6,686 results found
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    Single-particle cryo-EM structure of a voltage-activated potassium channel in lipid nanodiscs

    Doreen Matthies et al.
    The structure of a voltage-activated potassium channel in lipid nanodiscs solved using cryo-electron microscopy is similar to previous X-ray structures, and provides insights into the mechanism of C-type inactivation.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Atomic mutagenesis in ion channels with engineered stoichiometry

    John D Lueck et al.
    Building on previous work (Pless, 2013), we argue that side-chain 'flip out' is a key event in potassium channel C-type inactivation, and propose a new method for encoding multiple noncanonical amino acids and controlling protein stoichiometry.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    The gating cycle of a K+ channel at atomic resolution

    Luis G Cuello et al.
    X-ray crystallographic studies have completed the first atomic resolution description of the kinetic cycle of a potassium channel's pore domain.
    1. Structural Biology and Molecular Biophysics
    2. Neuroscience

    Cooperative and acute inhibition by multiple C-terminal motifs of L-type Ca2+ channels

    Nan Liu et al.
    C-terminus mediated inhibition is one emerging modality of intervention for L-type Ca2+ channels, which coordinate multiple motifs to acutely tune Ca2+ current and Ca2+ influx down to the lower limits preset by end-stage Ca2+-dependent inactivation.
    1. Computational and Systems Biology
    2. Immunology and Inflammation

    Affinity and dose of TCR engagement yield proportional enhancer and gene activity in CD4+ T cells

    Karmel A Allison et al.
    Pre-existing enhancers interpret T cell signaling strength in an analogue manner to direct quantitative changes in gene expression within the context of an overall digital response.
    1. Immunology and Inflammation

    A population of innate myelolymphoblastoid effector cell expanded by inactivation of mTOR complex 1 in mice

    Fei Tang et al.
    A novel population of hematopoietic cells unmasked by mTORC1 inactivation reveals a new mechanism of innate immune tolerance and a new consequence of defective hematopoiesis.
    1. Chromosomes and Gene Expression
    2. Developmental Biology

    FBXL19 recruits CDK-Mediator to CpG islands of developmental genes priming them for activation during lineage commitment

    Emilia Dimitrova et al.
    The ZF-CxxC protein FBXL19 recruits kinase-associated Mediator to CpG islands of silent developmental genes in embryonic stem cells, which primes these genes for activation during differentiation and is required for embryonic development.
    1. Cancer Biology

    MYC activation and BCL2L11 silencing by a tumour virus through the large-scale reconfiguration of enhancer-promoter hubs

    C David Wood et al.
    Epstein-Barr virus controls B-cell growth and survival through large-scale reorganization of the enhancers of the MYC and BCL2L11 genes, and may promote MYC translocations as a result.
    1. Chromosomes and Gene Expression

    GAF is essential for zygotic genome activation and chromatin accessibility in the early Drosophila embryo

    Marissa M Gaskill et al.
    Following fertilization, the pioneering transcription factors GAGA factor (GAF) and Zelda are independently required to reprogram the zygotic genome of Drosophila and activate the first wave of gene expression.
    1. Cell Biology
    2. Chromosomes and Gene Expression

    H3K4 mono- and di-methyltransferase MLL4 is required for enhancer activation during cell differentiation

    Ji-Eun Lee et al.
    MLL4 (KMT2D) is a major mammalian H3K4 mono- and di-methyltransferase that is essential for enhancer activation, cell-type-specific gene expression, and cell differentiation.

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