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Repairing split ends: SIRT6, mono-ADP ribosylation and DNA repair Van Meter M; Mao Z; Gorbunova V; Seluanov AAging (Albany NY) 2011[Sep]; 3 (9): 829-35The sirtuin gene family comprises an evolutionarily ancient set of NAD+ dependent protein deacetylase and mono-ADP ribosyltransferase enzymes. Found in all domains of life, sirtuins regulate a diverse array of biological processes, including DNA repair, gene silencing, apoptosis and metabolism. Studies in multiple model organisms have indicated that sirtuins may also function to extend lifespan and attenuate age-related pathologies. To date, most of these studies have focused on the deacetylase activity of sirtuins, and relatively little is known about the other biochemical activity of sirtuins, mono-ADP ribosylation. We recently reported that the mammalian sirtuin, SIRT6, mono-ADP ribosylates PARP1 to promote DNA repair in response to oxidative stress. In this research perspective we review the role of SIRT6 in DNA repair and discuss the emerging implications for sirtuin directed mono-ADP ribosylation in aging and age-related diseases.|*DNA Repair[MESH]|ADP Ribose Transferases/*metabolism[MESH]|Adenosine Diphosphate Ribose/*metabolism[MESH]|Animals[MESH]|DNA Breaks, Double-Stranded[MESH]|Genomic Instability[MESH]|Humans[MESH]|Isoenzymes/genetics/*metabolism[MESH]|Poly (ADP-Ribose) Polymerase-1[MESH]|Poly(ADP-ribose) Polymerases/metabolism[MESH]|Sirtuins/genetics/*metabolism[MESH] |
