Cited by 75Sirtuins and Resveratrol in MedicineBiochemical and Molecular ResearchGenetics, Aging, and Longevity in Model Organisms

Assimilation of Endogenous Nicotinamide Riboside Is Essential for Calorie Restriction-mediated Life Span Extension in Saccharomyces cerevisiae

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Lu, Shu-Ping, Kato, Michiko, Lin, Su-Ju·2009·Journal of Biological Chemistry

Abstract

NAD(+) (nicotinamide adenine dinucleotide) is an essential cofactor involved in various biological processes including calorie restriction-mediated life span extension. Administration of nicotinamide riboside (NmR) has been shown to ameliorate deficiencies related to aberrant NAD(+) metabolism in both yeast and mammalian cells. However, the biological role of endogenous NmR remains unclear. Here we demonstrate that salvaging endogenous NmR is an integral part of NAD(+) metabolism. A balanced NmR salvage cycle is essential for calorie restriction-induced life span extension and stress resistance in yeast. Our results also suggest that partitioning of the pyridine nucleotide flux between the classical salvage cycle and the NmR salvage branch might be modulated by the NAD(+)-dependent Sir2 deacetylase. Furthermore, two novel deamidation steps leading to nicotinic acid mononucleotide and nicotinic acid riboside production are also uncovered that further underscore the complexity and flexibility of NAD(+) metabolism. In addition, utilization of extracellular nicotinamide mononucleotide requires prior conversion to NmR mediated by a periplasmic phosphatase Pho5. Conversion to NmR may thus represent a strategy for the transport and assimilation of large nonpermeable NAD(+) precursors. Together, our studies provide a molecular basis for how NAD(+) homeostasis factors confer metabolic flexibility.

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Authors
Lu, S.-P., Kato, M., & Lin, S.-J.
Affiliations
University of California, Davis (US)
Corresponding author
Lin, Su-Ju
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2009-06
Volume
284
Issue
25
Pages
17110-17119
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2030392188
Cited by
75
References
49
Citations by year
2026: 3 · 2025: 1 · 2024: 3 · 2023: 2 · 2022: 5 · 2021: 4 · 2020: 3 · 2019: 3 · 2018: 4 · 2017: 7 · 2016: 3 · 2015: 7 · 2014: 4 · 2013: 6 · 2012: 6
FWCI
4.50
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute on Aging (R01AG024351)
Topics
  • Health Sciences › Medicine › Geriatrics and Gerontology › Sirtuins and Resveratrol in Medicine
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Biochemical and Molecular Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
nicotinamide riboside, NAD+ metabolism, caloric restriction, lifespan extension, Saccharomyces cerevisiae, nicotinic acid mononucleotide, nicotinamide mononucleotide, stress tolerance, NAD+ homeostasis
MeSH terms
Animals, Genes, Fungal, Hot Temperature, Histone Deacetylases, Longevity, Mammals, Models, Biological, Mutation, NAD, Niacinamide, N-Glycosyl Hydrolases, Pentosyltransferases, Pyridinium Compounds, Saccharomyces cerevisiae, Stress, Physiological, Time Factors, Saccharomyces cerevisiae Proteins, Caloric Restriction, Sirtuins, Silent Information Regulator Proteins, Saccharomyces cerevisiae, Sirtuin 2

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