427 results found
    1. Neuroscience

    Reinforcement biases subsequent perceptual decisions when confidence is low, a widespread behavioral phenomenon

    Armin Lak et al.
    Confidence-dependent reinforcement learning is active and produces trial-to-trial choice updating even in well-learned perceptual decisions without explicit reward biases, across species and sensory modalities.
    1. Neuroscience

    Dopamine neurons learn relative chosen value from probabilistic rewards

    Armin Lak et al.
    When learning the reward probability of novel cues, dopamine neurons convey dissociable value and novelty signals.
    1. Neuroscience

    Activation of MAP3K DLK and LZK in Purkinje cells causes rapid and slow degeneration depending on signaling strength

    Yunbo Li et al.
    The activity levels of two closely related MAPKKK are differentially regulated in Purkinje neuron survival.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Ezrin activation by LOK phosphorylation involves a PIP2-dependent wedge mechanism

    Thaher Pelaseyed et al.
    Phosphorylation of ezrin involves an unusual mechanism requiring coincident binding to PIP2 and involvement of the non-catalytic domain to gain access to the phosphorylation site thereby restricting selective phosphorylation to the plasma membrane.
    1. Biochemistry and Chemical Biology
    2. Immunology and Inflammation

    Fine-tuning of substrate preferences of the Src-family kinase Lck revealed through a high-throughput specificity screen

    Neel H Shah et al.
    A high-throughput comparison of substrate specificities of the Src-family kinases Lck and c-Src against a library of proteome-derived phosphorylation sites reveals that Lck has evolved divergent electrostatic features reflecting its involvement in T-cell signaling.
    1. Immunology and Inflammation
    2. Structural Biology and Molecular Biophysics

    An electrostatic selection mechanism controls sequential kinase signaling downstream of the T cell receptor

    Neel H Shah et al.
    A high-throughput technique to characterize the substrate specificities of tyrosine kinases identifies the key features of kinases and substrates that enforce accurate signaling from T cell receptors.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Constitutive turnover of histone H2A.Z at yeast promoters requires the preinitiation complex

    Michael Tramantano et al.
    The transcription machinery is required for the disassembly of the promoter-proximal H2A.Z nucleosome, contributing to the constitutive histone turnover at yeast promoters.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    VivosX, a disulfide crosslinking method to capture site-specific, protein-protein interactions in yeast and human cells

    Chitra Mohan et al.
    An in vivo disulfide crosslinking assay shows preferential disassembly of nucleosomes with two H2A.Z histones by transcription machinery in yeast and conjugation to one or two ubiquitin moieties in human cells.
    1. Chromosomes and Gene Expression

    Live-cell single particle imaging reveals the role of RNA polymerase II in histone H2A.Z eviction

    Anand Ranjan et al.
    Histone variant H2A.Z is deposited near transcription start sites by the chromatin remodeler SWR1 and seems to be removed by RNA polymerase II at an early stage of transcription elongation.
    1. Developmental Biology

    Nodal and planar cell polarity signaling cooperate to regulate zebrafish convergence and extension gastrulation movements

    Margot LK Williams, Lilianna Solnica-Krezel
    Nodal signaling regulates gastrulation cell behaviors largely in parallel with planar cell polarity signaling and is sufficient for ex vivo extension of embryonic explants.

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