Review
doi: 10.1111/j.1753-4887.2008.00127.x.
A novel, enigmatic histone modification: biotinylation of histones by holocarboxylase synthetase
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- PMID: 19019041
- DOI: 10.1111/j.1753-4887.2008.00127.x
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Review
A novel, enigmatic histone modification: biotinylation of histones by holocarboxylase synthetase
Nutr Rev.
2008 Dec.
Abstract
Holocarboxylase synthetase catalyzes the covalent binding of biotin to histones in humans and other eukaryotes. Eleven biotinylation sites have been identified in histones H2A, H3, and H4. K12-biotinylated histone H4 is enriched in heterochromatin, repeat regions, and plays a role in gene repression. About 30% of the histone H4 molecules are biotinylated at K12 in histone H4 in human fibroblast telomeres. The abundance of biotinylated histones at distinct genomic loci depends on biotin availability. Decreased histone biotinylation decreases life span and stress resistance in Drosophila. Low enrichment of biotinylated histones at transposable elements impairs repression of these elements.
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