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Class I histone deacetylases Hos1 and related proteins Saccharomyces cerevisiae Hos1 is responsible for Smc3 deacetylation. Smc3 is an important player during the establishment of sister chromatid cohesion. Hos1 belongs to the class I histone deacetylases (HDACs). HDACs are Zn-dependent enzymes that catalyze hydrolysis of N(6)-acetyl-lysine residues in histone amino termini to yield a deacetylated histone (EC 3.5.1.98). Enzymes belonging to this group participate in regulation of a number of processes through protein (mostly different histones) modification (deacetylation). Class I histone deacetylases in general act via the formation of large multiprotein complexes. Other class I HDACs are animal HDAC1, HDAC2, HDAC3, HDAC8, fungal RPD3 and HOS2, plant HDA9, protist, archaeal and bacterial (AcuC) deacetylases. Members of this class are involved in cell cycle regulation, DNA damage response, embryonic development, cytokine signaling important for immune response and in posttranslational control of the acetyl coenzyme A synthetase. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",