GO:0047609 acetylputrescine deacetylase activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0047609 acetylputrescine deacetylase activity is a molecular_function defined as the catalysis of N-acetylputrescine + H2O = acetate + putrescine.
• The activity is a polyamine deacetylation reaction that reverses polyamine acetylation and controls the balance between acetylated and free putrescine pools.
• Enzymes with this activity belong to the histone deacetylase (HDAC) superfamily and include HDAC10 in humans and acetylpolyamine amidohydrolases in bacteria.
• HDAC10 is the best-characterized human enzyme with acetylputrescine deacetylase activity and shows a strong preference for acetylated polyamines over acetylated lysine substrates.
• The reaction is relevant to cancer biology, polyamine metabolism, and microbial polyamine catabolism, making it a target for inhibitor and substrate-specificity studies.
• CRISPR knockout, point-mutation, knock-in, and overexpression models are used to test whether candidate genes such as HDAC10 causally mediate acetylputrescine deacetylase activity.
Description
GO:0047609 acetylputrescine deacetylase activity is a molecular_function term in the Gene Ontology that describes the hydrolysis of N-acetylputrescine to acetate and putrescine. In practical terms, it is the enzymatic removal of an acetyl group from an acetylated polyamine, regenerating the free diamine putrescine. This reaction is part of the broader polyamine acetylation/deacetylation cycle that controls intracellular polyamine pools, which are essential for cell growth, differentiation, and stress responses. The term is therefore of interest to researchers studying polyamine homeostasis, chromatin regulation, and microbial metabolism. The activity has been experimentally linked to enzymes in the histone deacetylase superfamily, particularly HDAC10 in humans and acetylpolyamine amidohydrolases in bacteria such as Pseudomonas aeruginosa. Because HDAC10 can deacetylate acetylputrescine and related acetylpolyamines, it has become a model enzyme for understanding how substrate specificity is achieved within the HDAC family. At the same time, bacterial acetylpolyamine amidohydrolases provide comparative insight into the catalytic and physiological roles of this activity outside mammals. Researchers use this GO term to annotate gene products, interpret omics data, and design experiments that test the function of candidate deacetylases. The term is also relevant to drug discovery, because selective inhibitors of HDAC10 and related enzymes depend on accurate knowledge of substrate preference and catalytic mechanism.
acetylputrescine deacetylase activity At A Glance
| GO ID | GO:0047609 |
|---|---|
| GO term | acetylputrescine deacetylase activity |
| Ontology | molecular_function |
| Synonym | N-acetylputrescine acetylhydrolase activity |
| Definition | Catalysis of the reaction: N-acetylputrescine + H2O = acetate + putrescine. |
| Major function | Hydrolytic removal of an acetyl group from N-acetylputrescine to release putrescine and acetate. |
| Reaction direction | Hydrolysis (deacetylation) of an acetylated polyamine. |
| Representative enzymes | HDAC10 in humans; acetylpolyamine amidohydrolases in bacteria such as Pseudomonas aeruginosa. |
| Related activity | Polyamine deacetylation within the histone deacetylase superfamily. |
What Is GO:0047609?
In my own words, GO:0047609 acetylputrescine deacetylase activity describes the catalytic function of an enzyme that uses water to cleave the acetyl group from N-acetylputrescine, producing acetate and putrescine. It is a hydrolase activity acting on a carbon-nitrogen bond in an acetylated polyamine, and it is synonymous with N-acetylputrescine acetylhydrolase activity. The reaction is chemically simple but biologically important because it determines whether putrescine remains acetylated or is returned to the free polyamine pool.
Why Is acetylputrescine deacetylase activity Important in Cell Biology?
GO:0047609 acetylputrescine deacetylase activity matters because it sits at the intersection of polyamine metabolism and protein deacetylation biology. Polyamines such as putrescine, spermidine, and spermine are required for cell proliferation and are tightly regulated; acetylation and deacetylation control their availability and catabolism. Enzymes that carry this activity, notably HDAC10, have been studied as potential drug targets because their substrate preference differs from classical histone deacetylases. Understanding this activity therefore helps researchers interpret polyamine flux, design selective inhibitors, and assign function to uncharacterized deacetylase genes.
• Defines a specific enzymatic step in polyamine acetylation/deacetylation cycles that control putrescine levels.
• Provides a functional annotation for HDAC10 and related enzymes that prefer acetylpolyamines over acetyllysine substrates.
• Supports drug discovery by enabling assays that measure deacetylation of acetylputrescine and related substrates.
• Helps distinguish polyamine deacetylases from other histone deacetylase superfamily members with different substrate specificity.
• Links to microbial polyamine catabolism through bacterial acetylpolyamine amidohydrolases.
• Enables comparative studies of polyamine metabolism across species, including nematodes and bacteria.
• Provides a basis for CRISPR-based tests of whether candidate genes are required for the activity in cells.
• Supports interpretation of metabolomic and transcriptomic data in cancer and metabolic studies.
• Aids in the design of selective chemical probes and inhibitors for HDAC10 and related enzymes.
• Helps researchers avoid mis-annotating generic deacetylase activity when the true substrate is an acetylpolyamine.
Molecular Mechanism of acetylputrescine deacetylase activity
Substrate recognition and binding
In simple terms: The enzyme first grabs the acetylated putrescine molecule in a pocket that fits its shape.
Enzymes with acetylputrescine deacetylase activity bind N-acetylputrescine in an active-site cavity that accommodates the polyamine chain and the acetyl group. Crystallographic snapshots of HDAC10 have shown how substrate binding occurs in the active site and how the enzyme positions the acetyl group for catalysis. Substrate-specificity studies indicate that HDAC10 prefers acetylated polyamines such as N-acetylputrescine and N-acetylspermidine over acetylated lysine substrates, which distinguishes it from other HDAC superfamily members. Bacterial acetylpolyamine amidohydrolases also show distinct preferences among acetylpolyamine substrates, supporting the idea that substrate recognition is a key determinant of this activity.
Catalytic hydrolysis of the acetyl group
In simple terms: Water is used to cut the acetyl group off the putrescine molecule.
The catalytic step is a hydrolysis reaction in which water attacks the acetyl carbonyl, leading to release of acetate and putrescine. This reaction is the defining chemistry of GO:0047609 and is catalyzed by enzymes in the histone deacetylase superfamily. HDAC10 uses a metal-dependent mechanism typical of HDAC enzymes, and structural studies have captured substrate-bound states that illuminate the catalytic cycle. The reaction is reversible in principle, but under physiological conditions it drives deacetylation and regenerates free putrescine.
Cofactors and metal dependence
In simple terms: The enzyme uses a metal ion and a charge-relay system to perform the chemistry.
HDAC10 and related polyamine deacetylases belong to the histone deacetylase superfamily, which typically employs a zinc ion and a charge-relay system for catalysis. Structural work on HDAC10 has revealed the active-site architecture and metal coordination that support acetylpolyamine deacetylation. Bacterial acetylpolyamine amidohydrolases also depend on metal-based catalysis, consistent with the conserved chemistry of this activity across kingdoms.
Regulation and substrate competition
In simple terms: The activity can be tuned by which substrates are available and by inhibitors that block the active site.
The activity of enzymes with acetylputrescine deacetylase function is influenced by the availability of acetylated polyamines and by competing substrates. HDAC10 can deacetylate acetylputrescine and N-acetylspermidine, and selective inhibitors have been developed that engage the enzyme in cells. Substrate-specificity profiling across HDAC superfamily members has shown that small synthetic substrates can distinguish enzymes with different preferences, which is useful for assigning activity in vitro. In bacteria, acetylpolyamine amidohydrolases contribute to polyamine catabolism and are regulated by the availability of acetylated polyamines.
Biological context and downstream effects
In simple terms: The reaction changes the pool of free putrescine, which affects cell growth and stress responses.
By converting N-acetylputrescine to putrescine, this activity influences the balance between acetylated and free polyamines. Polyamines are required for cell proliferation, and their acetylation/deacetylation is a major regulatory node. In nematodes, a distinct putrescine-acetylating enzyme has been described, highlighting the diversity of polyamine-modifying reactions across organisms. In bacteria, acetylpolyamine amidohydrolases support polyamine recycling and catabolism. Together, these findings show that GO:0047609 is part of a broader network that controls polyamine homeostasis.
Key Genes Involved in GO:0047609 acetylputrescine deacetylase activity
The following genes and proteins are experimentally associated with acetylputrescine deacetylase activity or with the polyamine acetylation/deacetylation pathways that contextualize this GO term.
| Gene | Major Role | Research Relevance |
|---|---|---|
| HDAC10 | Human histone deacetylase with acetylpolyamine deacetylase activity, including acetylputrescine deacetylation | Primary human model for GO:0047609; target of selective inhibitors and structural studies |
| HDAC6 | HDAC superfamily member used in comparative substrate-specificity studies | Helps distinguish polyamine-preferring deacetylases from other HDACs |
| HDAC1 | Class I HDAC used as a reference enzyme in substrate-specificity assays | Provides contrast for enzymes with acetylputrescine deacetylase activity |
| HDAC2 | Class I HDAC used in deacetylation assays | Reference for substrate preference comparisons |
| HDAC3 | Class I HDAC with distinct substrate profile | Comparative tool for HDAC family specificity |
| HDAC8 | HDAC superfamily member with different substrate preference | Contributes to understanding of substrate discrimination |
| SIRT1 | Sirtuin deacetylase used in comparative studies | Shows that deacetylase families differ in substrate range |
| SIRT2 | Sirtuin deacetylase with distinct substrate specificity | Reference for non-HDAC deacetylases |
| P. aeruginosa acetylpolyamine amidohydrolase | Bacterial enzyme with acetylpolyamine deacetylase activity | Model for microbial polyamine catabolism and enzyme specificity |
| Ascaris suum putrescine acetylating enzyme | Nematode enzyme that acetylates putrescine, opposing deacetylation | Comparative model for polyamine acetylation/deacetylation balance |
| ODC1 | Ornithine decarboxylase, produces putrescine upstream of acetylation/deacetylation | Context gene for polyamine pool studies |
| SAT1 | Spermidine/spermine N1-acetyltransferase, generates acetylated polyamines | Upstream enzyme that supplies substrates for deacetylation |
| PAOX | Polyamine oxidase, acts on acetylated polyamines | Downstream enzyme in polyamine catabolism |
| SMOX | Spermine oxidase, contributes to polyamine catabolism | Context for polyamine flux studies |
| AZIN1 | Antizyme inhibitor, regulates polyamine synthesis | Modifier of polyamine pool dynamics |
| OAZ1 | Antizyme, negative regulator of polyamine synthesis | Regulatory node in polyamine homeostasis |
How Is acetylputrescine deacetylase activity Regulated?
The activity described by GO:0047609 is regulated at multiple levels. Substrate availability is a major determinant, because the enzyme requires N-acetylputrescine generated by polyamine acetyltransferases such as SAT1. HDAC10 activity can be modulated by selective inhibitors that occupy the active site and block deacetylation of acetylpolyamines. Structural and biochemical studies show that the active-site architecture and metal coordination of HDAC10 constrain which substrates can be hydrolyzed, providing a form of intrinsic specificity regulation. In bacteria, acetylpolyamine amidohydrolase expression and activity are linked to polyamine availability and catabolic needs. Comparative studies of HDAC superfamily members further show that substrate specificity is a regulated property that differs across enzymes.
acetylputrescine deacetylase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| HDAC10 | Cancer and polyamine-dependent proliferation | HDAC10 knockout and point-mutation cell lines with acetylputrescine deacetylation assays |
| HDAC10 | Substrate-specific inhibitor development | Knock-in of catalytic mutants and inhibitor engagement assays |
| P. aeruginosa acetylpolyamine amidohydrolase | Microbial polyamine catabolism | Bacterial knockout and substrate-specificity assays |
| SAT1 | Polyamine flux and acetylated polyamine supply | Overexpression and knockout models with metabolomics |
| Ascaris suum putrescine acetylating enzyme | Nematode polyamine balance | Heterologous expression and enzymatic assays |
Cancer and polyamine metabolism
Polyamines are required for proliferation, and enzymes that control acetylated versus free polyamine pools are relevant to cancer biology. HDAC10, which has acetylputrescine deacetylase activity, has been studied as a target for selective inhibitors with cellular target engagement. Because HDAC10 prefers acetylpolyamines over acetyllysine substrates, its inhibition may affect polyamine flux rather than classical histone acetylation. This makes the activity described by GO:0047609 a potential node in cancers that depend on polyamine metabolism.
Microbial polyamine catabolism and infection
Bacterial acetylpolyamine amidohydrolases contribute to polyamine recycling and catabolism, which can influence growth and survival in host environments. The substrate specificity and function of these enzymes from Pseudomonas aeruginosa have been characterized, providing a basis for understanding how microbes manage polyamine stress. Because polyamines affect bacterial physiology, enzymes with acetylputrescine deacetylase activity may be relevant to microbial adaptation and host-microbe interactions.
Polyamine balance in parasitic nematodes
A novel putrescine-acetylating enzyme from Ascaris suum highlights the importance of polyamine acetylation in nematodes. Although this enzyme catalyzes the opposite reaction, it underscores the need to balance acetylated and free putrescine. Enzymes with acetylputrescine deacetylase activity could counter such acetylation and influence nematode polyamine homeostasis. This comparative context is useful for understanding the evolution of polyamine control mechanisms.
From acetylputrescine deacetylase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is HDAC10 required for cellular acetylputrescine deacetylation? | HDAC10 knockout cell line plus substrate-based deacetylation assay |
| Which active-site residues are essential for catalysis? | Point-mutation knock-in of catalytic residues guided by HDAC10 structures |
| Does a candidate gene product localize to polyamine-rich compartments? | Tagged knock-in with fluorescent or affinity tags |
| Does overexpression of a deacetylase alter polyamine pools? | Overexpression cell model with metabolomic profiling |
| Can selective inhibitors engage the target in cells? | Wild-type and mutant knock-in cells treated with inhibitors |
| Do bacterial enzymes complement eukaryotic deacetylation defects? | Heterologous expression in knockout backgrounds |
How to Study the acetylputrescine deacetylase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Fluorescent deacetylation assay | Enzymatic release of acetate from acetylated polyamine substrates | HDAC10 activity and inhibitor testing |
| X-ray crystallography | Three-dimensional structure of enzyme-substrate complexes | Active-site mapping and mechanism |
| Substrate-specificity profiling | Relative activity against different acetylated substrates | Assigning GO:0047609 to candidate enzymes |
| Metabolomics (LC-MS) | Levels of putrescine and acetylputrescine | Polyamine flux in cells and microbes |
| Site-directed mutagenesis | Effect of active-site mutations on catalysis | Testing catalytic residues |
| Bacterial genetics | Growth and polyamine phenotypes of mutants | Microbial polyamine catabolism |
| Heterologous expression | Activity of enzymes in a new host | Comparative enzyme function |
Enzymatic deacetylation assays
Direct measurement of acetylputrescine deacetylase activity uses substrate-based assays that detect acetate or putrescine release. Fluorescent acetylspermidine deacetylation assays have been developed for HDAC10 and can be adapted to acetylputrescine substrates. Such assays are essential for confirming that a candidate enzyme carries GO:0047609 activity and for testing inhibitors.
Structural biology and substrate binding
X-ray crystallography of HDAC10 has provided snapshots of substrate binding in the active site, revealing how acetylpolyamines are positioned for hydrolysis. These structures help explain substrate specificity and guide mutagenesis of catalytic residues. Structural comparisons across HDAC superfamily members further clarify why some enzymes prefer acetylpolyamines over acetyllysine.
Substrate-specificity profiling
Biochemical profiling with small synthetic substrates can distinguish enzymes with different deacetylation preferences. This approach has been used to show that HDAC superfamily members differ in substrate specificity, which is critical for assigning GO:0047609 to the correct gene product. Bacterial acetylpolyamine amidohydrolases have also been profiled for substrate range.
Metabolomics and polyamine flux analysis
Mass spectrometry-based metabolomics can quantify putrescine, acetylputrescine, and related polyamines in cells and tissues. Such measurements link enzyme activity to changes in polyamine pools and can be combined with CRISPR models. In microbial systems, metabolomics helps define the role of acetylpolyamine amidohydrolases in catabolism.
How CRISPR Can Be Used to Study GO:0047609 acetylputrescine deacetylase activity
Knockout
CRISPR knockout of candidate genes such as HDAC10 can test whether the gene product is required for acetylputrescine deacetylase activity in cells. Loss-of-function clones are compared with wild-type cells using substrate-based assays and metabolomics. This approach helps establish causality between a gene and the GO:0047609 activity.
Point Mutation
Point mutations in catalytic residues identified from HDAC10 structures can be introduced to test their requirement for deacetylation. Such mutants distinguish catalytic activity from scaffolding or interaction functions. They are also useful for validating inhibitor binding sites.
Knock-in
Knock-in of tagged or reporter versions of candidate genes allows localization and interaction studies without altering endogenous regulation. Tagged HDAC10 knock-in cells can be used to monitor substrate engagement and complex formation. Knock-in of disease-associated or catalytic variants can also model altered polyamine metabolism.
Overexpression
Overexpression of candidate deacetylases can amplify the activity and reveal effects on polyamine pools and cell growth. This is useful when baseline activity is low or when testing substrate preference in a cellular context. Overexpression models complement knockout studies by showing sufficiency rather than necessity.
How EDITGENE Supports acetylputrescine deacetylase activity Research
Researchers studying acetylputrescine deacetylase activity-related genes often need to determine whether a candidate gene is causally involved in the reaction, how its catalytic residues work, and whether its manipulation changes polyamine metabolism. EDITGENE provides CRISPR-based cell models and screening services that address these questions with reproducible, publication-ready reagents.
Contact EDITGENE today to design your custom CRISPR model for acetylputrescine deacetylase activity research.
Frequently Asked Questions About acetylputrescine deacetylase activity
What is acetylputrescine deacetylase activity?
It is the enzymatic activity defined by GO:0047609 that catalyzes N-acetylputrescine + H2O = acetate + putrescine, removing an acetyl group from an acetylated polyamine.
What genes are involved in acetylputrescine deacetylase activity?
HDAC10 is the best-characterized human enzyme with this activity, and bacterial acetylpolyamine amidohydrolases also carry it.
What is the GO ID for acetylputrescine deacetylase activity?
The GO ID is GO:0047609, a molecular_function term in the Gene Ontology.
What is the synonym for GO:0047609?
The synonym is N-acetylputrescine acetylhydrolase activity.
How is acetylputrescine deacetylase activity measured?
It can be measured with substrate-based deacetylation assays, including fluorescent assays adapted for acetylpolyamine substrates.
Does HDAC10 deacetylate acetylputrescine?
Yes, HDAC10 has acetylpolyamine deacetylase activity and prefers acetylated polyamines such as acetylputrescine and acetylspermidine.
Why is acetylputrescine deacetylase activity important in cancer?
It influences polyamine pools that support proliferation, and HDAC10 is studied as a drug target with selective inhibitors.
What is the reaction catalyzed by GO:0047609?
The reaction is N-acetylputrescine + H2O = acetate + putrescine, a hydrolysis reaction.
Are there bacterial enzymes with this activity?
Yes, acetylpolyamine amidohydrolases from Pseudomonas aeruginosa have been characterized for substrate specificity and function.
How can CRISPR help study acetylputrescine deacetylase activity?
CRISPR knockout, point mutation, knock-in, and overexpression models can test whether candidate genes are required or sufficient for the activity in cells.
Conclusion
GO:0047609 acetylputrescine deacetylase activity defines a specific polyamine deacetylation reaction that links polyamine metabolism to the broader biology of the histone deacetylase superfamily. HDAC10 and bacterial acetylpolyamine amidohydrolases provide the main experimental models, and substrate-specificity studies have clarified how these enzymes discriminate among acetylated substrates. The activity is relevant to cancer biology, microbial physiology, and comparative polyamine research. CRISPR-based cell models and biochemical assays now make it feasible to test causality and mechanism for candidate genes with this annotation.
References
- 1. Herp D et al.. 2022. First Fluorescent Acetylspermidine Deacetylation Assay for HDAC10 Identifies Selective Inhibitors with Cellular Target Engagement.. Chembiochem 23(14):e202200180 PMID: 35608330
- 2. Herbst-Gervasoni CJ et al.. 2021. X-ray Crystallographic Snapshots of Substrate Binding in the Active Site of Histone Deacetylase 10.. Biochemistry 60(4):303-313 PMID: 33449614
- 3. Krämer A et al.. 2016. Substrate specificity and function of acetylpolyamine amidohydrolases from Pseudomonas aeruginosa.. BMC Biochem 17:4 PMID: 26956223
- 4. Riester D et al.. 2004. Members of the histone deacetylase superfamily differ in substrate specificity towards small synthetic substrates.. Biochem Biophys Res Commun 324(3):1116-23 PMID: 15485670
- 5. Wittich RM et al.. 1989. A novel type of putrescine (diamine)-acetylating enzyme from the nematode Ascaris suum.. Biochem J 260(1):265-9 PMID: 2775189
