GO:0016788 hydrolase activity, acting on ester bonds: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0016788 (hydrolase activity, acting on ester bonds) is a molecular function term defined as catalysis of the hydrolysis of any ester bond, with the synonym esterase activity.
• Enzymes in this class include serine carboxypeptidase-like acyltransferases, amino acid ester hydrolases, phospholipases, and carboxylesterases.
• These enzymes participate in diverse biological processes such as xenobiotic detoxification, lipid metabolism, and plant defense signaling.
• Dysregulation of ester-bond hydrolases is linked to metabolic disorders, cancer, and inflammatory conditions.
• CRISPR-based knockout, point mutation, knock-in, and overexpression models enable causal interrogation of esterase function.
• High-throughput screening and bioinformatics can identify novel esterase substrates and inhibitors for therapeutic development.
Description
GO:0016788, hydrolase activity, acting on ester bonds, is a molecular function term that describes the catalysis of ester bond hydrolysis. This activity is fundamental to numerous biological processes, including the breakdown of lipids, detoxification of xenobiotics, and post-translational modification of proteins. Researchers study this term to understand enzyme mechanisms, substrate specificity, and roles in health and disease. The term encompasses a wide range of enzymes, from serine hydrolases to phospholipases, each with distinct structural features but a shared catalytic strategy. Understanding GO:0016788 is critical for drug discovery, as esterases are often targets for inhibitors or prodrug activation. Moreover, plant and microbial esterases contribute to defense and symbiosis, highlighting their ecological importance.
hydrolase activity, acting on ester bonds At A Glance
| GO ID | GO:0016788 |
|---|---|
| GO term | hydrolase activity, acting on ester bonds |
| Ontology | molecular_function |
| Synonym | esterase activity |
| Major function | Catalysis of the hydrolysis of any ester bond |
| Enzyme classes | Serine hydrolases, phospholipases, carboxylesterases, acyltransferases |
| Representative genes | SCPL, CES2A, PLA1, S9 peptidase |
| Associated processes | Lipid metabolism, xenobiotic detoxification, plant defense |
| Research methods | CRISPR knockout, point mutation, knock-in, overexpression, enzyme assays |
What Is GO:0016788?
In simple terms, GO:0016788 describes enzymes that cut ester bonds by adding water. The official definition is catalysis of the hydrolysis of any ester bond, and the synonym is esterase activity. This activity is essential for breaking down esters into alcohols and acids, a reaction that occurs in many metabolic and signaling pathways.
Why Is hydrolase activity, acting on ester bonds Important in Cell Biology?
GO:0016788 is important because ester-bond hydrolases are involved in fundamental biological processes ranging from lipid digestion to plant immunity, and their dysfunction is associated with diseases such as obesity, cancer, and neurological disorders. These enzymes also serve as drug targets and biocatalysts in industrial applications.
• Esterases are key to lipid metabolism and energy homeostasis.
• They detoxify xenobiotics and drugs, influencing pharmacokinetics.
• Plant esterases contribute to defense against pathogens and nematodes.
• Serine carboxypeptidase-like acyltransferases are involved in plant secondary metabolism.
• Amino acid ester hydrolases are used in industrial synthesis of peptides.
• Phospholipases regulate membrane remodeling and signaling.
• Carboxylesterases activate prodrugs in cancer therapy.
• Dysregulation of esterases is linked to metabolic syndrome and inflammation.
• They are potential targets for insecticides and herbicides.
• CRISPR screens can identify essential esterases in disease models.
Molecular Mechanism of hydrolase activity, acting on ester bonds
Substrate Binding and Active Site Architecture
In simple terms: The enzyme grabs the ester molecule in a pocket called the active site.
Ester-bond hydrolases typically possess a catalytic triad (Ser-His-Asp) or a Ser-His dyad that positions the substrate for hydrolysis. For example, serine carboxypeptidase-like acyltransferases use a Ser-His-Asp triad to catalyze acyl transfer from an ester donor to an acceptor. In Pseudomonas serine peptidase, the active site serine attacks the ester bond of amino acid esters.
Catalytic Mechanism of Ester Hydrolysis
In simple terms: Water is used to split the ester bond into an acid and an alcohol.
The catalytic serine acts as a nucleophile, forming an acyl-enzyme intermediate, which is then hydrolyzed by water to release the product. This mechanism is conserved across many esterases, including carboxylesterases and phospholipases. The reaction proceeds via a tetrahedral transition state stabilized by the oxyanion hole.
Cofactors and Metal Dependence
In simple terms: Some esterases need metal ions to work.
While many serine hydrolases are metal-independent, some phospholipases require calcium ions for substrate binding and catalysis. For instance, heparin low-affinity phospholipase A1 from brain and testicular tissue shows calcium-dependent activity. Other esterases may utilize zinc or magnesium, but this varies by family.
Regulation of Esterase Activity
In simple terms: The activity of these enzymes can be turned on or off by inhibitors or cellular signals.
Esterase activity is regulated at multiple levels, including transcriptional control, post-translational modifications, and endogenous inhibitors. For example, hCES2A is inhibited by berberine analogues, which can modulate drug metabolism. In plants, esterase expression is induced upon nematode infection as part of defense priming.
Substrate Specificity and Diversity
In simple terms: Different esterases prefer different ester molecules.
The substrate specificity of ester-bond hydrolases is determined by the size and shape of the active site pocket. Some enzymes, like amino acid ester hydrolases, are specific for amino acid esters, while phospholipases target phospholipids. This diversity allows them to participate in a wide range of metabolic pathways.
Key Genes Involved in GO:0016788 hydrolase activity, acting on ester bonds
The following genes and proteins represent key examples of hydrolase activity, acting on ester bonds, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| SCPL | Serine carboxypeptidase-like acyltransferase | Plant secondary metabolism and defense |
| CES2A | Carboxylesterase 2A | Drug metabolism and prodrug activation |
| PLA1 | Phospholipase A1 | Membrane remodeling and signaling |
| S9 peptidase | Amino acid ester hydrolase | Industrial peptide synthesis |
| NAPE-PLD | N-acylphosphatidylethanolamine phospholipase D | Appetite regulation and lipid signaling |
| Prb1 | Paraburkholderia tropica esterase | Plant defense priming against nematodes |
| BAHD | BAHD acyltransferase | Plant volatile ester biosynthesis |
| LIP1 | Lipase 1 | Lipid hydrolysis |
| AADAC | Arylacetamide deacetylase | Xenobiotic metabolism |
| PON1 | Paraoxonase 1 | Antioxidant and detoxification |
| FAAH | Fatty acid amide hydrolase | Endocannabinoid signaling |
| MGLL | Monoacylglycerol lipase | Lipid metabolism |
| APEH | Acylpeptide hydrolase | Protein degradation |
| LYPLA1 | Lysophospholipase 1 | Membrane lipid turnover |
| PPT1 | Palmitoyl-protein thioesterase 1 | Neurodegeneration |
| TGH | Triacylglycerol hydrolase | Lipid storage and mobilization |
| ABHD | Alpha/beta hydrolase domain | Diverse metabolic roles |
How Is hydrolase activity, acting on ester bonds Regulated?
Ester-bond hydrolase activity is regulated by transcriptional induction, post-translational modifications, and endogenous inhibitors. For instance, nematode infection primes the expression of defense-related esterases in tomato. In mammals, carboxylesterase activity can be inhibited by small molecules such as berberine analogues, affecting drug metabolism. Additionally, N-acylphosphatidylethanolamine phospholipase D is regulated by nutritional status and hormones to control appetite.
hydrolase activity, acting on ester bonds and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CES2A | Drug metabolism and cancer chemotherapy | Knockout in cancer cell lines |
| PPT1 | Infantile neuronal ceroid lipofuscinosis | Patient-derived iPSCs with point mutation |
| NAPE-PLD | Obesity and appetite regulation | Knockout mouse models |
| PLA1 | Membrane remodeling and inflammation | Overexpression in HEK293 cells |
| SCPL | Plant secondary metabolism and defense | Knockout in Arabidopsis |
Metabolic Disorders
Esterases involved in lipid metabolism, such as NAPE-PLD and monoacylglycerol lipase, are linked to obesity and metabolic syndrome. Dysregulation of these enzymes can lead to altered energy homeostasis and fat accumulation.
Cancer
Carboxylesterases like CES2A activate prodrugs such as irinotecan, and their expression levels influence chemotherapy efficacy. Inhibitors of CES2A are being explored to modulate drug toxicity.
Neurodegeneration
Palmitoyl-protein thioesterase 1 (PPT1) mutations cause infantile neuronal ceroid lipofuscinosis, a neurodegenerative disorder. This highlights the critical role of esterases in lysosomal function and neuronal survival.
Plant Defense
In tomato, esterase activity is part of the defense response against root-knot nematodes, as shown by transcriptional priming. Understanding these enzymes can lead to engineered resistance.
From hydrolase activity, acting on ester bonds-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of CES2A affect prodrug activation? | CRISPR knockout in HepG2 cells |
| How does a point mutation in PPT1 affect enzyme activity? | Knock-in of mutant PPT1 in iPSCs |
| Can overexpression of PLA1 alter lipid signaling? | Overexpression in HEK293 cells |
| What is the role of SCPL in plant defense? | Knockout in tomato |
| Does NAPE-PLD regulate food intake? | Knockout mouse |
| Can esterase inhibitors modulate inflammation? | Point mutation in active site of CES2A |
How to Study the hydrolase activity, acting on ester bonds Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Colorimetric esterase assay | Hydrolysis of p-nitrophenyl esters | Kinetic characterization |
| CRISPR knockout screen | Gene essentiality for esterase activity | Identify novel esterases |
| RNA-seq | Transcriptional changes | Defense response in plants |
| Proteomics | Protein expression and modifications | Esterase regulation |
| X-ray crystallography | 3D structure of esterase | Active site analysis |
| Inhibitor profiling | IC50 of small molecules | Drug discovery |
| Phospholipase assay | Release of fatty acids | Membrane remodeling |
| Knock-in mouse | In vivo function of mutant esterase | Disease modeling |
Enzyme Activity Assays
Esterase activity is commonly measured using colorimetric or fluorogenic substrates such as p-nitrophenyl esters. These assays can determine kinetic parameters and inhibitor efficacy.
CRISPR Screening
Genome-wide CRISPR knockout screens can identify genes required for esterase-mediated processes, such as drug resistance or lipid metabolism.
Transcriptomics and Proteomics
RNA-seq and mass spectrometry reveal expression changes and post-translational modifications of esterases under different conditions.
Structural Biology
X-ray crystallography and cryo-EM provide insights into active site architecture and substrate binding of esterases.
How CRISPR Can Be Used to Study GO:0016788 hydrolase activity, acting on ester bonds
Knockout
CRISPR knockout of esterase genes in cell lines or model organisms can reveal loss-of-function phenotypes, such as altered lipid metabolism or drug sensitivity.
Point Mutation
Introducing point mutations in catalytic residues (e.g., serine to alanine) via CRISPR can abolish esterase activity and validate mechanism.
Knock-in
Knock-in of disease-associated mutations, such as in PPT1, allows study of esterase dysfunction in patient-derived cells.
Overexpression
CRISPR activation or cDNA overexpression can increase esterase levels to study gain-of-function effects on signaling and metabolism.
How EDITGENE Supports hydrolase activity, acting on ester bonds Research
Researchers studying hydrolase activity, acting on ester bonds-related genes often need to determine whether a candidate gene is causally involved in a specific pathway or disease. EDITGENE provides comprehensive CRISPR services to accelerate this research.
Contact EDITGENE today to design your custom CRISPR model for hydrolase activity, acting on ester bonds research.
Frequently Asked Questions About hydrolase activity, acting on ester bonds
What is GO:0016788?
GO:0016788 is a Gene Ontology molecular function term for hydrolase activity, acting on ester bonds, also known as esterase activity.
What genes are involved in hydrolase activity, acting on ester bonds?
Key genes include CES2A, PLA1, SCPL, NAPE-PLD, and PPT1, among others.
What diseases are associated with ester-bond hydrolases?
They are linked to metabolic disorders, cancer, neurodegeneration, and plant defense.
How can I study esterase activity in the lab?
Common methods include colorimetric assays, CRISPR knockout, and overexpression models.
What is the mechanism of ester hydrolysis?
A catalytic serine attacks the ester bond, forming an acyl-enzyme intermediate that is hydrolyzed by water.
Are there inhibitors of esterases?
Yes, compounds like berberine analogues inhibit hCES2A and are studied for drug metabolism.
Can CRISPR be used to study esterases?
Absolutely, CRISPR knockout, point mutation, knock-in, and overexpression are widely used.
What is the role of esterases in plants?
Plant esterases contribute to defense against pathogens and nematodes.
How is esterase activity regulated?
Regulation occurs via transcription, post-translational modifications, and endogenous inhibitors.
What model organisms are used for esterase research?
Common models include human cell lines, mouse, Arabidopsis, and tomato.
Conclusion
GO:0016788, hydrolase activity, acting on ester bonds, represents a fundamental enzymatic function with broad biological and clinical relevance. From lipid metabolism to plant immunity, esterases are central to numerous pathways. Advances in CRISPR technology and high-throughput screening are accelerating the discovery of new esterases and their roles in disease. EDITGENE offers a suite of services to support this research, from knockout models to bioinformatics analysis.
References
- 1. Milkowski C et al.. 2004. Serine carboxypeptidase-like acyltransferases.. Phytochemistry 65(5):517-24 PMID: 15003414
- 2. González-Cardona C et al.. 2024. Paraburkholderia tropica Primes a Multilayered Transcriptional Defense Response to the Nematode Meloidogyne spp. in Tomato.. Int J Mol Sci 25(23) PMID: 39684296
- 4. Maki K et al.. 2021. l-tryptophan-histidine synthesis by Pseudomonas serine peptidase, an amino acid ester hydrolase of the peptidase family S9.. Enzyme Microb Technol 147:109785 PMID: 33992407
- 5. Yang Y et al.. 2023. Discovery of seven-membered ring berberine analogues as highly potent and specific hCES2A inhibitors.. Chem Biol Interact 378:110501 PMID: 37080375
- 7. Wellner N et al.. 2011. Studies on the anorectic effect of N-acylphosphatidylethanolamine and phosphatidylethanolamine in mice.. Biochim Biophys Acta 1811(9):508-12 PMID: 21723414
- 8. Uchiyama S et al.. 1999. Characterization of heparin low-affinity phospholipase A1 present in brain and testicular tissue.. J Biochem 125(6):1001-10 PMID: 10348899
