3,019 results found
    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. Epidemiology and Global Health
    2. Plant Biology

    Plant Pathology: Plasmid-powered evolutionary transitions

    Ryan A Melnyk, Cara H Haney
    The acquisition of a virulence plasmid is sufficient to turn a beneficial strain of Rhodococcus bacteria into a pathogen.
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    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. 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

    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. 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.
    1. Microbiology and Infectious Disease

    Exploiting CRISPR-Cas to manipulate Enterococcus faecalis populations

    Karthik Hullahalli et al.
    Conflicts between CRISPR-Cas systems and antibiotic resistance plasmids can be exploited to selectively eliminate antibiotic resistance from Enterococcus faecalis populations.
    1. Chromosomes and Gene Expression
    2. Plant Biology

    Biogenesis of phased siRNAs on membrane-bound polysomes in Arabidopsis

    Shengben Li et al.
    Arabidopsis microRNAs and their effector protein ARGONAUTE1 associate with and act on polysomes on the rough endoplasmic reticulum.
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    Small molecule inhibition of apicomplexan FtsH1 disrupts plastid biogenesis in human pathogens

    Katherine Amberg-Johnson et al.
    An unbiased chemical screen identifies the AAA+ membrane metalloprotease FtsH1 as a novel apicoplast biogenesis factor and druggable antimalarial target.
    1. Neuroscience

    Phasic activation of ventral tegmental neurons increases response and pattern similarity in prefrontal cortex neurons

    Motoko Iwashita
    Transient increases in calcium release in prefrontal cortex neurons, observable only in awake animals, may form the basis of associative learning.

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