3 syllables: Sir, tu, ins. Stress on Sir.
SUR-too-inz
/ˈsɝtuːɪnz/
Sirtuins is pronounced SUR-too-inz (/ˈsɝtuːɪnz/). It has three syllables (Sir-tu-ins), with the stress on "Sir". Sirtuins are a family of NAD+-dependent deacetylase enzymes that regulate aging, metabolism, and stress resistance in cells. They act as protein deacetylases and ADP-r-ribosyltransferases, influencing gene expression and mitochondrial function. The term encompasses several homologous proteins (e.g., SIRT1–SIRT7) that play key roles in longevity research and cellular health.
nounSirtuins are a family of NAD+-dependent deacetylase enzymes that regulate aging, metabolism, and stress resistance in cells. They act as protein deacetylases and ADP-r-ribosyltransferases, influencing gene expression and mitochondrial function. The term encompasses several homologous proteins (e.g., SIRT1–SIRT7) that play key roles in longevity research and cellular health.
How to Pronounce Sirtuins
"Researchers study sirtuins to understand aging and metabolic regulation."
"Sirtuin activity is linked to caloric restriction and stress responses in model organisms."
"Dr. Chen explained how SIRT1 influences fat metabolism and insulin sensitivity."
Sirtuins is pronounced as SUR-too-enz, with primary stress on the first syllable. IPA US: ˈsɜːrˌtuːnz, UK: ˈsɜːtˌjuːnz, AU: ˈsɜːtˌjuːnz. Break it into three parts: sir-TAIL? No: sir-TOO- ins. Start with /ˈsɜːr/ (like ‘sir’ with a slightly rhotic American /ɹ/), then /tuː/ (long u as in ‘tool’), then /nz/ (an audible final /nz/).
Common mistakes: 1) Dropping the /r/ after the first syllable in non-rhotic speakers → say /ˈsɜːt/ with rhotic r in US; 2) Slurring the /tuː/ into /tjuː/ or /tən/; keep a clean /tuː/ as in ‘tool’; 3) Ending with /z/ instead of /nz/ or mispronouncing final cluster; ensure /nz/ rather than /nz/ or /ns/. Practice with minimal pairs to isolate /tuː/ and /nz/ and keep the initial /ˈsɜːr/ clearly articulated.
In US English, /ˈsɜːrˌtuːnz/ with rhotic /ɹ/ and clear /tuː/; UK English tends to /ˈsɜːtˌjuːnz/ with a less rhotic /r/ and a longer /juː/ onset for the second syllable; Australian English is similar to UK but with more centralized vowels; the second syllable often has an affricate-like onset /tƷ/ in rapid speech? Not exactly; keep US-like /tuː/ or /tjuː/? Most Australians approximate /ˈsɜːtjuːnz/ with a closer /tjuː/; rely on local pronunciations.
It combines an unusual cluster: /sɜːr/ plus /tuː/ and the final /nz/. The challenge is the /ˈsɜːr/ syllable romance with the rhotic /r/ for American speakers and the /tuːnz/ cluster at speed, which can blur to /tuːnz/ with /z/ or /nz/ depending on accent. Focus on keeping the /tuː/ distinct and ending with a crisp /nz/.
No silent letters in standard pronunciation. All letters contribute to the sound: /ˈsɜːrˌtuːnz/. The initial /s/ is audible, the ‘ir’ yields /ɜːr/, the ‘tu’ is /tuː/, and the trailing ‘ins’ yields /nz/; avoid reducing or eliding any segment in careful speech.
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Sirtuin derives from the yeast protein Sir2 (Silent Information Regulator 2), whose discovery linked lifespan extension to a sirtuin-like deacetylase. The prefix “si-” echoes silencing genes in yeast research, while “rutin” is not a functional morpheme here; the trailing -uin resembles enzyme nomenclature (like lactate dehydrogenase) to denote a protein family. The Sir2 family was identified in the late 1990s as researchers pursued aging-related genes; the term “sirtuin” emerged to describe the broader, NAD+-dependent deacetylase proteins related to Sir2. Since then, the family expanded to include SIRT1–SIRT7 in humans, reflecting diverse cellular roles. First known use appears in scientific literature around the late 1990s to early 2000s, with early references to Sir2 homologs and their enzymatic activity. The spelling and capitalization have stabilized as “sirtuin” in singular and “sirtuins” in plural, used across biochemistry, molecular biology, and gerontology contexts. Evolution-wise, sirtuins are conserved across organisms, from bacteria to humans, highlighting a shared NAD+-dependent regulatory mechanism that influences chromatin structure, transcription, metabolism, and stress responses. In modern usage, “sirtuin” has become a standard term for a family of proteins central to aging research and metabolic regulation, with SIRT1–SIRT7 representing the major human members.
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Words that rhyme with "Sirtuins"
-ins sounds
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