356 results found
    1. Cell Biology
    2. Chromosomes and Gene Expression

    Sir2 phosphorylation through cAMP-PKA and CK2 signaling inhibits the lifespan extension activity of Sir2 in yeast

    Woo Kyu Kang et al.
    The deacetylase Sir2 fine-tunes transcription of PMA1 and other aging related genes in a cAMP-PKA and CK2 signaling dependent manner.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Heterochromatin assembly by interrupted Sir3 bridges across neighboring nucleosomes

    Reza Behrouzi et al.
    Cooperative association of a histone-binding complex with pairs of appropriately modified nucleosomes, which form fundamental units of binding, mediates selective heterochromatin assembly and spreading.
    1. Cell Biology

    SIRT2 deacetylase regulates the activity of GSK3 isoforms independent of inhibitory phosphorylation

    Mohsen Sarikhani et al.
    Mass spectroscopy, molecular modeling and/or molecular dynamics simulations reveal how acetylation regulates the activity of GSK3 isoforms independent of inhibitory phosphorylation.
    1. Neuroscience

    SIR-2.1 integrates metabolic homeostasis with the reproductive neuromuscular excitability in early aging male Caenorhabditis elegans

    Xiaoyan Guo, L René García
    A protein called SIR-2.1 helps to protect worms from the effects of aging by regulating metabolic processes that would otherwise generate damaging reactive oxygen species.
    1. Biochemistry and Chemical Biology

    Tyr1 phosphorylation promotes phosphorylation of Ser2 on the C-terminal domain of eukaryotic RNA polymerase II by P-TEFb

    Joshua E Mayfield et al.
    The phosphorylation of tyrosine in the heptad repeat of the C-terminal domain of the largest subunit of RNA polymerase II promotes Ser2 phosphorylation by P-TEFb for pausing release.
  1. Webinar Report: Sir Henry Dale Fellowships from the Royal Society and the Wellcome Trust.

    In the second webinar in our postdoctoral fellowships series, we heard about the Sir Henry Dale Fellowships funded by the Royal Society and the Wellcome Trust.
    1. Chromosomes and Gene Expression

    The Ku subunit of telomerase binds Sir4 to recruit telomerase to lengthen telomeres in S. cerevisiae

    Evan P Hass, David C Zappulla
    In yeast, the secondary pathway for recruiting telomerase to chromosome ends requires a component of telomeric transcriptionally silent chromatin.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    SIRT2 and lysine fatty acylation regulate the transforming activity of K-Ras4a

    Hui Jing et al.
    A new post-translational regulatory mechanism of K-Ras is identified, which expands the function of reversible protein lysine fatty acylation and offers new possibility to target the K-Ras oncoprotein.
    1. Chromosomes and Gene Expression

    Epigenetics: Silencing sounds off

    Yu-Fan Chen, Marc R Gartenberg
    Insight
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    1. Cell Biology
    2. Developmental Biology

    tRNA synthetase counteracts c-Myc to develop functional vasculature

    Yi Shi et al.
    In addition to its cytoplasmic role for translation, the seryl-tRNA synthetase also antagonizes the c-Myc transcription factor in the nucleus to transcriptionally repress the growth factor VEGFA and ensure proper development of the vasculature in vertebrates.

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