title: Carbohydrates induce mono-ubiquitination of H2B in yeast.
abstract: Histone modifications have emerged to be a major regulatory mechanism for gene expression (1-4). However, it is not clear how histone modifications are physiologically regulated. Here, we show that mono-ubiquitinated H2B at lysine 123 (uH2B) in the yeast (Saccharomyces cerevisiae) is present in exponential phase and absent in stationary phase. A wide array of carbohydrates or sugars, including glucose, fructose, mannose, and sucrose, are capable of inducing uH2B in stationary phase yeast. In contrast, non-metabolic glucose analogs are defective in inducing uH2B. Furthermore, uH2B induction is inhibited by iodoacetate, an inhibitor of glyceraldehyde-3-phosphate dehydrogenase in glycolysis. Moreover, uH2B induction is markedly impaired in yeast mutants, in which glycolytic genes are deleted. These data indicate that glycolysis is required for the carbohydrate-induced mono-ubiquitination of H2B at lysine 123. Therefore, our study reveals a novel paradigm of metabolic regulation of histone modifications.
authors.affiliation: Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10021, USA.
authors.forename: Lin
authors.initials: L
authors.lastname: Dong
authors.forename: C Wilson
authors.initials: CW
authors.lastname: Xu
mesh_terms: D005947:Glucose / Q000494:pharmacology*; D006019:Glycolysis; D006657:Histones / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000235:genetics / Q000254:growth & development / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins / Q000378:metabolism*; D025801:Ubiquitin / Q000378:metabolism*
chemical_list: D006657:Histones; D029701:Saccharomyces cerevisiae Proteins; D025801:Ubiquitin; D005947:Glucose