GO:0051391 tRNA acetylation: RNA Modification Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0051391 tRNA acetylation describes the enzymatic addition of an acetyl group (CH3CO-) to tRNA, a conserved post-transcriptional RNA modification.
• NAT10 is the principal eukaryotic acetyltransferase that installs N4-acetylcytidine (ac4C) on tRNA and other RNA substrates.
• Bacterial toxins such as TacT from Salmonella Typhimurium acetylate the aminoacyl moiety of charged tRNAs to block translation.
• tRNA acetylation influences translation efficiency and tRNA quality control in mammalian cells.
• Dysregulated tRNA acetylation and NAT10 activity are linked to tumor development and progression.
• CRISPR knockout, point-mutation, knock-in and overexpression models enable causal dissection of tRNA acetylation genes.
Description
tRNA acetylation (GO:0051391) is a biological process in which an acetyl group, CH3CO-, derived from acetic acid, is covalently added to a tRNA molecule. This modification expands the chemical and regulatory repertoire of tRNA beyond its canonical role in decoding mRNA, and it is now recognized as a dynamic and reversible layer of epitranscriptomic control. The process is catalyzed by dedicated acetyltransferases, most prominently NAT10 in eukaryotes, which deposits N4-acetylcytidine (ac4C) on tRNA and other RNA species. In bacteria, secreted effector proteins such as TacT from Salmonella Typhimurium acetylate the aminoacyl moiety of charged tRNAs, providing a striking example of how acetylation can be weaponized to inhibit host translation. Because tRNA acetylation directly affects translation efficiency and tRNA quality control, it sits at the intersection of protein synthesis, cellular stress responses and disease. Researchers study GO:0051391 to understand how cells balance translational fidelity with metabolic and environmental inputs, and to identify therapeutic vulnerabilities in cancer and other disorders. The availability of CRISPR-based models for NAT10 and related genes has accelerated functional dissection of this pathway.
tRNA acetylation At A Glance
| GO ID | GO:0051391 |
|---|---|
| GO term | tRNA acetylation |
| Ontology | biological_process |
| Synonym | none |
| Major function | Addition of an acetyl group to tRNA, influencing translation efficiency and tRNA quality control |
| Representative enzyme | NAT10 acetyltransferase in eukaryotes |
| Representative modification | N4-acetylcytidine (ac4C) on tRNA |
| Bacterial example | TacT from Salmonella Typhimurium acetylates glycyl-tRNA(Gly) |
| Disease relevance | Linked to tumor development and progression |
What Is GO:0051391?
According to the Gene Ontology, GO:0051391 tRNA acetylation is defined as the modification of tRNA structure by addition of an acetyl group to tRNA, where an acetyl group is CH3CO-, derived from acetic [ethanoic] acid. In practical terms, this process encompasses enzymatic reactions that transfer an acetyl moiety from a donor such as acetyl-coenzyme A to a tRNA substrate, producing an acetylated tRNA species. The modification can occur on the RNA base, as in N4-acetylcytidine (ac4C), or on the aminoacyl moiety of a charged tRNA, as exemplified by TacT-mediated acetylation. tRNA acetylation is therefore a post-transcriptional modification that alters tRNA chemistry and function without changing the tRNA sequence.
Why Is tRNA acetylation Important in Cell Biology?
tRNA acetylation is important because it directly modulates the core machinery of protein synthesis and provides a regulatory layer that connects cellular metabolism, stress and disease. In mammalian cells, acetylation of tRNA determines translation efficiency and participates in tRNA quality control, meaning that changes in this process can reshape the proteome. NAT10-mediated ac4C modification has emerged as a key driver in tumor development and progression, making the enzymes and readers of tRNA acetylation attractive targets for cancer research. In infection biology, bacterial effectors such as TacT acetylate charged tRNAs to shut down host translation, illustrating the physiological power of this modification. Because aminoacyl-tRNA synthetases themselves can be acetylated in a glucose-sensitive manner, tRNA acetylation is also intertwined with metabolic signaling and lipid synthesis. Together, these findings establish GO:0051391 as a process with broad relevance to translation, oncology and host-pathogen interactions.
• Controls translation efficiency by modifying tRNA chemistry.
• Contributes to tRNA quality control and stability.
• Mediated by NAT10, a druggable acetyltransferase implicated in cancer.
• Provides a bacterial virulence mechanism through TacT-mediated tRNA acetylation.
• Represents a dynamic epitranscriptomic mark detectable by quantitative mapping.
• Connects to metabolic signaling via acetylation of aminoacyl-tRNA synthetases.
• Offers biomarkers and therapeutic targets in tumor development.
• Enables mechanistic studies using CRISPR knockout and knock-in models.
• Links RNA modification to renal fibrosis and other fibrotic pathologies.
• Supports cross-species comparative analysis of RNA acetylation.
What Happens During tRNA acetylation?
Substrate recognition and acetyl-CoA binding
In simple terms: The enzyme first grabs the tRNA and the acetyl donor molecule.
The acetylation reaction begins when the acetyltransferase recognizes its tRNA substrate and binds acetyl-coenzyme A as the acetyl donor. Structural studies of the NAT10 acetyltransferase have revealed how the enzyme engages RNA substrates and positions the acetyl group for transfer, providing a molecular framework for understanding specificity. In bacteria, TacT recognizes charged glycyl-tRNA(Gly) and acetylates the aminoacyl moiety, demonstrating that substrate recognition can target either the RNA base or the amino acid. Quantitative cross-evolutionary mapping has shown that RNA acetylation sites are widespread and dynamically regulated, implying that substrate selection is tightly controlled.
Catalytic transfer of the acetyl group
In simple terms: The enzyme attaches the acetyl group onto the tRNA.
During catalysis, the acetyl moiety is transferred from acetyl-CoA to a nucleophilic position on the tRNA, generating an acetylated tRNA species. In eukaryotic systems, NAT10 catalyzes the formation of N4-acetylcytidine (ac4C) on tRNA and other RNA substrates, a modification that has been structurally and biochemically characterized. The bacterial effector TacT instead acetylates the alpha-amino group of the aminoacyl moiety on glycyl-tRNA(Gly), which prevents the charged tRNA from participating in translation. These distinct chemistries illustrate the versatility of acetyl transfer onto tRNA.
Impact on translation efficiency
In simple terms: The modified tRNA changes how well proteins are made.
Acetylation alters tRNA function and thereby influences translation efficiency. Mammalian studies have shown that tRNA acetylation determines translation efficiency and is coupled to tRNA quality control, meaning that loss or gain of this modification can shift the translational output of the cell. Because ac4C is deposited by NAT10 on tRNA, changes in NAT10 activity can reprogram which mRNAs are efficiently translated. This positions tRNA acetylation as a checkpoint that links RNA modification status to protein synthesis.
Quality control and turnover
In simple terms: The cell checks the modified tRNA and removes damaged molecules.
Acetylation participates in tRNA quality control pathways that monitor tRNA integrity and trigger turnover of defective species. Quantitative mapping studies have revealed dynamic changes in RNA acetylation across conditions, suggesting that the mark is not static but responds to cellular state. When quality control fails, aberrant tRNAs can accumulate and compromise translation, a scenario relevant to disease. The interplay between acetylation and quality control therefore helps maintain proteome fidelity.
Integration with aminoacyl-tRNA synthetase acetylation
In simple terms: The enzymes that charge tRNAs can themselves be acetylated.
tRNA acetylation is functionally connected to acetylation of aminoacyl-tRNA synthetases, the enzymes that attach amino acids to tRNAs. Glucose-sensitive acetylation of seryl-tRNA synthetase regulates lipid synthesis in breast cancer, showing that acetylation of the charging machinery has metabolic consequences. Site-specific studies have further mapped lysine acetylation on aminoacyl-tRNA synthetases, providing a toolkit for dissecting how these modifications affect tRNA charging. Together, these layers of acetylation coordinate tRNA function with metabolic state.
Key Genes Involved in GO:0051391 tRNA acetylation
The following genes and proteins are experimentally implicated in tRNA acetylation and its downstream biology.
| Gene | Major Role | Research Relevance |
|---|---|---|
| NAT10 | Eukaryotic acetyltransferase that deposits ac4C on tRNA and other RNAs | Central enzyme for studying tRNA acetylation and cancer |
| TacT | Salmonella Typhimurium effector that acetylates glycyl-tRNA(Gly) | Model for bacterial inhibition of host translation |
| SARS1 | Seryl-tRNA synthetase subject to glucose-sensitive acetylation | Links tRNA charging acetylation to lipid synthesis in breast cancer |
| DUSP1 | Acetylation-regulated phosphatase implicated in renal fibrosis | Connects acetylation biology to fibrotic disease |
| GARS | Glycyl-tRNA synthetase, substrate context for TacT | Bacterial tRNA acetylation target |
| AARS1 | Aminoacyl-tRNA synthetase with mapped lysine acetylation | Site-specific acetylation studies |
| KARS1 | Aminoacyl-tRNA synthetase with mapped lysine acetylation | Site-specific acetylation studies |
| LARS1 | Aminoacyl-tRNA synthetase with mapped lysine acetylation | Site-specific acetylation studies |
| MARS1 | Aminoacyl-tRNA synthetase with mapped lysine acetylation | Site-specific acetylation studies |
| IARS1 | Aminoacyl-tRNA synthetase with mapped lysine acetylation | Site-specific acetylation studies |
| EPRS1 | Aminoacyl-tRNA synthetase with mapped lysine acetylation | Site-specific acetylation studies |
| RARS1 | Aminoacyl-tRNA synthetase with mapped lysine acetylation | Site-specific acetylation studies |
| VARS1 | Aminoacyl-tRNA synthetase with mapped lysine acetylation | Site-specific acetylation studies |
| WARS1 | Aminoacyl-tRNA synthetase with mapped lysine acetylation | Site-specific acetylation studies |
| YARS1 | Aminoacyl-tRNA synthetase with mapped lysine acetylation | Site-specific acetylation studies |
| TARS1 | Aminoacyl-tRNA synthetase with mapped lysine acetylation | Site-specific acetylation studies |
How Is tRNA acetylation Regulated?
tRNA acetylation is regulated at multiple levels. The availability and activity of NAT10 determine the extent of ac4C deposition on tRNA, and structural studies have begun to reveal how the enzyme is organized for catalysis. Metabolic cues influence acetylation of the tRNA charging machinery; for example, glucose-sensitive acetylation of seryl-tRNA synthetase regulates lipid synthesis in breast cancer, indicating that nutrient status can reshape acetylation events connected to tRNA biology. Site-specific mapping of lysine acetylation on aminoacyl-tRNA synthetases provides a framework for understanding how these regulatory marks are distributed and potentially reversed. In bacterial infection, the delivery of effector proteins such as TacT introduces an external layer of regulation that acetylates host or bacterial tRNAs. Finally, acetylation-regulated DUSP1 deficiency in renal fibrosis illustrates how acetylation-dependent signaling can drive pathological gene expression programs.
tRNA acetylation and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| NAT10 | Tumor development and progression | Cancer cell line knockout and overexpression |
| DUSP1 | Renal fibrosis | Kidney fibrosis models with acetylation mutants |
| SARS1 | Breast cancer lipid synthesis | Glucose-sensitive acetylation mutants in breast cancer cells |
| TacT | Bacterial inhibition of translation | Infection models with effector mutants |
| AARS1/KARS1 | Aminoacyl-tRNA synthetase acetylation | Site-specific acetylation knock-in cells |
Cancer and tumor progression
NAT10-mediated ac4C modification plays a significant role in tumor development and progression, making tRNA acetylation a focus of cancer research. Because ac4C on tRNA influences translation efficiency, altered NAT10 activity can preferentially enhance translation of oncogenic programs. Glucose-sensitive acetylation of seryl-tRNA synthetase further links tRNA charging and acetylation to lipid synthesis in breast cancer, highlighting metabolic rewiring. These findings support the exploration of NAT10 and related acetylation machinery as therapeutic targets.
Renal fibrosis
Acetylation-regulated DUSP1 deficiency contributes to renal fibrosis progression, demonstrating that acetylation-dependent control of signaling molecules can drive fibrotic disease. Although this finding centers on DUSP1 rather than tRNA itself, it illustrates the broader pathological reach of acetylation pathways that intersect with tRNA biology. Researchers studying tRNA acetylation can use such models to ask whether NAT10 or aminoacyl-tRNA synthetase acetylation modifies fibrotic responses.
Infection and host-pathogen interactions
The Salmonella Typhimurium effector TacT acetylates glycyl-tRNA(Gly), providing a molecular basis for bacterial manipulation of translation. This mechanism demonstrates how acetylation of tRNA can be used as a virulence strategy to suppress host protein synthesis. Understanding TacT and related effectors informs both infectious disease biology and the design of countermeasures.
Metabolic and translational disorders
Because tRNA acetylation determines translation efficiency and tRNA quality control, defects in this process could contribute to disorders of protein homeostasis. Acetylation of aminoacyl-tRNA synthetases is sensitive to glucose and regulates lipid synthesis, connecting tRNA acetylation biology to metabolic disease. Quantitative mapping of RNA acetylation across species provides a foundation for identifying conserved and disease-relevant sites.
From tRNA acetylation-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does NAT10 loss reduce tRNA acetylation and translation efficiency? | NAT10 knockout cell line |
| Which residues are required for NAT10 catalysis? | Point-mutation knock-in of catalytic residues |
| Does ac4C on tRNA drive oncogenic translation? | NAT10 overexpression and knockout in cancer cells |
| How does TacT acetylate glycyl-tRNA(Gly)? | Bacterial effector point mutants and structural models |
| Is aminoacyl-tRNA synthetase acetylation glucose-sensitive? | Metabolically controlled cell culture with acetylation mutants |
| Can acetylation mapping identify new tRNA sites? | Quantitative cross-evolutionary mapping in wild-type and mutant cells |
How to Study the tRNA acetylation Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Quantitative RNA acetylation mapping | Global acetylation sites on RNA including tRNA | Discovering and comparing ac4C sites across conditions |
| Ribosome profiling | Translation efficiency and ribosome occupancy | Testing how tRNA acetylation affects protein synthesis |
| Polysome analysis | Distribution of mRNAs across polysomes | Linking acetylation to translational output |
| Structural biology (cryo-EM/crystallography) | Enzyme-tRNA architecture | Understanding catalytic mechanism |
| In vitro acetyltransferase assays | Enzymatic activity and substrate specificity | Validating NAT10 and TacT mutants |
| Site-specific acetylation proteomics | Lysine acetylation on synthetases | Mapping regulatory acetylation sites |
| Metabolic perturbation assays | Glucose-sensitive acetylation changes | Connecting metabolism to tRNA charging |
| CRISPR screening | Genes required for acetylation or translation phenotypes | Identifying modifiers of tRNA acetylation |
Quantitative RNA acetylation mapping
Quantitative cross-evolutionary mapping enables detection of RNA acetylation sites, including ac4C on tRNA, across species and conditions. This approach provides a global view of which tRNAs are acetylated and how the pattern changes with genetic or environmental perturbation. It is a foundational method for validating candidate acetylation events identified by CRISPR screens.
Ribosome profiling and translation assays
Because tRNA acetylation determines translation efficiency, ribosome profiling and polysome analysis can measure how loss or gain of acetylation shifts translational output. Combining these assays with NAT10 perturbation reveals codon-specific or transcript-specific effects. Such experiments connect the molecular mark to functional protein synthesis.
Structural and biochemical characterization
Structural studies of NAT10 and TacT have elucidated how acetyltransferases recognize tRNA and catalyze acetyl transfer. Biochemical assays with purified enzymes and tRNA substrates allow measurement of catalytic activity and substrate specificity. These methods are essential for interpreting disease-associated mutations.
Proteomics of acetylation
Site-specific proteomics has been used to map lysine acetylation on aminoacyl-tRNA synthetases, revealing how the charging machinery is modified. Such datasets help identify crosstalk between tRNA acetylation and the enzymes that charge tRNA. Proteomic profiling can be paired with CRISPR models to test the function of individual acetylation sites.
How CRISPR Can Be Used to Study GO:0051391 tRNA acetylation
Knockout
CRISPR knockout of NAT10 or related acetylation genes is used to test whether tRNA acetylation is required for translation efficiency and quality control. Knockout cells can be profiled by quantitative acetylation mapping and ribosome profiling to define loss-of-function phenotypes. Such models are essential for establishing causality in cancer and metabolic contexts.
Point Mutation
Point-mutation knock-in of catalytic residues in NAT10 or TacT allows separation of enzymatic activity from scaffolding functions. These models are particularly valuable for testing disease-associated or mechanism-specific residues identified by structural studies. Site-specific acetylation mutants of aminoacyl-tRNA synthetases can similarly probe the function of individual lysine residues.
Knock-in
Knock-in of tagged or reporter alleles enables tracking of NAT10 expression, localization and interaction partners in native chromatin context. Tagged knock-in models facilitate immunoprecipitation and mapping of acetylation targets. They also support live-cell imaging of the acetylation machinery.
Overexpression
Overexpression of NAT10 or bacterial effectors such as TacT is used to drive supraphysiological tRNA acetylation and reveal downstream consequences. Overexpression models can uncover oncogenic translation programs and metabolic rewiring. They complement knockout studies by providing gain-of-function evidence.
How EDITGENE Supports tRNA acetylation Research
Researchers studying tRNA acetylation-related genes often need to determine whether a candidate gene is causally involved in the process, which residues or domains are required, and how the modification reshapes translation and disease phenotypes. EDITGENE provides CRISPR-based cell model services that enable these causal experiments in a reproducible and publication-ready format.
Contact EDITGENE today to design your custom CRISPR model for tRNA acetylation research.
Frequently Asked Questions About tRNA acetylation
What is tRNA acetylation?
tRNA acetylation (GO:0051391) is the modification of tRNA structure by addition of an acetyl group (CH3CO-) to tRNA, a process that can influence translation efficiency and tRNA quality control.
What genes are involved in tRNA acetylation?
Key genes include NAT10, the principal eukaryotic acetyltransferase that deposits ac4C on tRNA, and bacterial effectors such as TacT from Salmonella Typhimurium.
Which enzyme catalyzes tRNA acetylation in humans?
NAT10 is the major human acetyltransferase responsible for N4-acetylcytidine (ac4C) modification on tRNA and other RNAs.
How does tRNA acetylation affect translation?
Acetylation of tRNA determines translation efficiency and participates in tRNA quality control, thereby shaping the cellular proteome.
Is tRNA acetylation reversible?
Quantitative cross-evolutionary mapping has shown that RNA acetylation, including ac4C, is dynamic and varies across conditions, indicating that the mark is regulated rather than static.
What diseases are linked to tRNA acetylation?
NAT10-mediated ac4C modification is implicated in tumor development and progression, and acetylation pathways intersect with renal fibrosis and metabolic disease.
How can I study tRNA acetylation with CRISPR?
CRISPR knockout, point-mutation, knock-in and overexpression models of NAT10 and related genes allow causal testing of tRNA acetylation function.
What methods detect tRNA acetylation?
Quantitative RNA acetylation mapping, ribosome profiling, structural biology and site-specific proteomics are commonly used to detect and characterize tRNA acetylation.
Does bacterial infection involve tRNA acetylation?
Yes, the Salmonella Typhimurium effector TacT acetylates glycyl-tRNA(Gly), blocking translation as a virulence mechanism.
Why is NAT10 important in cancer?
NAT10-mediated ac4C modification plays a significant role in tumor development and progression, making it a candidate therapeutic target.
Conclusion
tRNA acetylation (GO:0051391) is a dynamic and functionally important RNA modification that shapes translation efficiency and tRNA quality control. NAT10 is the central eukaryotic enzyme, while bacterial effectors such as TacT demonstrate the process can be exploited during infection. The link between ac4C and tumor progression, together with connections to metabolic and fibrotic disease, positions tRNA acetylation as a high-value research area. CRISPR-based knockout, point-mutation, knock-in and overexpression models provide the causal toolkit needed to move from correlation to mechanism.
References
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- 2. Wang S et al.. 2025. Acetylation-regulated DUSP1 deficiency contributes to renal fibrosis progression.. Theranostics 15(9):3781-3796 PMID: 40213676
- 3. Zhou M et al.. 2026. Structure of the NAT10 acetyltransferase and mechanism of tRNA acetylation.. Nat Commun 17(1) PMID: 42321159
- 4. Yashiro Y et al.. 2021. Molecular basis of glycyl-tRNA(Gly) acetylation by TacT from Salmonella Typhimurium.. Cell Rep 37(12):110130 PMID: 34936863
- 5. Sas-Chen A et al.. 2020. Dynamic RNA acetylation revealed by quantitative cross-evolutionary mapping.. Nature 583(7817):638-643 PMID: 32555463
- 6. Zhao J et al.. 2021. Glucose-sensitive acetylation of Seryl tRNA synthetase regulates lipid synthesis in breast cancer.. Signal Transduct Target Ther 6(1):303 PMID: 34400610
- 7. Chen H et al.. 2019. Site-Specifically Studying Lysine Acetylation of Aminoacyl-tRNA Synthetases.. ACS Chem Biol 14(2):288-295 PMID: 30642164
- 8. Gu Z et al.. 2024. The role and mechanism of NAT10-mediated ac4C modification in tumor development and progression.. MedComm (2020) 5(12):e70026 PMID: 39640362
