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Stem cells are characterized by their ability to asymmetrically divide, generating another self-renewing stem cell and a differentiating daughter cell. They reside within the local niche microenvironment, which, together with systemic signals, regulates intrinsic stem cell function. Stem cells are finely regulated, with even slight deregulation leading to gain of stem cell function and tumorigenesis...
O-GlcNAc transferase (OGT) and O-GlcNAcase (OGA) catalyze the dynamic cycling of intracellular, post-translational O-GlcNAc modification on thousands of Ser/Thr residues of cytosolic, nuclear, and mitochondrial signaling proteins. The identification of O-GlcNAc modified substrates has revealed a functionally diverse set of proteins, and the extent of O-GlcNAcylation fluctuates in response to nutrients...
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