61 results found
    1. Neuroscience

    Risk of punishment influences discrete and coordinated encoding of reward-guided actions by prefrontal cortex and VTA neurons

    Junchol Park, Bita Moghaddam
    Risk of punishment during reward seeking behavior is associated with a functional "disconnection" of the PFC-VTA circuit due to a transient loss of VTA-driven theta oscillation.
    1. Chromosomes and Gene Expression
    2. Evolutionary Biology

    Cis-regulatory evolution integrated the Bric-à-brac transcription factors into a novel fruit fly gene regulatory network

    Maxwell J Roeske et al.
    The conserved biochemical activity of the duplicate Bab transcription factors were integrated into the regulatory hierarchy of an evolving gene regulatory network by binding site gains in a target gene's cis-regulatory region.
    1. Biochemistry and Chemical Biology

    Poly(ADP-ribose) polymerase 1 searches DNA via a ‘monkey bar’ mechanism

    Johannes Rudolph et al.
    By moving between DNA segments like a child swinging on monkey bars, poly(ADP-ribose) polymerase 1 explores possible DNA damage sites more effectively.
    1. Ecology

    Acknowledging selection at sub-organismal levels resolves controversy on pro-cooperation mechanisms

    Wenying Shou
    Building on previous work (Momeni et al., 2013), it is shown that recognizing the hierarchical organization of biological systems resolves the ongoing controversy on pro-cooperation mechanisms.
    1. Genetics and Genomics

    Comparative genetic screens in human cells reveal new regulatory mechanisms in WNT signaling

    Andres M Lebensohn et al.
    A systematic genetic analysis comprising seven genome-wide screens in haploid human cells uncovered new regulatory mechanisms at most levels in the WNT signaling pathway.
    1. Chromosomes and Gene Expression
    2. Neuroscience

    Activation of GCN2 kinase by ribosome stalling links translation elongation with translation initiation

    Ryuta Ishimura et al.
    Activation of the integrated stress response by stalled translation elongation complexes attenuates neurodegeneration, and demonstrates a protective link between a decrease in the rate of translation initiation and defects in translation elongation.
    1. Cell Biology

    Cooperation of the ER-shaping proteins atlastin, lunapark, and reticulons to generate a tubular membrane network

    Songyu Wang et al.
    Experiments with mammalian cells and Xenopus egg extracts elucidate how three proteins cooperate to shape the reticular endoplasmic reticulum network.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Small molecule proteostasis regulators that reprogram the ER to reduce extracellular protein aggregation

    Lars Plate et al.
    Small molecule proteostasis regulators that activate the unfolded protein response transcription factor ATF6 reduce the secretion of amyloid disease-associated proteins.
    1. Computational and Systems Biology
    2. Chromosomes and Gene Expression

    Stochastic modelling, Bayesian inference, and new in vivo measurements elucidate the debated mtDNA bottleneck mechanism

    Iain G Johnston et al.
    New modelling, statistics, and experiments show that cellular populations of mitochondrial DNA (mtDNA) evolve during development according to solvable stochastic dynamics involving binomial partitioning and random turnover, facilitating a predictive and quantitative theory of the mtDNA bottleneck.
    1. Microbiology and Infectious Disease

    Population structuring of multi-copy, antigen-encoding genes in Plasmodium falciparum

    Yael Artzy-Randrup et al.
    Mathematical modeling shows that local populations of the malaria parasite self-organize into a limited number of transient but distinct strains through competition for hosts in immunity space.

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