NAD-dependent deacetylase sirtuin-2 is an enzyme that in humans is encoded by the SIRT2gene.
This gene encodes a member of the sirtuin family of proteins, homologs to the yeast Sir2 protein. Members of the sirtuin family are characterized by a sirtuin core domain and grouped into four classes. Studies suggest that the human sirtuins may function as intracellular regulatory proteins with mono-ADP-ribosyltransferase activity. The protein encoded by this gene is included in class I of the sirtuin family. Two transcript variants result from alternative splicing of this gene.
The functions of human sirtuins have not yet been determined; however, model organisms have been used in the study of SIRT2 function. Yeast sirtuin proteins are known to regulate epigenetic gene silencing and suppress recombination of rDNA.
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