Current Genetics

, Volume 65, Issue 5, pp 1113–1119 | Cite as

Cross-talk in NAD+ metabolism: insights from Saccharomyces cerevisiae

  • Christol James Theoga Raj
  • Su-Ju LinEmail author


NAD+ (nicotinamide adenine dinucleotide) is an essential metabolite involved in a myriad of cellular processes. The NAD+ pool is maintained by three biosynthesis pathways, which are largely conserved from bacteria to human with some species-specific differences. Studying the regulation of NAD+ metabolism has been difficult due to the dynamic flexibility of NAD+ intermediates, the redundancy of biosynthesis pathways, and the complex interconnections among them. The budding yeast Saccharomyces cerevisiae provides an efficient genetic model for the isolation and study of factors that regulate specific NAD+ biosynthesis pathways. A recent study has uncovered a putative cross-regulation between the de novo NAD+ biosynthesis and copper homeostasis mediated by a copper-sensing transcription factor Mac1. Mac1 appears to work with the Hst1–Sum1–Rfm1 complex to repress the expression of de novo NAD+ biosynthesis genes. Here, we extend the discussions to include additional nutrient- and stress-sensing pathways that have been associated with the regulation of NAD+ homeostasis. NAD+ metabolism is an emerging therapeutic target for several human diseases. NAD+ preservation also helps ameliorate age-associated metabolic disorders. Recent findings in yeast contribute to the understanding of the molecular basis underlying the cross-regulation of NAD+ metabolism and other signaling pathways.


NAD+ metabolism Sir2 family Nutrient signaling Stress signaling Transcription Gene silencing 



This work is supported by NIGMS, National institute of Health, Grant GM102297. The authors declare that they have no conflicts of interest with the contents of the article.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Microbiology and Molecular Genetics, College of Biological SciencesUniversity of CaliforniaDavisUSA

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