30 years old: O-GlcNAc Reaches Age of Reason - Regulation of Cell Signaling and Metabolism by O-GlcNAcylation

Hundreds post-translational modifications (PTM) were characterized among which a large variety of glycosylations including O-GlcNAcylation. Since its discovery, O-GlcNAcylation has emerged as an unavoidable PTM widespread in the living beings including animal and plant cells, protists, bacteria and...

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Main Author: Tarik Issad (auth)
Other Authors: Tony Lefebvre (auth)
Format: Book Chapter
Published: Frontiers Media SA 2015
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Online Access:Get Fullteks
DOAB: description of the publication
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041 0 |a English 
042 |a dc 
100 1 |a Tarik Issad  |4 auth 
700 1 |a Tony Lefebvre  |4 auth 
245 1 0 |a 30 years old: O-GlcNAc Reaches Age of Reason - Regulation of Cell Signaling and Metabolism by O-GlcNAcylation 
260 |b Frontiers Media SA  |c 2015 
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520 |a Hundreds post-translational modifications (PTM) were characterized among which a large variety of glycosylations including O-GlcNAcylation. Since its discovery, O-GlcNAcylation has emerged as an unavoidable PTM widespread in the living beings including animal and plant cells, protists, bacteria and viruses. In opposition to N- and O-glycosylations, O-GlcNAcylation only consists in the transfer of a single N-acetylglucosamine moiety through a beta-linkage onto serine and threonine residues of proteins confined within the cytosol, the nucleus and the mitochondria. The O-GlcNAc group is provided by UDP-GlcNAc, the end-product of the hexosamine biosynthetic pathway located at the crossroad of cell metabolisms making O-GlcNAcylation a PTM which level tightly reflects nutritional status; therefore regulation of cell homeostasis should be intimately correlated to lifestyle and environment. Like phosphorylation, with which it can compete, O-GlcNAcylation is reversible. This versatility is managed by OGT (O-GlcNAc transferase) that transfers the GlcNAc group and OGA (O-GlcNAcase) that removes it. Also, like its unsweetened counterpart, O-GlcNAcylation controls fundamental processes, e.g. protein fate, chromatin topology, DNA demethylation and, as recently revealed, circadian clock. Deregulation of O-GlcNAc dynamism may be involved in the emergence of cancers, neuronal and metabolic disorders such as Alzheimer's or diabetes respectively. This Research Topic in Frontiers in Endocrinology is the opportunity to celebrate the thirtieth anniversary of the discovery of "O-GlcNAc" by Gerald W. Hart. 
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546 |a English 
653 |a nutrition 
653 |a Hexosamine biosynthetic pathway 
653 |a O GlcNAcylation 
653 |a OGA 
653 |a Inflammation 
653 |a Metabolism 
653 |a OGT 
653 |a Cell signaling 
653 |a epigenetics 
653 |a Cancer 
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