NAD-dependent protein deacetylase sirtuin-7 (SIRT7)

NAD-dependent protein deacetylase that specifically mediates deacetylation of histone H3 at'Lys-18' (H3K18Ac). Compared to other histone deacetylases, displays selectivity for one histone mark, H3K18Ac, directly linked to control of gene expression.

H3K18Ac is mainly present around the transcription start site of genes and has been associated with activation of nuclear hormone receptors. SIRT7 thereby functions as a transcription repressor.