3,871 results found
    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. Neuroscience

    Hippocampal place cells construct reward related sequences through unexplored space

    H Freyja Ólafsdóttir et al.
    In anticipation of a reward, hippocampal place cells simulate desired journeys through areas that have been seen, but not explored.
    1. Biochemistry and Chemical Biology

    Intrinsic sequence specificity of the Cas1 integrase directs new spacer acquisition

    Clare Rollie et al.
    The acquisition of new foreign DNA by the prokaryotic adaptive immune system CRISPR-Cas is shown to depend on the fundamental sequence specificity of the Cas1 integrase.
    1. Evolutionary Biology

    Adaptation in protein fitness landscapes is facilitated by indirect paths

    Nicholas C Wu et al.
    The extra dimensions in protein sequence space open up indirect paths of adaptation and alleviate the constraint on the selective accessibility to high fitness genotypes.
    1. Evolutionary Biology

    Coupling adaptive molecular evolution to phylodynamics using fitness-dependent birth-death models

    David A Rasmussen, Tanja Stadler
    A new model describes how adaptive molecular evolution shapes phylogenetic trees and can be used to estimate the fitness effects of mutations from phylogenies.
    1. Neuroscience
    2. Physics of Living Systems

    Replay as wavefronts and theta sequences as bump oscillations in a grid cell attractor network

    Louis Kang, Michael R DeWeese
    An experimentally supported model of grid cells naturally enables them to participate in firing sequences that encode rapid trajectories in space.
    1. Microbiology and Infectious Disease

    Type III CRISPR-Cas systems can provide redundancy to counteract viral escape from type I systems

    Sukrit Silas et al.
    Cooperation between evolutionarily disparate CRISPR-Cas modules allows bacteria to counter mutational escape by viruses.
    1. Ecology
    2. Genetics and Genomics

    Viral dark matter and virus–host interactions resolved from publicly available microbial genomes

    Simon Roux et al.
    From public microbial genomes, VirSorter revealed 12,498 viral genome sequences that expand the map of the global virosphere and whose analyses improve understanding of viral taxonomy, evolution and virus-host interactions.
    1. Computational and Systems Biology
    2. Neuroscience

    Flexible theta sequence compression mediated via phase precessing interneurons

    Angus Chadwick et al.
    A new model for phase precession accounts for theta sequence generation, suggests critical roles for interneurons, and predicts circuit properties to optimise memory storage.
    1. Neuroscience

    EM connectomics reveals axonal target variation in a sequence-generating network

    Jörgen Kornfeld et al.
    Combining light microscopy and electron microscopy uncovered patterns of neural connectivity in a zebra finch forebrain region capable of generating song-related sequential activity, contributing to our understanding of the neural circuitry that underlies skilled motor performance.

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