GO:0017136 histone deacetylase activity, NAD-dependent: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0017136 describes the NAD+-dependent histone deacetylase activity of sirtuins, which removes acetyl groups from histone lysines while consuming NAD+ and producing nicotinamide and 2''-O-acetyl-ADP-ribose.
• This activity is evolutionarily conserved from bacteria to humans and is the founding biochemical function of the Sir2 protein family.
• Sirtuins (SIRT1-SIRT7) are the main enzymes carrying this activity in mammals, with SIRT1, SIRT2, SIRT3, SIRT6, and SIRT7 being the most studied histone deacetylases.
• NAD+ availability directly controls this activity, linking it to cellular energy status, circadian rhythm, and metabolic stress.
• Dysregulation of NAD+-dependent histone deacetylase activity is implicated in cancer, sarcopenia, myocardial ischemia-reperfusion injury, and vitiligo.
• CRISPR knockout, point-mutation, knock-in, and overexpression models are essential for dissecting the causal roles of sirtuin genes in these diseases.
Description
Histone deacetylase activity, NAD-dependent (GO:0017136) is a molecular function that catalyzes the removal of acetyl groups from acetylated lysine residues on histone proteins using NAD+ as a co-substrate. This reaction produces nicotinamide, 2''-O-acetyl-ADP-ribose, and deacetylated histone lysines, thereby altering chromatin structure and gene expression. The activity is best known as the defining biochemical property of the Sir2 family of proteins, which includes the seven mammalian sirtuins (SIRT1-SIRT7). Unlike classical zinc-dependent histone deacetylases, this activity is strictly dependent on NAD+, making it a metabolic sensor that couples cellular energy status to epigenetic regulation. Researchers study GO:0017136 because it sits at the intersection of chromatin biology, metabolism, and aging-related diseases. SIRT1, the most extensively characterized mammalian sirtuin, regulates autophagy, circadian rhythms, and stress responses through this activity. SIRT3, SIRT4, and SIRT5 are primarily mitochondrial, where they deacetylate non-histone proteins but retain NAD+-dependent deacetylase chemistry. SIRT6 and SIRT7 have distinct nuclear functions, including DNA repair and ferroptosis resistance. The reaction mechanism involves a unique ADP-ribosyl transfer intermediate and a conformational change that tunnels NAD+ to the active site, as shown for SIRT1. This complexity makes GO:0017136 a rich target for structural, biochemical, and genetic studies. Understanding its regulation and downstream effects requires integrated approaches, including CRISPR-based gene editing, transcriptomics, and metabolomics.
histone deacetylase activity, NAD-dependent At A Glance
| GO ID | GO:0017136 |
|---|---|
| GO term | histone deacetylase activity, NAD-dependent |
| Ontology | molecular_function |
| Synonym | NAD-dependent histone deacetylase activity; SIR2; sirtuin |
| Major function | Removes acetyl groups from histone lysines using NAD+ as a co-substrate, producing nicotinamide and 2''-O-acetyl-ADP-ribose |
| Cofactor | NAD+ is strictly required; the reaction is NAD+-dependent |
| Enzyme family | Sir2 family, including mammalian sirtuins SIRT1-SIRT7 |
| Subcellular localization | Nuclear (SIRT1, SIRT2, SIRT6, SIRT7), mitochondrial (SIRT3, SIRT4, SIRT5), and cytoplasmic (SIRT2) |
| Associated diseases | Cancer, sarcopenia, myocardial ischemia-reperfusion injury, vitiligo |
What Is GO:0017136?
GO:0017136 is defined as the catalysis of the reaction: N(6)-acetyl-L-lysyl-[histone] + NAD+ + H2O = L-lysyl-[protein] + 2''-O-acetyl-ADP-ribose + nicotinamide. In simpler terms, it is an enzymatic activity that removes an acetyl group from a histone lysine and transfers it to NAD+, generating nicotinamide and 2''-O-acetyl-ADP-ribose. This activity is synonymous with NAD-dependent histone deacetylase, NAD-dependent histone lysine deacetylase, SIR2, and sirtuin activity.
Why Is histone deacetylase activity, NAD-dependent Important in Cell Biology?
GO:0017136 is critically important because it links cellular metabolism to epigenetic regulation through NAD+ availability. This activity controls chromatin accessibility, gene expression, DNA repair, and stress responses, and its dysregulation contributes to cancer, metabolic disorders, cardiovascular disease, and aging-related conditions. Because sirtuins are druggable and their activity can be modulated by NAD+ precursors, this GO term is a focal point for therapeutic development.
• Regulates chromatin structure and gene expression by deacetylating histone lysines.
• Acts as a metabolic sensor because NAD+ levels fluctuate with energy status and circadian rhythm.
• Controls autophagy and cell survival in myocardial ischemia-reperfusion injury.
• Modulates muscle homeostasis and is implicated in sarcopenia.
• Influences cancer initiation and progression through epigenetic modifications.
• Protects melanocytes from ferroptosis in vitiligo via SIRT7.
• Provides a conserved mechanism from yeast to humans for NAD+-dependent deacetylation.
• Serves as a target for small-molecule activators and inhibitors in drug discovery.
• Connects mitochondrial function to nuclear gene expression via mitochondrial sirtuins.
• Enables circadian control of NAD+ salvage through CLOCK-SIRT1 feedback.
What Happens During histone deacetylase activity, NAD-dependent?
Substrate binding and NAD+ tunneling
In simple terms: The enzyme grabs the acetylated histone and pulls in NAD+.
The reaction begins when the sirtuin enzyme binds an acetylated lysine on a histone substrate and simultaneously positions NAD+ in the active site. Molecular dynamics studies of SIRT1 have revealed a tunneling mechanism that guides NAD+ from the surface to the catalytic pocket through conformational transitions. This step is rate-limiting and is influenced by NAD+ availability.
Acetyl transfer and intermediate formation
In simple terms: The acetyl group is moved from the histone to NAD+, creating a temporary intermediate.
Once bound, the enzyme cleaves the nicotinamide moiety from NAD+, forming an ADP-ribosyl-enzyme intermediate. The acetyl group from the histone lysine is then transferred to this intermediate, generating 2''-O-acetyl-ADP-ribose and releasing the deacetylated histone. This unique chemistry distinguishes NAD+-dependent deacetylases from zinc-dependent HDACs.
Product release and chromatin remodeling
In simple terms: The deacetylated histone is released, and the chromatin becomes more open or closed depending on context.
After the reaction, nicotinamide and 2''-O-acetyl-ADP-ribose are released, and the deacetylated histone remains bound to DNA. Loss of the acetyl group can alter electrostatic interactions between histones and DNA, leading to changes in chromatin compaction and transcriptional accessibility. Nicotinamide can also feedback-inhibit sirtuin activity, providing a self-regulatory loop.
NAD+ salvage and circadian feedback
In simple terms: The cell recycles nicotinamide back into NAD+ to keep the reaction going.
The NAD+ salvage pathway replenishes NAD+ from nicotinamide, and this pathway is under circadian control via CLOCK-SIRT1 feedback. SIRT1 deacetylates and regulates the activity of CLOCK, which in turn controls the expression of nicotinamide phosphoribosyltransferase (NAMPT), a key salvage enzyme. This creates a rhythmic cycle of NAD+ availability and sirtuin activity that influences gene expression throughout the day.
Key Genes Involved in GO:0017136 histone deacetylase activity, NAD-dependent
The following genes encode proteins that carry or regulate NAD+-dependent histone deacetylase activity (GO:0017136) and are commonly studied in this context.
| Gene | Major Role | Research Relevance |
|---|---|---|
| SIRT1 | Nuclear NAD+-dependent histone deacetylase; regulates chromatin, autophagy, circadian rhythm | Implicated in cancer, sarcopenia, myocardial ischemia-reperfusion injury |
| SIRT2 | Cytoplasmic and nuclear deacetylase; regulates cell cycle and cytoskeleton | Studied in cancer and neurodegeneration |
| SIRT3 | Mitochondrial deacetylase; regulates metabolism and ROS homeostasis | Linked to metabolic disorders and cancer |
| SIRT4 | Mitochondrial sirtuin with ADP-ribosyltransferase and weak deacetylase activity | Roles in insulin secretion and tumor suppression |
| SIRT5 | Mitochondrial desuccinylase and demalonylase; weak histone deacetylase | Involved in metabolic regulation |
| SIRT6 | Nuclear deacetylase; regulates DNA repair, telomere maintenance, and inflammation | Tumor suppressor and aging-related functions |
| SIRT7 | Nuclear deacetylase; regulates rRNA transcription and ferroptosis resistance | Protects melanocytes in vitiligo via SMAD3-ATF3-GPX4 |
| NAMPT | Rate-limiting enzyme in NAD+ salvage pathway | Controls NAD+ availability for sirtuins; circadian regulation |
| CLOCK | Circadian transcription factor; regulated by SIRT1 deacetylation | Links circadian rhythm to NAD+ salvage |
| SMAD3 | Transcription factor activated by SIRT7 in vitiligo | Mediates ferroptosis resistance pathway |
| ATF3 | Stress-responsive transcription factor downstream of SMAD3 | Part of SIRT7-SMAD3-ATF3-GPX4 axis |
| GPX4 | Glutathione peroxidase; protects against lipid peroxidation | Ferroptosis resistance in melanocytes |
| LC3 | Autophagy marker; regulated by SIRT1 | Readout for SIRT1-mediated autophagy |
| p53 | Tumor suppressor; deacetylated by SIRT1 | Links SIRT1 to cancer and stress responses |
| FOXO | Transcription factors; deacetylated by SIRT1 | Regulates autophagy and oxidative stress |
| NF-kB | Inflammatory transcription factor; deacetylated by SIRT1 | Modulates inflammation in disease |
| PGC-1alpha | Mitochondrial biogenesis regulator; deacetylated by SIRT1 and SIRT3 | Metabolic and muscle homeostasis |
| SOD2 | Mitochondrial antioxidant enzyme; deacetylated by SIRT3 | ROS regulation in mitochondria |
How Is histone deacetylase activity, NAD-dependent Regulated?
NAD+-dependent histone deacetylase activity is regulated at multiple levels. The most direct regulator is NAD+ availability, which is controlled by the salvage pathway enzyme NAMPT and by circadian rhythms through CLOCK-SIRT1 feedback. Nicotinamide, a product of the reaction, acts as a physiological inhibitor of sirtuins, providing negative feedback. SIRT1 activity is also modulated by post-translational modifications and protein-protein interactions, including with FOXO and p53. In muscle, SIRT1 signaling is influenced by exercise and nutritional status, affecting sarcopenia progression. Mitochondrial sirtuins are regulated by NAD+ levels in the mitochondrial matrix, which are linked to cellular energy charge. Additionally, SIRT7 activity is regulated by interaction with SMAD3 in the context of ferroptosis resistance.
histone deacetylase activity, NAD-dependent and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| SIRT1 | Cancer, sarcopenia, myocardial ischemia-reperfusion injury | SIRT1 knockout and overexpression cell lines; cardiomyocyte models |
| SIRT6 | Cancer, DNA repair defects | SIRT6 knockout and point-mutation knock-in models |
| SIRT7 | Vitiligo, ferroptosis resistance | SIRT7 overexpression and knockout melanocytes |
| SIRT3 | Metabolic disorders, cancer | SIRT3 knockout and overexpression in mitochondrial models |
| NAMPT | Circadian rhythm disruption, metabolic disease | NAMPT knockout and knock-in models |
Cancer
Sirtuins, particularly SIRT1, SIRT2, SIRT3, SIRT6, and SIRT7, are frequently dysregulated in cancer, where they can act as either tumor promoters or suppressors depending on context. NAD+-dependent histone deacetylase activity influences chromatin remodeling, DNA repair, and apoptosis, making it a therapeutic target. Small-molecule activators and inhibitors of sirtuins are being explored for cancer therapy.
Sarcopenia and muscle wasting
SIRT1 signaling pathways are implicated in sarcopenia, the age-related loss of muscle mass and function. NAD+-dependent deacetylation of targets such as PGC-1alpha and FOXO contributes to mitochondrial function and protein homeostasis in muscle. Modulating SIRT1 activity is considered a potential therapeutic strategy for sarcopenia.
Myocardial ischemia-reperfusion injury
SIRT1 regulates autophagy in the heart, and its activity is protective or detrimental depending on the stage of ischemia-reperfusion injury. NAD+-dependent deacetylation of autophagy-related proteins such as LC3 and FOXO modulates cardiomyocyte survival. Targeting SIRT1 is a promising approach for cardioprotection.
Vitiligo
SIRT7 facilitates ferroptosis resistance in melanocytes by activating the SMAD3-ATF3-GPX4 signaling pathway. Loss of SIRT7 activity leads to increased lipid peroxidation and melanocyte death, contributing to vitiligo pathogenesis. This highlights a non-canonical role for NAD+-dependent deacetylase activity in skin pigmentation disorders.
From histone deacetylase activity, NAD-dependent-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does SIRT1 deacetylase activity regulate autophagy in cardiomyocytes? | SIRT1 knockout and overexpression cell lines |
| What is the role of SIRT7 in ferroptosis resistance in melanocytes? | SIRT7 knockout and overexpression melanocytes |
| How does NAD+ availability affect circadian gene expression? | NAMPT knockout and CLOCK-SIRT1 knock-in models |
| Which histone residues are deacetylated by SIRT6? | SIRT6 point-mutation knock-in cell lines |
| Does SIRT3 deacetylation of SOD2 affect ROS homeostasis? | SIRT3 knockout and tagged knock-in mitochondria |
| Can sirtuin activators rescue sarcopenia phenotypes? | SIRT1 overexpression and knockout muscle cells |
How to Study the histone deacetylase activity, NAD-dependent Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Deacetylase assay | Enzymatic removal of acetyl groups from histones | Confirming sirtuin activity and screening inhibitors |
| RNA-seq | Changes in gene expression | Identifying pathways regulated by SIRT1 or SIRT7 |
| Acetylome profiling | Global lysine acetylation status | Mapping sirtuin substrates |
| NAD+ quantification | Intracellular NAD+ levels | Linking metabolism to sirtuin activity |
| ChIP-seq | Histone acetylation and sirtuin binding at chromatin | Mapping chromatin changes |
| Live-cell imaging | Real-time NAD+ and acetylation dynamics | Circadian and metabolic studies |
| CRISPR knockout | Loss-of-function phenotypes | Causal gene validation |
| CRISPR knock-in | Tagged or mutant sirtuin expression | Tracking localization and activity |
Biochemical deacetylase assays
NAD+-dependent histone deacetylase activity can be measured using fluorogenic or radioactive acetylated histone substrates in the presence of NAD+. These assays are used to confirm enzyme activity and to screen for inhibitors or activators.
Transcriptomics and RNA-seq
RNA sequencing after sirtuin knockout or overexpression reveals changes in gene expression programs controlled by NAD+-dependent deacetylation. This approach is useful for identifying downstream pathways in cancer and muscle biology.
Proteomics and acetylome profiling
Mass spectrometry-based acetylome analysis identifies specific histone and non-histone lysine residues deacetylated by sirtuins. This method provides a global view of sirtuin substrate specificity.
Imaging and live-cell reporters
Fluorescent reporters for NAD+ and histone acetylation enable real-time monitoring of sirtuin activity in living cells. These tools are valuable for studying circadian dynamics and metabolic fluctuations.
How CRISPR Can Be Used to Study GO:0017136 histone deacetylase activity, NAD-dependent
Knockout
CRISPR knockout of SIRT1, SIRT6, SIRT7, or NAMPT eliminates NAD+-dependent histone deacetylase activity, enabling loss-of-function studies in cancer, sarcopenia, and vitiligo models. Knockout cell lines are used to confirm whether a phenotype depends on sirtuin catalytic activity.
Point Mutation
Point mutations in the catalytic domain of sirtuins (e.g., H363Y in SIRT1) abolish deacetylase activity while preserving protein structure, allowing separation of catalytic and scaffolding functions. These models are critical for dissecting the specific contribution of GO:0017136 to disease phenotypes.
Knock-in
Knock-in of epitope-tagged or fluorescently tagged sirtuins enables tracking of protein localization and interaction partners in live cells. Knock-in of disease-associated mutations can model human variants affecting sirtuin activity.
Overexpression
Overexpression of SIRT1, SIRT3, SIRT6, or SIRT7 enhances NAD+-dependent deacetylase activity and is used to test gain-of-function effects in cancer, metabolic, and pigmentation models. Overexpression systems are also useful for biochemical purification of sirtuin complexes.
How EDITGENE Supports histone deacetylase activity, NAD-dependent Research
Researchers studying histone deacetylase activity, NAD-dependent-related genes often need to determine whether a candidate gene is causally involved in a specific phenotype, such as cancer progression, muscle wasting, or ferroptosis resistance. CRISPR-based gene editing provides the most direct way to establish causality by creating knockout, point-mutation, knock-in, or overexpression models in relevant cell types.
Contact EDITGENE today to design your custom CRISPR model for histone deacetylase activity, NAD-dependent research.
Frequently Asked Questions About histone deacetylase activity, NAD-dependent
What is histone deacetylase activity, NAD-dependent?
It is an enzymatic activity (GO:0017136) that removes acetyl groups from histone lysines using NAD+ as a co-substrate, producing nicotinamide and 2''-O-acetyl-ADP-ribose.
What genes are involved in histone deacetylase activity, NAD-dependent?
The main genes are SIRT1-SIRT7, which encode sirtuins, as well as NAMPT, which controls NAD+ availability.
Which enzymes carry NAD-dependent histone deacetylase activity?
Sirtuins (SIRT1-SIRT7) are the primary enzymes with this activity in mammals.
How is NAD-dependent histone deacetylase activity different from classical HDAC activity?
Classical HDACs use zinc and do not require NAD+, whereas NAD-dependent deacetylases require NAD+ and produce 2''-O-acetyl-ADP-ribose.
What diseases are linked to NAD-dependent histone deacetylase activity?
Cancer, sarcopenia, myocardial ischemia-reperfusion injury, and vitiligo have been linked to dysregulated sirtuin activity.
How can I study NAD-dependent histone deacetylase activity in the lab?
Common methods include deacetylase assays, RNA-seq, acetylome profiling, and CRISPR knockout or overexpression models.
What is the role of SIRT1 in circadian rhythm?
SIRT1 deacetylates CLOCK and regulates NAMPT expression, creating a feedback loop that controls NAD+ salvage and circadian gene expression.
Does SIRT7 have a role in vitiligo?
Yes, SIRT7 facilitates ferroptosis resistance in melanocytes via the SMAD3-ATF3-GPX4 pathway, and its loss contributes to vitiligo.
What CRISPR models are available for sirtuin research?
Knockout, point-mutation, knock-in, and overexpression models can be generated for SIRT1-SIRT7 and NAMPT to study their functions.
Why is NAD+ important for histone deacetylase activity?
NAD+ is a required co-substrate; its availability links cellular energy status to epigenetic regulation.
Conclusion
GO:0017136, histone deacetylase activity, NAD-dependent, is a fundamental molecular function that connects cellular metabolism to chromatin regulation through sirtuins. Its roles in cancer, muscle wasting, cardiovascular injury, and pigmentation disorders make it a high-priority target for basic and translational research. CRISPR-based models are indispensable for establishing causality and for developing therapeutic strategies that modulate this activity.
References
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- 3. Najumuddin et al.. 2020. Evidence for NAD(+)-dependent histone dynamics and tunneling associated conformational transitions in circadian deacetylase SIRT1.. J Mol Graph Model 99:107646 PMID: 32531731
- 4. Ding X et al.. 2024. SIRT1 is a regulator of autophagy: Implications for the progression and treatment of myocardial ischemia-reperfusion.. Pharmacol Res 199:106957 PMID: 37820856
- 5. Nakahata Y et al.. 2009. Circadian control of the NAD+ salvage pathway by CLOCK-SIRT1.. Science 324(5927):654-7 PMID: 19286518
- 6. Huang JY et al.. 2010. Mitochondrial sirtuins.. Biochim Biophys Acta 1804(8):1645-51 PMID: 20060508
- 7. Wu L et al.. 2026. SIRT7 facilitates ferroptosis resistance of melanocytes via activating the SMAD3-ATF3-GPX4 signaling pathway in vitiligo.. J Adv Res 82:901-916 PMID: 40659088
- 8. Smith JS et al.. 2000. A phylogenetically conserved NAD+-dependent protein deacetylase activity in the Sir2 protein family.. Proc Natl Acad Sci U S A 97(12):6658-63 PMID: 10841563
