754 results found
    1. Structural Biology and Molecular Biophysics

    Specific Eph receptor-cytoplasmic effector signaling mediated by SAM–SAM domain interactions

    Yue Wang et al.
    Comparative structural studies reveal how the cytoplasmic tails of Eph receptors can differentiate different downstream target proteins via highly specific SAM–SAM domain interactions.
    1. Chromosomes and Gene Expression
    2. Computational and Systems Biology

    Increased longevity due to sexual activity in mole-rats is associated with transcriptional changes in the HPA stress axis

    Arne Sahm et al.
    The fact that sexual activity/reproduction doubles the lifespan of certain rodent species is most likely linked to critical changes in the regulation of the hypothalamic–pituitary–adrenal stress axis.
    1. Chromosomes and Gene Expression

    SAM homeostasis is regulated by CFIm-mediated splicing of MAT2A

    Anna M Scarborough et al.
    The 3'-end formation complex CFIm regulates S-adenosylmethionine (SAM) homeostasis by promoting the splicing of the SAM synthetase transcript, MAT2A.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structure and mechanism of a phage-encoded SAM lyase revises catalytic function of enzyme family

    Xiaohu Guo et al.
    The first structure of a bacteriophage-encoded S-adenosyl methionine degrading enzyme was solved and demonstrated to catalyze a unimolecular lyase reaction occurring at the domain interface of a trimeric structure.
    1. Developmental Biology

    Three-dimensional reconstruction of a whole insect reveals its phloem sap-sucking mechanism at nano-resolution

    Xin-Qiu Wang et al.
    3D reconstruction for an insect provides new internal structures at nanometer resolution, and the reconstructed feeding insect reveals unexpected contraction of stylet protractors and suggested a novel phloem sap-sucking model.
    1. Cell Biology

    The sterol-responsive RNF145 E3 ubiquitin ligase mediates the degradation of HMG-CoA reductase together with gp78 and Hrd1

    Sam A Menzies et al.
    CRISPR/Cas9 genome-wide screens using sterol-sensitive endogenous HMG-CoA reductase (HMGCR) reporter identify the sterol-responsive RNF145 and gp78 as independently responsible for sterol-accelerated degradation of HMGCR, the rate-limiting enzyme of cholesterol biosynthesis.
    1. Neuroscience

    Chimpanzee brain morphometry utilizing standardized MRI preprocessing and macroanatomical annotations

    Sam Vickery et al.
    Openly available structural imaging processing pipeline for chimpanzees including registration templates and macro-anatomical parcellation shows human-like cerebral aging and medial hemispheric organization.
    1. Neuroscience

    Presynaptic GABAB receptors functionally uncouple somatostatin interneurons from the active hippocampal network

    Sam A Booker et al.
    Presynaptic GABAB receptors are highly expressed and strongly suppress synaptic transmission at the input and output of hippocampal somatostatin interneurons.
    1. Chromosomes and Gene Expression

    Caenorhabditis elegans nuclear RNAi factor SET-32 deposits the transgenerational histone modification, H3K23me3

    Lianna Schwartz-Orbach et al.
    H3K23me3 is a RNAi-mediated transgenerationally heritable heterochromatin mark in Caenorhabditis elegans.
    1. Evolutionary Biology

    Neurocranial anatomy of an enigmatic Early Devonian fish sheds light on early osteichthyan evolution

    Alice M Clement et al.
    Stunning new scan data of an enigmatic fish from the Early Devonian of Australia, Ligulalepis, is identified as a stem osteichthyan, specifically, as the sister taxon to the 'psarolepids' plus crown osteichthyans.

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