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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

SIRT3, a human SIR2 homologue, is an NAD-dependent deacetylase localized to mitochondria.

The SIR2 (silent information regulator 2) gene family has diverse functions in yeast including gene silencing, DNA repair, cell-cycle progression, and chromosome fidelity in meiosis and aging. Human homologues, termed sirtuins, are highly conserved but are of unknown function. We previously identified a large imprinted gene domain on 11p15.5 and investigated the 11p15.5 sirtuin SIRT3. Although this gene was not imprinted, we found that it is localized to mitochondria, with a mitochondrial targeting signal within a unique N-terminal peptide sequence. The encoded protein was found also to possess NAD(+)-dependent histone deacetylase activity. These results suggest a previously unrecognized organelle for sirtuin function and that the role of SIRT3 in mitochondria involves protein deacetylation.[1]

References

  1. SIRT3, a human SIR2 homologue, is an NAD-dependent deacetylase localized to mitochondria. Onyango, P., Celic, I., McCaffery, J.M., Boeke, J.D., Feinberg, A.P. Proc. Natl. Acad. Sci. U.S.A. (2002) [Pubmed]
 
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