GO:0033558 protein lysine deacetylase activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0033558 (protein lysine deacetylase activity) is a molecular function defined as the catalysis of the removal of an acetyl group from a lysine residue in a protein.
• The reaction is reversible under certain conditions, and some deacetylases can also catalyze lysine acylation, expanding their functional repertoire.
• Key enzyme families include classical HDACs (HDAC1-11) and NAD+-dependent sirtuins (SIRT1-7), which differ in mechanism, localization, and substrate specificity.
• Beyond histones, deacetylases target non-histone proteins such as tubulin, metabolic enzymes, and RNA-binding proteins, linking the activity to cytoskeletal dynamics, metabolism, and stress responses.
• Dysregulated protein lysine deacetylase activity is implicated in cancer, atherosclerosis, and metabolic disorders, making these enzymes attractive therapeutic targets.
• CRISPR-based knockout, point-mutation, knock-in, and overexpression models are essential for dissecting the causal roles of deacetylases and their substrates in health and disease.
Description
Protein lysine deacetylase activity (GO:0033558) is a fundamental enzymatic function that removes acetyl groups from lysine residues on target proteins. This reversible post-translational modification is catalyzed by two major enzyme families: the classical zinc-dependent histone deacetylases (HDACs) and the NAD+-dependent sirtuins (SIRTs). By erasing acetylation marks, these enzymes regulate protein stability, localization, interactions, and activity, thereby influencing a vast array of cellular processes including gene transcription, metabolism, cytoskeletal dynamics, and stress responses. The importance of protein lysine deacetylase activity extends beyond histone modification. Non-histone substrates such as α-tubulin, metabolic enzymes, and RNA-binding proteins are critical targets that connect deacetylation to diverse physiological and pathological outcomes. For example, HDAC6-catalyzed α-tubulin lactylation regulates cytoskeletal functions and metabolic status, while SIRT3-dependent delactylation of cyclin E2 suppresses hepatocellular carcinoma growth. These findings highlight the broad impact of deacetylase activity on cellular homeostasis and disease. Researchers studying GO:0033558 seek to understand how deacetylases recognize their substrates, how their activity is regulated, and how perturbations contribute to disease. The reversible nature of the reaction, as demonstrated by HDAC-catalyzed lysine acylation, adds another layer of complexity. This article provides a comprehensive overview of the molecular mechanisms, key genes, disease associations, and research methodologies relevant to protein lysine deacetylase activity, with a focus on CRISPR-based approaches for functional interrogation.
protein lysine deacetylase activity At A Glance
| GO ID | GO:0033558 |
|---|---|
| GO term | protein lysine deacetylase activity |
| Ontology | molecular_function |
| Synonym | protein deacetylase activity |
| Definition | Catalysis of the reaction: Removal of an acetyl group from a lysine residue in a protein. |
| Major function | Reverses protein lysine acetylation, regulating protein function, stability, and interactions. |
| Enzyme families | Classical HDACs (zinc-dependent) and sirtuins (NAD+-dependent). |
| Cofactors | Zn2+ for classical HDACs; NAD+ for sirtuins. |
| Substrates | Histones, tubulin, metabolic enzymes, RNA-binding proteins, and many others. |
What Is GO:0033558?
Protein lysine deacetylase activity (GO:0033558) is defined by the Gene Ontology as the catalysis of the reaction: removal of an acetyl group from a lysine residue in a protein. This activity is a molecular function that directly reverses protein lysine acetylation, a common post-translational modification. The reaction typically involves a water molecule (for classical HDACs) or NAD+ (for sirtuins) as a cofactor, and it can be reversible under certain conditions, as shown for some HDACs that also catalyze acylation.
Why Is protein lysine deacetylase activity Important in Cell Biology?
Protein lysine deacetylase activity is central to cellular regulation because it dynamically controls the acetylation status of numerous proteins. This activity impacts gene expression, cell cycle progression, metabolism, and stress responses, and its dysregulation is linked to cancer, cardiovascular disease, and metabolic disorders. Understanding this activity is therefore critical for both basic biology and therapeutic development.
• Regulates gene transcription by deacetylating histone tails, affecting chromatin structure and accessibility.
• Controls non-histone protein functions, including cytoskeletal dynamics via α-tubulin deacetylation.
• Modulates metabolic pathways through deacetylation of enzymes and regulatory proteins.
• Plays a role in stress responses, such as cold tolerance in rice via OsECT3 deacetylation.
• Implicated in cancer: SIRT3-dependent delactylation of cyclin E2 prevents hepatocellular carcinoma growth.
• Contributes to atherosclerosis by promoting smooth muscle cell senescence via HDAC3-primed histone lactylation.
• Serves as a target for therapeutic inhibitors and activators in oncology and metabolic diseases.
• Its reversible nature allows for dynamic regulation of protein function in response to cellular signals.
• Essential for proper development and tissue homeostasis across eukaryotes.
• Provides a mechanism for integrating metabolic cues (e.g., NAD+ levels) into protein regulation.
What Happens During protein lysine deacetylase activity?
Substrate Recognition and Binding
In simple terms: The enzyme finds and grabs onto the target protein.
Deacetylases recognize specific acetylated lysine residues within target proteins through structural motifs such as the catalytic domain and accessory domains. For example, sirtuins like SIRT5 exhibit preferences for certain acyl modifications, including malonyl and succinyl groups. Classical HDACs often function within multiprotein complexes that confer substrate specificity. The binding step is critical for ensuring that deacetylation occurs at the right time and place.
Catalytic Removal of the Acetyl Group
In simple terms: The enzyme cuts the acetyl group off the lysine.
The catalytic mechanism differs between enzyme families. Classical HDACs use a zinc ion to activate a water molecule, which then hydrolyzes the amide bond between the acetyl group and the lysine side chain. Sirtuins, in contrast, consume NAD+ and transfer the acetyl group to ADP-ribose, producing O-acetyl-ADP-ribose and nicotinamide. This reaction is reversible under certain conditions; for instance, HDACs can also catalyze lysine acylation using acyl-CoA donors. The removal of the acetyl group restores the positive charge on the lysine residue, altering protein conformation and interactions.
Product Release and Protein Conformational Change
In simple terms: The modified protein is released and changes shape.
After deacetylation, the target protein undergoes conformational changes that can affect its stability, localization, or binding partners. For example, deacetylation of α-tubulin by HDAC6 promotes microtubule dynamics and cytoskeletal reorganization. The release of the deacetylated protein allows it to participate in downstream signaling or structural roles. The enzyme is then free to catalyze another reaction.
Integration with Cellular Metabolism
In simple terms: The reaction is linked to the cell's energy status.
Sirtuin-mediated deacetylation is directly coupled to cellular metabolism because it requires NAD+, a key redox cofactor. This links deacetylase activity to the metabolic state of the cell. For instance, SIRT5 uses NAD+ to remove succinyl and malonyl groups, connecting mitochondrial metabolism to protein regulation. Similarly, HDAC3 activity can be influenced by metabolic intermediates, as seen in atherosclerosis where HDAC3-primed histone lactylation promotes smooth muscle cell senescence.
Reversibility and Acylation Activity
In simple terms: The enzyme can sometimes put the acetyl group back.
Recent evidence shows that some deacetylases can also catalyze the reverse reaction, adding acyl groups to lysine residues. Tsusaka et al. demonstrated that reversible histone deacetylase activity catalyzes lysine acylation, expanding the functional scope of these enzymes. This reversibility suggests that deacetylases can act as writers as well as erasers, depending on the cellular context and availability of acyl-CoA donors. This dual activity has significant implications for understanding epigenetic regulation and metabolic signaling.
Key Genes Involved in GO:0033558 protein lysine deacetylase activity
The following genes encode proteins with protein lysine deacetylase activity or are closely associated with its regulation and function.
| Gene | Major Role | Research Relevance |
|---|---|---|
| HDAC1 | Classical zinc-dependent deacetylase; component of co-repressor complexes | Regulates transcription, cell cycle, and development; often overexpressed in cancer. |
| HDAC2 | Classical deacetylase; forms complexes with HDAC1 | Involved in chromatin remodeling and gene silencing; target for cancer therapy. |
| HDAC3 | Classical deacetylase; nuclear and cytoplasmic | Regulates metabolism and inflammation; implicated in atherosclerosis via histone lactylation. |
| HDAC6 | Cytoplasmic deacetylase; targets α-tubulin | Regulates cytoskeleton and cell migration; catalyzes α-tubulin lactylation. |
| HDAC8 | Classical deacetylase; unique among HDACs | Involved in smooth muscle contraction and cancer; potential drug target. |
| SIRT1 | NAD+-dependent deacetylase; nuclear and cytoplasmic | Regulates metabolism, aging, and stress responses; deacetylates histones and non-histone proteins. |
| SIRT2 | NAD+-dependent deacetylase; cytoplasmic | Regulates cell cycle and cytoskeleton; implicated in neurodegeneration. |
| SIRT3 | NAD+-dependent deacetylase; mitochondrial | Regulates mitochondrial metabolism; delactylates cyclin E2 to suppress hepatocellular carcinoma. |
| SIRT4 | NAD+-dependent deacetylase; mitochondrial | Regulates insulin secretion and metabolism; has weak deacetylase activity. |
| SIRT5 | NAD+-dependent demalonylase and desuccinylase | Removes malonyl and succinyl groups; links mitochondrial metabolism to protein regulation. |
| SIRT6 | NAD+-dependent deacetylase; nuclear | Regulates DNA repair, telomere maintenance, and metabolism. |
| SIRT7 | NAD+-dependent deacetylase; nucleolar | Regulates ribosomal RNA transcription and stress responses. |
| OsECT3 | RNA-binding protein with acetylation-regulated activity | Lysine acetylation regulates its m6A reader function in cold stress response in rice. |
| TRAP1 | Mitochondrial chaperone; interacts with HDAC3 | Drives smooth muscle cell senescence and atherosclerosis via HDAC3-primed histone lactylation. |
| Cyclin E2 | Cell cycle regulator; substrate of SIRT3 | SIRT3-dependent delactylation prevents hepatocellular carcinoma growth. |
| α-Tubulin | Major cytoskeletal protein; substrate of HDAC6 | HDAC6-catalyzed lactylation regulates cytoskeleton and metabolism. |
| p53 | Tumor suppressor; acetylated and deacetylated | Deacetylation by SIRT1 and HDACs regulates its stability and activity. |
| NF-κB | Transcription factor; regulated by acetylation | Deacetylation by HDAC3 and SIRT1 modulates inflammatory responses. |
How Is protein lysine deacetylase activity Regulated?
Protein lysine deacetylase activity is regulated at multiple levels. Classical HDACs are often recruited to specific genomic loci by transcription factors and co-repressor complexes, while sirtuins are regulated by NAD+ availability, which reflects cellular energy status. Post-translational modifications of the enzymes themselves, such as phosphorylation and acetylation, can modulate their activity. For example, HDAC3 activity can be influenced by metabolic intermediates, as seen in atherosclerosis where HDAC3-primed histone lactylation promotes smooth muscle cell senescence. Additionally, the expression levels of deacetylases are tightly controlled during development and in response to stress. The reversible nature of the reaction, with some HDACs also catalyzing acylation, adds another layer of regulation.
protein lysine deacetylase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| HDAC3 | Atherosclerosis; smooth muscle cell senescence | Knockout or point-mutation in vascular smooth muscle cells; atherosclerosis mouse models. |
| SIRT3 | Hepatocellular carcinoma; cell cycle regulation | Knockout or overexpression in liver cancer cell lines; xenograft models. |
| HDAC6 | Cancer metastasis; cytoskeletal dynamics | Knockout or catalytic-dead point mutant in cancer cells; migration assays. |
| SIRT5 | Metabolic disorders; mitochondrial function | Knockout or overexpression in metabolic tissues; metabolomics. |
| OsECT3 | Cold stress response in rice | Knockout or point-mutation in rice; cold tolerance assays. |
Cancer
Dysregulated protein lysine deacetylase activity is a hallmark of many cancers. Overexpression of HDACs and sirtuins can lead to the deacetylation of tumor suppressors such as p53, promoting cell proliferation and survival. SIRT3-dependent delactylation of cyclin E2 prevents hepatocellular carcinoma growth, indicating a tumor-suppressive role for this specific deacetylase activity. Conversely, HDAC6-mediated α-tubulin lactylation supports cytoskeletal dynamics that may facilitate cancer cell migration and metastasis. Targeting deacetylases with inhibitors is an active area of cancer therapy.
Cardiovascular Disease
Protein lysine deacetylase activity contributes to cardiovascular pathology. In atherosclerosis, TRAP1 drives smooth muscle cell senescence via HDAC3-primed histone H4 lysine 12 lactylation, linking metabolic stress to vascular aging. This suggests that HDAC3 activity and its interplay with lactylation are critical in plaque formation. Modulating deacetylase activity may offer therapeutic benefits in cardiovascular diseases.
Metabolic Disorders
Sirtuins, particularly SIRT3, SIRT4, and SIRT5, regulate mitochondrial metabolism and insulin secretion. SIRT5 is a NAD-dependent demalonylase and desuccinylase, and its activity is linked to metabolic reprogramming. Dysregulation of sirtuin activity has been implicated in obesity, diabetes, and fatty liver disease. Understanding how deacetylation and related deacylation reactions are controlled could lead to new treatments for metabolic disorders.
Plant Stress Responses
In plants, lysine acetylation regulates the activity of RNA-binding proteins such as OsECT3, which functions as an m6A reader in cold stress response in rice. This highlights the evolutionary conservation of deacetylase-mediated regulation and its importance in environmental adaptation. Studying plant deacetylases can provide insights into stress tolerance mechanisms.
From protein lysine deacetylase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of deacetylase activity affect tumor growth? | CRISPR knockout of HDAC or SIRT gene in cancer cell lines; xenograft mouse models. |
| How does a specific point mutation in the catalytic domain alter substrate specificity? | CRISPR point mutation (e.g., catalytic dead) in the endogenous gene locus. |
| What is the effect of a disease-associated mutation on deacetylase function? | Knock-in of the mutant allele using CRISPR homology-directed repair. |
| Where and when is the deacetylase expressed? | Tagged knock-in (e.g., GFP or HA) for imaging and immunoprecipitation. |
| Does overexpression of a deacetylase mimic a disease phenotype? | CRISPR activation or cDNA overexpression in relevant cell types. |
| Which substrates are deacetylated under specific conditions? | Knockout combined with acetyl-proteomics or SILAC-based mass spectrometry. |
How to Study the protein lysine deacetylase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Acetyl-proteomics | Global acetylation levels on lysine residues | Identifying substrates of deacetylases in knockout vs. wild-type cells. |
| In vitro deacetylase assay | Enzymatic activity and kinetics | Characterizing purified enzymes and testing inhibitors. |
| CRISPR knockout screen | Genes required for deacetylase activity or downstream effects | Discovering regulators of acetylation homeostasis. |
| Immunofluorescence | Subcellular localization and acetylation status | Visualizing tubulin lactylation after HDAC6 modulation. |
| Co-immunoprecipitation | Protein-protein interactions | Identifying deacetylase complex components. |
| NAD+ quantification | Cofactor availability for sirtuins | Linking metabolic state to deacetylase activity. |
| Site-directed mutagenesis | Effect of specific mutations on activity | Validating catalytic residues and disease variants. |
| RNA-seq | Transcriptional changes upon deacetylase perturbation | Understanding downstream gene expression effects. |
Acetyl-Proteomics
Mass spectrometry-based acetyl-proteomics allows global identification and quantification of lysine acetylation sites on proteins. By comparing wild-type and deacetylase knockout cells, researchers can identify substrates whose acetylation increases upon loss of enzyme activity. This approach has been used to map substrates of HDACs and sirtuins, including non-histone proteins.
Enzymatic Activity Assays
In vitro deacetylase assays using fluorogenic or radioactive substrates measure the catalytic activity of purified enzymes or immunoprecipitated complexes. These assays can determine kinetic parameters, inhibitor sensitivity, and cofactor requirements (e.g., NAD+ for sirtuins). They are essential for validating the effects of mutations and for drug screening.
CRISPR Screens
Genome-wide CRISPR knockout or activation screens can identify genes that modulate deacetylase activity or that are required for its downstream effects. For example, a screen for regulators of histone acetylation might uncover components of the deacetylase complexes. Such screens are powerful for discovering novel pathways and therapeutic targets.
Imaging and Cellular Assays
Fluorescence microscopy with acetylation-specific antibodies or tagged proteins can visualize changes in acetylation levels and localization in live cells. For instance, HDAC6-mediated α-tubulin lactylation can be monitored using lactylation-specific antibodies and tubulin markers. These methods provide spatial and temporal information about deacetylase function.
How CRISPR Can Be Used to Study GO:0033558 protein lysine deacetylase activity
Knockout
CRISPR knockout of a deacetylase gene (e.g., HDAC3, SIRT3) creates a null allele, allowing researchers to assess the loss-of-function phenotype. This is useful for determining whether the enzyme is required for a specific process, such as tumor growth or stress response. Knockout models can also reveal compensatory mechanisms by other deacetylases.
Point Mutation
Introducing precise point mutations in the catalytic domain (e.g., catalytic dead) via CRISPR can separate enzymatic activity from scaffolding functions. This is critical for understanding whether deacetylation activity per se is responsible for a phenotype. For example, a point mutation in HDAC6 that abolishes deacetylase activity can test its role in cytoskeletal regulation.
Knock-in
Knock-in of disease-associated mutations or tagged versions of deacetylases (e.g., GFP, HA) allows for physiological expression and real-time tracking. This approach can model human mutations in isogenic cell lines or animal models, providing insights into how specific mutations alter enzyme function and contribute to disease.
Overexpression
CRISPR activation (CRISPRa) or cDNA overexpression can elevate deacetylase levels to study gain-of-function effects. Overexpression models are useful for identifying downstream targets and for testing whether increased activity is sufficient to drive a phenotype, such as cancer cell proliferation or metabolic reprogramming.
How EDITGENE Supports protein lysine deacetylase activity Research
Researchers studying protein lysine deacetylase activity-related genes often need to determine whether a candidate gene is causally involved in a specific biological process or disease. This requires precise genetic models that can knockout, mutate, tag, or overexpress the gene of interest in relevant cell types. EDITGENE provides a comprehensive suite of CRISPR-based services to accelerate such investigations, from single-gene editing to genome-wide screening.
Contact EDITGENE today to design your custom CRISPR model for protein lysine deacetylase activity research.
Frequently Asked Questions About protein lysine deacetylase activity
What is protein lysine deacetylase activity?
Protein lysine deacetylase activity (GO:0033558) is the enzymatic removal of an acetyl group from a lysine residue on a protein, reversing acetylation and regulating protein function.
What genes are involved in protein lysine deacetylase activity?
Key genes include HDAC1-11 (classical HDACs) and SIRT1-7 (sirtuins), as well as associated proteins like TRAP1 and OsECT3.
What is the difference between HDACs and sirtuins?
HDACs are zinc-dependent enzymes that use water for catalysis, while sirtuins are NAD+-dependent and consume NAD+ to remove acetyl groups.
How is protein lysine deacetylase activity regulated?
It is regulated by cofactor availability (e.g., NAD+ for sirtuins), post-translational modifications, recruitment to complexes, and metabolic signals.
What diseases are associated with deacetylase activity?
Dysregulation is linked to cancer, atherosclerosis, metabolic disorders, and plant stress responses.
Can deacetylases also add acetyl groups?
Yes, recent studies show that some HDACs can catalyze lysine acylation, making the reaction reversible under certain conditions.
What methods are used to study deacetylase activity?
Common methods include acetyl-proteomics, in vitro activity assays, CRISPR screens, and imaging with acetylation-specific antibodies.
How can CRISPR help study protein lysine deacetylase activity?
CRISPR enables knockout, point mutation, knock-in, and overexpression of deacetylase genes to dissect their causal roles in cellular processes and disease.
What is the role of SIRT5?
SIRT5 is an NAD-dependent demalonylase and desuccinylase that removes malonyl and succinyl groups from lysine residues, linking metabolism to protein regulation.
Why is protein lysine deacetylase activity important in cancer?
It regulates tumor suppressors and oncogenes; for example, SIRT3-dependent delactylation of cyclin E2 prevents hepatocellular carcinoma growth.
Conclusion
Protein lysine deacetylase activity (GO:0033558) is a pivotal molecular function that controls protein acetylation dynamics across diverse cellular processes. From histones to metabolic enzymes and cytoskeletal proteins, deacetylases and their substrates are implicated in cancer, cardiovascular disease, and metabolic disorders. The reversible nature of the reaction and the ability of some enzymes to catalyze acylation add layers of complexity that warrant further investigation. CRISPR-based models are indispensable for establishing causality and for developing targeted therapies. EDITGENE's comprehensive services empower researchers to explore this critical activity with precision and efficiency.
References
- 1. Tsusaka T et al.. 2025. Reversible histone deacetylase activity catalyzes lysine acylation.. Nat Chem Biol 21(9):1387-1396 PMID: 40140626
- 2. Li X et al.. 2024. TRAP1 drives smooth muscle cell senescence and promotes atherosclerosis via HDAC3-primed histone H4 lysine 12 lactylation.. Eur Heart J 45(39):4219-4235 PMID: 39088352
- 3. Ma N et al.. 2025. Regulation of m(6)A RNA reader protein OsECT3 activity by lysine acetylation in the cold stress response in rice.. Nat Plants 11(6):1165-1180 PMID: 40542084
- 4. Du J et al.. 2011. Sirt5 is a NAD-dependent protein lysine demalonylase and desuccinylase.. Science 334(6057):806-9 PMID: 22076378
- 5. Sun S et al.. 2024. Metabolic regulation of cytoskeleton functions by HDAC6-catalyzed α-tubulin lactylation.. Nat Commun 15(1):8377 PMID: 39333081
- 6. Shen Y et al.. 2015. Histone Acetylation Enzymes Coordinate Metabolism and Gene Expression.. Trends Plant Sci 20(10):614-621 PMID: 26440431
- 7. Fiorentino F et al.. 2022. Therapeutic Potential and Activity Modulation of the Protein Lysine Deacylase Sirtuin 5.. J Med Chem 65(14):9580-9606 PMID: 35802779
- 8. Jin J et al.. 2023. SIRT3-dependent delactylation of cyclin E2 prevents hepatocellular carcinoma growth.. EMBO Rep 24(5):e56052 PMID: 36896611
