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Current Drug Targets


ISSN (Print): 1389-4501
ISSN (Online): 1873-5592

Human Sirtuins: An Overview of an Emerging Drug Target in Age-Related Diseases and Cancer

Author(s): Alessandra Donadini, Camillo Rosano, Lamberto Felli and Marco Ponassi

Volume 14, Issue 6, 2013

Page: [653 - 661] Pages: 9

DOI: 10.2174/1389450111314060006

Price: $65


Sir2-like proteins (Sirtuins) are a class of enzymes conserved throughout the kingdoms of life. In fact, from Archaea to Mammals, these (class III) NAD+-dependent deacetylases catalyse the removal of the acetyl moiety from a substrate protein. Sirtuins show a conserved central catalytic domain with two more variable amino- and carboxy-terminal flanking regions. Amino acid comparison of these central conserved catalytic core sequences allows us to divide Sirtuins into five different classes (I, II, III, IV and U). These proteins differ in their subcellular localization (i.e. in Eukaryotes they can be found in the nucleus, cytoplasm or mitochondria). In humans there are seven Sirtuins (SIRT1-7) that are implicated in various physiological processes including aging and age-related disorders such as neoplasms, cardiovascular, metabolic and neurodegenerative diseases, and inflammation. Nowadays, the estimated life expectancy is definitely longer than in the past thus, we may consider all aging-related problems as having a strong social impact. Consequently, Sirtuins are emerging, particularly from a pharmacological point of view, as new and valuable drug targets.

Keywords: Aging, caloric restriction, cancer, deacetylase, drug targets, NAD+, X-ray crystallography.

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