Active turnover of genomic methylcytosine in pluripotent cells

Spada, Fabio; Schiffers, Sarah; Kirchner, Angie ; Zhang, Yingqian; Arista, Gautier; Kosmatchev, Olesea; Korytiaková, Eva; Rahimoff, René ; Ebert, Charlotte und Carell, Thomas (10. August 2020): Active turnover of genomic methylcytosine in pluripotent cells. In: Nature Chemical Biology

Abstract

Epigenetic plasticity underpins cell potency, but the extent to which active turnover of DNA methylation contributes to such plasticity is not known and the underlying pathways are poorly understood. Here we use metabolic labelling with stable isotopes and mass spectrometry to quantitatively address the global turnover of genomic methylcytidine (mdC), hydroxymethylcytidine (hmdC) and formylcytidine (fdC) across mouse pluripotent cell states. High rates of mdC/hmdC oxidation and fdC turnover characterize a formative-like pluripotent state. In primed pluripotent cells the global mdC turnover rate is about 3-6% faster than can be explained by passive dilution through DNA synthesis. While this active component is largely dependent on Tet-mediated mdC oxidation, we unveil additional oxidation-independent mdC turnover, possibly through DNA repair. This process accelerates upon acquisition of primed pluripotency and returns to low levels in lineage committed cells. Thus, in pluripotent cells active mdC turnover involves both mdC oxidation-dependent and independent processes.

• Dokumententyp: Zeitschriftenartikel
• EU Funded Grant Agreement Number: 741912
• EU-Projekte: Horizon 2020 > ERC Grants > ERC Advanced Grant > ERC Grant 741912: EPiR - The Chemical Basis of RNA Epigenetics
• Publikationsform: Postprint
• Fakultät: Chemie und Pharmazie > Department Chemie
• Themengebiete: 500 Naturwissenschaften und Mathematik > 540 Chemie ; 500 Naturwissenschaften und Mathematik > 570 Biowissenschaften; Biologie
• Sprache: Englisch

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