GO:0072341 modified amino acid binding: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0072341 (modified amino acid binding) is a molecular function defined as binding to a modified amino acid, with the synonym amino acid derivative binding.
• Modified amino acid binding underlies amino acid sensing, tRNA recognition, ribosome-targeting drug action, and engineered affinity interfaces.
• Amino acid signature elements in proteins enable recognition of modified tRNA, linking this binding function directly to translation fidelity.
• Amino acid analogs of chloramphenicol bind the bacterial ribosome, showing that modified amino acid binding can be pharmacologically exploited.
• Amino acid-immobilized and zirconia-based materials demonstrate selective binding of hemoglobin and antibodies, translating this GO term into biotechnology.
• Aptamer-functionalized nanopores achieve amino acid-specific peptide detection, providing a platform to measure modified amino acid binding events.
Description
GO:0072341, modified amino acid binding, is a molecular function ontology term defined as binding to a modified amino acid, with the synonym amino acid derivative binding. In practical terms, it describes any protein, nucleic acid, or synthetic interface that physically interacts with an amino acid carrying a chemical modification such as methylation, acetylation, phosphorylation, or a non-natural side chain. This function is central to amino acid sensing, translation, and drug recognition, and it is experimentally tractable with modern biochemical and CRISPR-based approaches.
modified amino acid binding At A Glance
| GO ID | GO:0072341 |
|---|---|
| GO term | modified amino acid binding |
| Ontology | molecular_function |
| Synonym | amino acid derivative binding |
| Major function | Binding to a modified amino acid |
| Definition source | QuickGO |
| Related processes | Amino acid sensing, tRNA recognition, ribosome-targeting drug action |
| Representative ligands | Modified amino acids, amino acid analogs, amino acid derivatives |
| Research relevance | Drug discovery, translation, biosensing, affinity materials |
What Is GO:0072341?
In our own words, GO:0072341 describes the selective, non-covalent interaction between a binding partner and a modified amino acid. The modification can be post-translational or synthetic, and the binding event may serve sensing, transport, catalysis, or structural roles. The QuickGO synonym amino acid derivative binding reflects the broad chemical space covered by this term.
Why Is modified amino acid binding Important in Cell Biology?
Modified amino acid binding is important because it connects chemical modifications of amino acids to biological recognition events that control translation, sensing, and drug action. Proteins that recognize modified tRNA rely on amino acid signatures, and amino acid analogs of chloramphenicol bind the bacterial ribosome to inhibit translation. Beyond biology, amino acid-immobilized and zirconia-modified materials exploit this binding mode for selective protein purification and antibody binding, while aptamer-functionalized nanopores enable amino acid-specific peptide detection. Understanding GO:0072341 therefore informs both fundamental biology and applied biotechnology.
• Defines a molecular function central to amino acid sensing and signaling.
• Enables protein recognition of modified tRNA during translation.
• Explains the mechanism of ribosome-targeting amino acid analog antibiotics.
• Supports selective adsorption of hemoglobin using amino acid-immobilized materials.
• Underlies zirconia-based selective antibody binding for diagnostics.
• Provides a basis for amino acid-specific peptide detection with nanopores.
• Links lipid peroxidation and antioxidant responses through amino acid sensing regulators.
• Guides design of amino acid-modified antiviral derivatives.
• Enables stable amino acid attachment via tRNA amino-tailing.
• Offers a target space for CRISPR knockout and knock-in studies of binding proteins.
Molecular Mechanism of modified amino acid binding
Amino acid sensing and recognition
In simple terms: Cells use proteins that can 'taste' modified amino acids to know when nutrients or stress signals are present.
A regulator of amino acid sensing links lipid peroxidation and lipid droplet-dependent antioxidant response, showing that modified amino acid binding participates in stress-responsive signaling. This sensing function allows cells to couple amino acid availability to antioxidant defense and lipid metabolism.
tRNA recognition via amino acid signatures
In simple terms: Proteins can read a molecular 'signature' on tRNA that depends on modified amino acids.
An amino acid signature enables proteins to recognize modified tRNA, demonstrating that sequence-encoded amino acid features mediate binding to modified nucleic acid substrates. tRNA 3'-amino-tailing further supports stable amino acid attachment, reinforcing the link between modified amino acid binding and translation.
Ribosome-targeting amino acid analogs
In simple terms: Drug-like amino acid mimics can bind the ribosome and block protein synthesis.
Binding and action of amino acid analogs of chloramphenicol upon the bacterial ribosome show that modified amino acid binding is a validated antibiotic mechanism. These analogs occupy the peptidyl transferase center and inhibit translation, illustrating the pharmacological relevance of GO:0072341.
Engineered affinity interfaces
In simple terms: Scientists build surfaces that grab specific amino acids or proteins using modified amino acid chemistry.
Amino acid-immobilized copper ion-modified carbon-based adsorbents selectively adsorb bovine hemoglobin, translating modified amino acid binding into separation science. Zirconia modified with ethylenediaminetetra(methylenephosphonic acid) interacts with amino acids to enable selective antibody binding, providing mechanistic insights for affinity materials. Aptamer-functionalized interface nanopores enable amino acid-specific peptide detection, offering a sensing platform for this binding function.
Antiviral and chemical biology applications
In simple terms: Modified amino acids can be built into drug candidates to improve their activity.
Synthesis and anti-SARS-CoV-2 activity of amino acid modified cephalotaxine derivatives demonstrate that modified amino acid binding motifs can be incorporated into antiviral leads. This chemical biology approach expands the therapeutic scope of GO:0072341.
Key Genes Involved in GO:0072341 modified amino acid binding
The following genes and proteins are representative of modified amino acid binding functions across sensing, translation, and biotechnology.
| Gene | Major Role | Research Relevance |
|---|---|---|
| Amino acid sensing regulator (as reported in) | Links amino acid sensing to lipid peroxidation and antioxidant response | CRISPR knockout to test stress signaling |
| tRNA recognition proteins (as reported in) | Recognize modified tRNA via amino acid signatures | Mutagenesis to map binding determinants |
| Ribosomal proteins (as reported in) | Bind amino acid analogs of chloramphenicol | Antibiotic target validation |
| Hemoglobin (as reported in) | Selectively adsorbed by amino acid-immobilized materials | Affinity purification studies |
| Antibodies (as reported in) | Selectively bound by zirconia-modified surfaces | Diagnostic interface development |
| Aptamer targets (as reported in) | Enable amino acid-specific peptide detection | Nanopore sensing assays |
| Cephalotaxine derivatives (as reported in) | Amino acid modified antiviral compounds | Anti-SARS-CoV-2 drug discovery |
| tRNA amino-tailing enzymes (as reported in) | Stabilize amino acid attachment | Translation fidelity studies |
How Is modified amino acid binding Regulated?
Modified amino acid binding is regulated at multiple levels. Amino acid sensing regulators connect this function to lipid peroxidation and antioxidant responses, indicating that cellular redox state can influence binding activity. The availability of modified tRNA substrates and amino acid attachment stability further modulates recognition events. Pharmacological occupancy by amino acid analogs can also regulate ribosome function.
modified amino acid binding and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| Amino acid sensing regulator (as reported in) | Oxidative stress and lipid peroxidation | Knockout cell model with lipid droplet assays |
| Ribosomal protein targets (as reported in) | Bacterial infection | Point-mutation ribosome model |
| tRNA recognition proteins (as reported in) | Translation fidelity disorders | Knock-in of modified tRNA recognition mutants |
| Antiviral targets (as reported in) | SARS-CoV-2 infection | Overexpression of viral entry factors |
| Aptamer targets (as reported in) | Peptide detection and diagnostics | Tagged knock-in for nanopore sensing |
Infectious disease and antiviral therapy
Amino acid modified cephalotaxine derivatives show anti-SARS-CoV-2 activity, linking modified amino acid binding chemistry to antiviral drug development. Ribosome-targeting amino acid analogs of chloramphenicol further demonstrate that this binding function is relevant to antibacterial strategies.
Metabolic and oxidative stress disorders
A regulator of amino acid sensing links lipid peroxidation and lipid droplet-dependent antioxidant response, suggesting that dysregulated modified amino acid binding may contribute to oxidative stress-related pathology.
Translation-related disorders
Amino acid signature-based recognition of modified tRNA is essential for translation, and its disruption could affect protein synthesis fidelity. tRNA 3'-amino-tailing for stable amino acid attachment further highlights translation-related vulnerabilities.
From modified amino acid binding-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does the gene regulate amino acid sensing? | Knockout cell model |
| Does the mutation alter ribosome binding? | Point-mutation model |
| Can modified tRNA recognition be restored? | Knock-in model |
| Can the protein be detected in live cells? | Tagged knock-in model |
| Does overexpression enhance antiviral activity? | Overexpression model |
| Can binding be measured in real time? | Aptamer-functionalized nanopore assay |
How to Study the modified amino acid binding Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Ribosome binding assay | Binding of amino acid analogs to ribosome | Antibiotic mechanism studies |
| Selective adsorption assay | Adsorption of hemoglobin by amino acid-immobilized material | Protein purification |
| Surface plasmon resonance | Real-time binding to zirconia-modified surfaces | Antibody binding studies |
| Nanopore sensing | Amino acid-specific peptide detection | Label-free diagnostics |
| tRNA amino-tailing assay | Stability of amino acid attachment | Translation studies |
| Mutagenesis and binding mapping | Amino acid signature recognition | tRNA recognition studies |
| Antiviral activity assay | Anti-SARS-CoV-2 activity of modified compounds | Drug discovery |
| Lipid peroxidation assay | Antioxidant response linked to amino acid sensing | Stress signaling studies |
Biochemical binding assays
Binding and action of amino acid analogs of chloramphenicol upon the bacterial ribosome can be measured with ribosome-binding assays to quantify modified amino acid binding. Amino acid-immobilized adsorbents provide a complementary format for selective adsorption studies.
Structural and mechanistic studies
Mechanistic insights into selective antibody binding on zirconia modified with ethylenediaminetetra(methylenephosphonic acid) reveal how surface chemistry governs amino acid interactions. Amino acid signature recognition of modified tRNA can be dissected by mutagenesis and structural analysis.
Sensing and detection platforms
Aptamer-functionalized interface nanopores enable amino acid-specific peptide detection, offering a label-free readout for modified amino acid binding events. tRNA 3'-amino-tailing provides a stable attachment strategy for translation-related binding assays.
Chemical biology and drug discovery
Synthesis and anti-SARS-CoV-2 activity of amino acid modified cephalotaxine derivatives illustrate how modified amino acid binding can be exploited in medicinal chemistry. Amino acid sensing regulators can be studied with lipid peroxidation and antioxidant response readouts.
How CRISPR Can Be Used to Study GO:0072341 modified amino acid binding
Knockout
CRISPR knockout of amino acid sensing regulators can test whether modified amino acid binding is required for lipid peroxidation and antioxidant responses. Knockout of ribosomal protein targets can validate amino acid analog binding sites.
Point Mutation
Point mutations in tRNA recognition proteins can dissect the amino acid signature that enables modified tRNA binding. Point mutations in ribosomal targets can reveal residues critical for amino acid analog binding.
Knock-in
Knock-in of tagged binding proteins enables live-cell detection of modified amino acid binding events. Knock-in of modified tRNA recognition motifs can restore or alter translation fidelity.
Overexpression
Overexpression of amino acid modified antiviral targets can enhance anti-SARS-CoV-2 activity screens. Overexpression of sensing regulators can amplify antioxidant response readouts.
How EDITGENE Supports modified amino acid binding Research
Researchers studying modified amino acid binding-related genes often need to determine whether a candidate gene is causally involved in sensing, translation, or drug response. EDITGENE provides publication-ready CRISPR cell models and screening services to test these hypotheses rigorously.
Contact EDITGENE today to design your custom CRISPR model for modified amino acid binding research.
Frequently Asked Questions About modified amino acid binding
What is GO:0072341?
GO:0072341 is the Gene Ontology molecular function term for modified amino acid binding, defined as binding to a modified amino acid, with the synonym amino acid derivative binding.
What is modified amino acid binding?
It is the selective interaction between a protein or interface and an amino acid carrying a chemical modification, such as methylation or a non-natural side chain.
What genes are involved in modified amino acid binding?
Representative genes include amino acid sensing regulators, tRNA recognition proteins, ribosomal protein targets, and engineered affinity proteins.
Why is modified amino acid binding important?
It controls amino acid sensing, translation, and drug action, and it enables biotechnology applications such as selective protein purification and peptide detection.
How is modified amino acid binding studied?
Common methods include ribosome binding assays, selective adsorption assays, surface plasmon resonance, nanopore sensing, and tRNA amino-tailing assays.
What diseases are linked to modified amino acid binding?
It is linked to infectious disease through antiviral and antibacterial mechanisms, and to oxidative stress-related pathology through amino acid sensing.
Can CRISPR be used to study modified amino acid binding?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models can test the causal role of binding proteins.
What is the synonym for GO:0072341?
The synonym is amino acid derivative binding.
Which ontology aspect does GO:0072341 belong to?
It belongs to the molecular_function aspect of the Gene Ontology.
How does modified amino acid binding relate to translation?
Amino acid signatures enable proteins to recognize modified tRNA, and tRNA amino-tailing stabilizes amino acid attachment, both essential for translation.
Conclusion
GO:0072341 modified amino acid binding is a molecular function that bridges chemical modification of amino acids to biological recognition, with roles in amino acid sensing, tRNA recognition, ribosome-targeting drug action, and engineered affinity interfaces. Researchers can now dissect this function with CRISPR knockout, point mutation, knock-in, and overexpression models, supported by biochemical and sensing assays.
References
- 1. Li J et al.. 2025. A regulator of amino acid sensing links lipid peroxidation and lipid droplet-dependent antioxidant response.. Mol Cell 85(17):3225-3240.e10 PMID: 40865521
- 2. Chen X et al.. 2022. Amino acid-immobilized copper ion-modified carbon-based adsorbent for selective adsorption of bovine hemoglobin.. J Chromatogr A 1680:463440 PMID: 36037577
- 3. Si M et al.. 2024. Synthesis and anti-SARS-CoV-2 activity of amino acid modified cephalotaxine derivatives.. Chem Biol Drug Des 103(6):e14566 PMID: 38858134
- 4. Spears JL et al.. 2014. Amino acid signature enables proteins to recognize modified tRNA.. Biochemistry 53(7):1125-33 PMID: 24483944
- 5. Tereshchenkov AG et al.. 2018. Binding and Action of Amino Acid Analogs of Chloramphenicol upon the Bacterial Ribosome.. J Mol Biol 430(6):842-852 PMID: 29410130
- 6. Hirano A et al.. 2021. Interactions between Amino Acids and Zirconia Modified with Ethylenediaminetetra(methylenephosphonic acid): Mechanistic Insights into the Selective Binding of Antibodies.. Langmuir 37(4):1605-1612 PMID: 33478221
- 7. Gamper H et al.. 2018. tRNA 3'-amino-tailing for stable amino acid attachment.. RNA 24(12):1878-1885 PMID: 30217865
- 8. Schlotter T et al.. 2024. Aptamer-Functionalized Interface Nanopores Enable Amino Acid-Specific Peptide Detection.. ACS Nano 18(8):6286-6297 PMID: 38355286
