Sirtuin
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Sirtuin

Any of a class of proteins that possess either histone deacetylase—more commonly—or mono-ribosyltransferase activity, named after Sir2, the cell-regulating yeast gene silent mating-type information regulation 2. Sirtuins regulate critical biological pathways in eubacteria, archaea and eukaryotes.
Sirtuins influence ageing, transcription, apoptosis, stress resistance, and affect energy efficiency and alertness during hypoglycaemia
Most sirtuins are protein deacetylases in which sirtuin-mediated deacetylation couples lysine deacetylation to NAD hydrolysis—instead of simple hydrolysis of acetyl-lysine residues—yielding O-acetyl-ADP-ribose, the deacetylated substrate and nicotinamide. The dependence of sirtuins on NAD links their enzymatic activity directly to the energy status of the cell via the cellular NAD:NADH ratio, the absolute levels of NAD, NADH or nicotinamide or a combination of these variables.

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No references found			5) This finding is corroborated by the increased enzymatic activity of SIR2 proteins in yeast when food availability is reduced. Enhancing cell longevity for cosmetic application: a complementary ... by Moreau, Marielle; Neveu, Michele; Stephan, Sandrine; Noblesse, Emmanuelle; Nizard, Carine; Sadick, N / Journal of Drugs in Dermatology			sinus pacemaker sinus pause sinus rhythm sinus standstill sinus surgery sinus tachycardia Sinus tract sinus venosus defect sinus- SinuSeal Sinuses sinusitis sinusoid sinusoidal sinusotomy SiO 2 Sipam sipauba siphon Siphona siphonage Siphonaptera Sipple's syndrome Sipramine sips/chips Sir2 proteins SIRA sire sirenian sireniform fetus sirenomelia sirenomelus sires of dams pathway sires of sires pathway siresine siriasis SIRM sirolimus sirolimus-eluting coronary stent SIRS Sirtuin SISI SISI test sisomicin sisomicin sulfate sissomicin sister Sister Joseph's nodule Sister Kenny's treatment Sister Mary Joseph Nodule Sistrunk scissors			Sir William Parry Sir William Petty Sir William Ramsay Sir William Rowan Hamilton Sir William Rowan Hamilton Sir William Temple, 1st Baronet Sir William Turner Walton Sir William Wallace Sir William Wallace Sir William Walton Sir Winston Churchill Sir Winston Churchill Sir Winston Churchill High School Sir Winston Leonard Spencer Churchill Sir Winston Leonard Spencer-Churchill Sir Winston Leonard Spenser Churchill Sir y Fflint Sir y Fflint Sir Yehudi Menuhin Sir Yehudi Menuhin Sir, I Do Not Know Sir, That's Freakin Ugly SIR-C SIR-C/X-SAR SIR-JPDAF sir-reverence Sir. SIR/WD Sir2 Sir2 proteins Sira Sira SIRAA Sirach Sirach Sirach, Book of Siracides Siracky, Andrej Sirácky, Andrej Siracusa Siracusa Siracusa, Sicilia SIRAD SIRADS SIRAG Sirah Sirah Rasul Allah Sirah Rasul Allah Siraj-ud-daula Siraj-ud-daula Sirajganj SIRAL SIRAN Siranuish SIRAP Siras Siras Siras Siras Siraskier

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Sirtuin (redirected from Sir2 proteins)

Sirtuin
(redirected from Sir2 proteins)