4,251 results found
    1. Evolutionary Biology
    2. Genetics and Genomics

    A natural variant of the essential host gene MMS21 restricts the parasitic 2-micron plasmid in Saccharomyces cerevisiae

    Michelle Hays et al.
    A novel assay to measure 2-micron stability together with a survey of natural variation among Saccharomyces cerevisiae strains reveals novel means by which yeasts can combat the parasitic 2-micron plasmids.
    1. Cell Biology
    2. Evolutionary Biology

    Chimeric origins of ochrophytes and haptophytes revealed through an ancient plastid proteome

    Richard G Dorrell et al.
    An in silico reconstruction of a chloroplast that existed hundreds of millions of years ago casts new insights in the evolutionary processes, endosymbioses and chimerism events that shape the origin of plastids.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Apicomplexan-like parasites are polyphyletic and widely but selectively dependent on cryptic plastid organelles

    Jan Janouškovec et al.
    Apicomplexan-like parasites originated several times independently and many of them contain cryptic plastid organelles, which demonstrate that the parasites evolved from photosynthetic algae.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Collateral sensitivity associated with antibiotic resistance plasmids

    Cristina Herencias et al.
    Acquisition of antibiotic resistance plasmids induces collateral sensitivity to clinically relevant antibiotics in Escherichia coli, paving the way for targeted 'anti-plasmid' therapies able to preferentially eliminate plasmid-carrying bacteria.
    1. Neuroscience

    Transient inhibition and long-term facilitation of locomotion by phasic optogenetic activation of serotonin neurons

    Patrícia A Correia et al.
    Phasic activation of dorsal raphe serotonin neurons transiently inhibits locomotion without influencing anxiety or producing reinforcement, but when repeated over many days a long-term facilitation of locomotion is produced.
    1. Evolutionary Biology
    2. Genetics and Genomics

    Rapid adaptation to malaria facilitated by admixture in the human population of Cabo Verde

    Iman Hamid et al.
    Admixture-mediated adaptation to malaria in a human population demonstrates that detectible signatures in genomic patterns of ancestry can be leveraged to better characterize recent selection in populations with mixed ancestry.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Mechanochemical coupling and bi-phasic force-velocity dependence in the ultra-fast ring ATPase SpoIIIE

    Ninning Liu et al.
    Probing the DNA motor SpoIIIE at the single-molecule level has revealed its force-generating step, rich translocation dynamics during motor operation and a novel, bi-phasic mechanical response to opposing force.
    1. Neuroscience

    Phasic and tonic neuron ensemble codes for stimulus-environment conjunctions in the lateral entorhinal cortex

    Maryna Pilkiw et al.
    Neuron populations in the lateral entorhinal cortex discriminate between memory-based contexts through both continuous "tonic" activity patterns as well as by their stimulus-evoked "phasic" responses.
    1. Neuroscience

    Pupil-linked phasic arousal predicts a reduction of choice bias across species and decision domains

    Jan Willem de Gee et al.
    Across species and domains of decision-making, pupil-linked phasic arousal predicts suppression biases in the accumulation of evidence leading up to a choice.
    1. Evolutionary Biology
    2. Plant Biology

    Evolution of alternative biosynthetic pathways for vitamin C following plastid acquisition in photosynthetic eukaryotes

    Glen Wheeler et al.
    Genomic evidence suggests that L-gulonolactone oxidase-the terminal enzyme in vitamin C synthesis, which has been repeatedly lost throughout animal evolution-was lost in plants and other photosynthetic eukaryotes following plastid acquisition.

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