogenetic analysis, suggests recurrent biochemical innovation, a pattern that is probably typical across animals.
    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. Evolutionary Biology

    Determining the probability of hemiplasy in the presence of incomplete lineage sorting and introgression

    Mark S Hibbins et al.
    Introgression makes hemiplasy more likely, and the probability of hemiplasy incorporating incomplete lineage sorting (ILS) and introgression can be estimated using the presented simulation software.
    1. Evolutionary Biology
    2. Neuroscience

    A cerebellar substrate for cognition evolved multiple times independently in mammals

    Jeroen B Smaers et al.
    Multiple independent directional selection events on a neural substrate that underpins domain-general associative abilities partly explains independent occurrences of complex behavior in different lineages of mammals.
    1. Evolutionary Biology

    Subterranean mammals show convergent regression in ocular genes and enhancers, along with adaptation to tunneling

    Raghavendran Partha et al.
    Repeated evolution of eye regression in subterranean mammals helps identify genes and regulatory elements involved in visual perception and development of the eye, and predicts candidate sequences with a potential role in ocular disorders.
    1. Neuroscience

    An insect-like mushroom body in a crustacean brain

    Gabriella Hannah Wolff et al.
    An insect-like mushroom body in one group of crustaceans, the mantis shrimps (Stomatopoda), suggests either an ancient origin of this center and its reduction and loss in other crustaceans, or an extraordinary example of convergent evolution with the insect mushroom body.
    1. Structural Biology and Molecular Biophysics
    2. Evolutionary Biology

    An atomic-resolution view of neofunctionalization in the evolution of apicomplexan lactate dehydrogenases

    Jeffrey I Boucher et al.
    The convergent evolution of unusually strict substrate specificity in apicomplexan LDHs arose by classic neofunctionalization of a duplicated MDH gene via few mutations of large effect.
    1. Evolutionary Biology

    Plasticity and evolutionary convergence in the locomotor skeleton of Greater Antillean Anolis lizards

    Nathalie Feiner et al.
    A comparative and experimental research refutes the controversial hypothesis that plasticity played a major role in the convergent evolution of Anolis ecomorphs.
    1. Developmental Biology
    2. Structural Biology and Molecular Biophysics

    Large, long range tensile forces drive convergence during Xenopus blastopore closure and body axis elongation

    David R Shook et al.
    Blastopore closure in Xenopus is driven by two morphogenic mechanisms that have strongly context dependent effects on tissue movement and that generate tensile force across tissues: convergent extension, as expected, and, unexpectedly, convergent thickening.
    1. Structural Biology and Molecular Biophysics
    2. Computational and Systems Biology

    Molecular dynamics-based refinement and validation for sub-5 Å cryo-electron microscopy maps

    Abhishek Singharoy et al.
    New hybrid structure determination methods leveraging the inherent biophysical properties of a macromolecule through molecular dynamics simulations provide accurate and cost-efficient ways of achieving atomic structures from high resolution cryo-electron density maps.

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