662 results found
    1. Structural Biology and Molecular Biophysics

    Sampling the conformational space of the catalytic subunit of human γ-secretase

    Xiao-chen Bai et al.
    A masked cryo-EM image classification approach and the structure of an inhibitor-bound complex provide insights into the molecular flexibility of the catalytic subunit of gamma-secretase.
    1. Cell Biology
    2. Neuroscience

    Presenilin mutations deregulate mitochondrial Ca2+ homeostasis and metabolic activity causing neurodegeneration in Caenorhabditis elegans

    Shaarika Sarasija et al.
    In C. elegans, presenilin functions, independent of its gamma-secretase proteolytic activity, to regulate mitochondrial metabolism by controlling ER-mitochondrial calcium transfer and, even in the absence of Abeta signaling, loss of this activity leads to neurodegeneration.
    1. Cell Biology

    Super-resolution microscopy reveals majorly mono- and dimeric presenilin1/γ-secretase at the cell surface

    Abril Angélica Escamilla-Ayala et al.
    Super-resolution microscopy sets a new strategy to comprehend the membrane organization of γ-secretase at single complex resolution identifying nanodomain associations and its diffusion in situ in the living membrane.
    1. Neuroscience

    Cell autonomous regulation of hippocampal circuitry via Aph1b-γ-secretase/neuregulin 1 signalling

    Pietro Fazzari et al.
    Genetic rescue experiments reveal that γ-secretase enzymes containing Aph1b subunits control signalling by type III neuregulin 1, with implications for schizophrenia.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    The amyloid-beta forming tripeptide cleavage mechanism of γ-secretase

    David M Bolduc et al.
    The protease γ-secretase generates amyloid-beta peptides using a mechanism that is driven by the stabilization of an enzyme-substrate scisson complex.
    1. Biochemistry and Chemical Biology

    Science Forum: Donated chemical probes for open science

    Susanne Müller et al.
    A collaboration between several pharmaceutical companies provides a unique resource of high-quality chemical probes and associated data from the companies to the academic community.
    1. Physics of Living Systems

    A mechanism for hunchback promoters to readout morphogenetic positional information in less than a minute

    Jonathan Desponds et al.
    Maternal positional information in the fly embryo can be read rapidly in spite of the gene-expression bottleneck and general examples of regulatory architectures that combine speed and accuracy are provided.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    A mechanism for the extension and unfolding of parallel telomeric G-quadruplexes by human telomerase at single-molecule resolution

    Bishnu P Paudel et al.
    Human telomerase unfolds and extends parallel G-quadruplexes using a unique mechanism involving its RNA template.
    1. Neuroscience

    Temporal selectivity declines in the aging human auditory cortex

    Julia Erb et al.
    The aged human auditory cortex shows preserved tonotopy, but temporal modulations are represented with a markedly broader tuning, highlighting decreased temporal selectivity as a hallmark of the aging auditory cortex.

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