GO:0003723 RNA binding: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0003723 RNA binding is a molecular function defined as binding to an RNA molecule or a portion thereof, including sequence-specific and non-specific modes.
• RNA binding is not limited to classical RNA-binding domains; transcription factors, metabolic enzymes such as GAPDH, and oncoproteins such as MYCN can also bind RNA.
• RNA binding underlies diverse processes including transcription regulation, RNA processing and turnover, chromatin silencing, and RNA:DNA hybrid recognition.
• Disease-linked RNA-binding proteins include C9orf72 poly(PR) dipeptides in neurodegeneration and MYCN in cancer.
• CRISPR knockout, point-mutation, knock-in, and overexpression models allow causal testing of RNA-binding residues and domains.
• Methods such as CLIP, RIP-seq, RNA pull-down, and transcriptome-wide binding assays are used to map RNA-protein interactions.
Description
GO:0003723 RNA binding is a molecular function ontology term describing the binding to an RNA molecule or a portion thereof. This function is fundamental to gene expression because RNA molecules must be recognized, folded, transported, translated, or degraded by proteins. The QuickGO definition encompasses both sequence-specific and non-specific RNA binding modes, as illustrated by La proteins that couple sequence-specific and non-specific binding to engage RNA substrates. RNA binding is therefore a central activity in transcription, RNA processing, and translation.
RNA binding At A Glance
| GO ID | GO:0003723 |
|---|---|
| GO term | RNA binding |
| Ontology | molecular_function |
| Synonym | base pairing with RNA; poly(A) RNA binding; poly(A)-RNA binding; poly-A RNA binding |
| Major function | Binding to an RNA molecule or a portion thereof |
| Related processes | Transcription regulation, RNA processing, RNA turnover, chromatin silencing |
| Example proteins | MYCN, GAPDH, La proteins, Periphilin, Nucleobindin 1 |
| Disease relevance | Cancer, neurodegeneration, developmental disorders |
What Is GO:0003723?
In your own words, GO:0003723 RNA binding means the ability of a protein or other molecule to physically interact with an RNA molecule, whether through sequence-specific recognition, shape recognition, or non-specific electrostatic contacts. It includes binding to any RNA species, such as mRNA, non-coding RNA, or viral RNA, and can occur through canonical RNA-binding domains or through non-canonical surfaces.
Why Is RNA binding Important in Cell Biology?
RNA binding is important because it is a prerequisite for nearly all RNA-dependent processes, from transcription and splicing to translation and RNA decay. Disruption of RNA binding can alter gene expression programs and cause disease, as shown for MYCN in cancer and C9orf72 poly(PR) dipeptides in neurodegeneration. Understanding RNA binding therefore provides mechanistic insight into normal biology and disease, and it offers targets for therapeutic intervention.
• RNA binding enables transcription factors to interact with RNA and regulate genes.
• It is required for RNA processing and turnover, including nuclear exosome targeting.
• It contributes to chromatin silencing through proteins such as Periphilin in the HUSH complex.
• Non-canonical RNA-binding proteins such as GAPDH expand the functional repertoire of RNA binding.
• RNA binding to RNA:DNA hybrids is a distinct recognition mode with roles in genome stability.
• Disease-associated RNA-binding proteins include C9orf72 poly(PR) dipeptides in neurodegeneration.
• MYCN acts as an RNA-binding accessory factor, linking RNA binding to oncogenesis.
• La proteins illustrate how sequence-specific and non-specific RNA binding cooperate.
• Nucleobindin 1 combines RNA binding with RNA-melting activity.
• RNA binding is a tractable target for CRISPR-based functional studies.
What Happens During RNA binding?
RNA recognition and initial contact
In simple terms: The protein first finds and touches the RNA.
RNA binding begins with recognition of an RNA molecule or a portion thereof. This can involve sequence-specific contacts or non-specific electrostatic interactions, as described for La proteins that couple sequence-specific and non-specific binding modes to engage RNA substrates. Transcription factors can also interact with RNA to regulate genes, indicating that initial RNA contact can occur in nuclear regulatory contexts.
Sequence-specific versus non-specific binding
In simple terms: Some proteins read the RNA sequence, while others just hold RNA loosely.
RNA-binding proteins can use sequence-specific modes, non-specific modes, or both. La proteins exemplify this dual capability, allowing them to engage diverse RNA substrates. Non-canonical AU-rich RNA binding by GAPDH further shows that RNA binding can occur without classical RNA-binding domains.
RNA binding in transcription regulation
In simple terms: RNA binding can help control which genes are turned on.
Transcription factors interact with RNA to regulate genes, expanding the role of RNA binding beyond post-transcriptional events. This suggests that RNA binding can feed back into transcriptional control and gene expression programs.
RNA binding in RNA processing and turnover
In simple terms: RNA binding helps decide what happens to an RNA molecule.
MYCN is an RNA-binding accessory factor of the nuclear exosome targeting complex, linking RNA binding to RNA processing and turnover. This illustrates how RNA binding can direct RNA fate decisions.
RNA binding in chromatin silencing
In simple terms: RNA binding can help silence parts of the genome.
RNA binding by Periphilin plays an essential role in initiating silencing by the HUSH complex, connecting RNA binding to chromatin regulation. This shows that RNA binding can influence epigenetic states.
RNA binding to RNA:DNA hybrids
In simple terms: Some proteins bind hybrid RNA-DNA structures.
GADD45A binds RNA:DNA hybrids in vitro, demonstrating that RNA binding can target hybrid nucleic acid structures. Nucleobindin 1 also exhibits RNA-binding and RNA-melting activities, further diversifying RNA-binding mechanisms.
Key Genes Involved in GO:0003723 RNA binding
The following genes and proteins represent real examples of RNA-binding activities reported in the literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| MYCN | RNA-binding accessory factor of nuclear exosome targeting complex | Cancer and RNA turnover |
| GAPDH | Non-canonical AU-rich RNA binding | Metabolic enzyme with RNA-binding function |
| C9orf72 | Poly(PR) dipeptides bind RNA transcriptome-wide | Neurodegeneration |
| Periphilin | RNA binding initiates HUSH complex silencing | Chromatin silencing |
| La | Couples sequence-specific and non-specific RNA binding | RNA substrate engagement |
| GADD45A | Binds RNA:DNA hybrids | Genome stability |
| Nucleobindin 1 | RNA binding and RNA melting | Multifunctional RNA-binding protein |
| Transcription factors | Interact with RNA to regulate genes | Gene regulation |
How Is RNA binding Regulated?
RNA binding can be regulated at multiple levels, including post-translational modifications and interaction with cofactors. For example, MYCN functions as an RNA-binding accessory factor of the nuclear exosome targeting complex, indicating that its RNA-binding activity is integrated into a larger regulatory complex. Transcription factors that interact with RNA to regulate genes further suggest that RNA binding is embedded in gene regulatory networks.
RNA binding and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| MYCN | Cancer | Knockout and point-mutation models |
| C9orf72 | Neurodegeneration | Knock-in of poly(PR) dipeptides |
| Periphilin | Chromatin silencing | Knockout and tagged knock-in |
| GAPDH | Metabolic and RNA-binding biology | Overexpression and point mutation |
| GADD45A | Genome stability | In vitro RNA:DNA hybrid binding assays |
RNA binding in cancer
MYCN is an RNA-binding accessory factor of the nuclear exosome targeting complex, linking RNA binding to oncogenic gene expression programs. This connection highlights RNA binding as a potential vulnerability in MYCN-driven cancers.
RNA binding in neurodegeneration
C9orf72 poly(PR) dipeptides exhibit transcriptome-wide RNA binding, providing a mechanistic link between RNA binding and neurodegeneration. This suggests that aberrant RNA binding contributes to disease pathology.
RNA binding in chromatin and developmental disorders
Periphilin RNA binding is essential for initiating silencing by the HUSH complex, which is important for chromatin regulation. Disruption of such RNA-binding functions could affect developmental gene regulation.
From RNA binding-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of RNA binding affect gene expression? | CRISPR knockout of RNA-binding domain |
| Which residues mediate RNA contact? | Point mutation of candidate RNA-binding residues |
| Does a disease variant alter RNA binding? | Knock-in of patient variant |
| Where does the protein bind RNA in cells? | Tagged knock-in for CLIP or RIP |
| Does overexpression mimic disease? | Overexpression cell model |
| Which RNAs are bound transcriptome-wide? | Transcriptome-wide RNA binding analysis |
How to Study the RNA binding Process
| Method | What It Measures | Typical Application |
|---|---|---|
| CLIP | Protein-RNA interactions in cells | Mapping binding sites |
| RIP-seq | RNA targets of a protein | Identifying bound RNAs |
| RNA pull-down | Proteins bound to a specific RNA | Discovering RNA-binding proteins |
| In vitro binding assay | Direct RNA binding | Testing RNA:DNA hybrid binding |
| Mutagenesis | Residues required for RNA binding | Point mutation studies |
| Transcriptome-wide analysis | Global RNA binding landscape | Disease-linked RNA binding |
| Proteomics | Protein composition of RNA complexes | Identifying cofactors |
Transcriptome-wide RNA binding analysis
Transcriptome-wide RNA binding analysis can map RNA targets of proteins such as C9orf72 poly(PR) dipeptides. This approach identifies global RNA interaction landscapes.
In vitro RNA binding assays
In vitro binding assays can test direct RNA binding, as shown for GADD45A binding to RNA:DNA hybrids. These assays help distinguish direct from indirect interactions.
RNA pull-down and proteomics
RNA pull-down combined with proteomics can identify proteins that bind specific RNAs. This is useful for discovering non-canonical RNA-binding proteins such as GAPDH.
Functional perturbation with CRISPR
CRISPR knockout or point mutation can test whether RNA binding is required for a biological process, as illustrated by studies of Periphilin in HUSH complex silencing.
How CRISPR Can Be Used to Study GO:0003723 RNA binding
Knockout
CRISPR knockout can delete an RNA-binding domain or entire gene to test loss of function. For example, knockout of Periphilin can assess its role in HUSH complex silencing.
Point Mutation
Point mutation can disrupt specific RNA-binding residues to separate RNA binding from other functions. This is useful for testing sequence-specific versus non-specific binding modes.
Knock-in
Knock-in can introduce disease-associated variants or tags. For example, knock-in of C9orf72 poly(PR) dipeptides can model neurodegeneration.
Overexpression
Overexpression can test gain of function and mimic disease states. Overexpression of MYCN can model oncogenic RNA-binding activity.
How EDITGENE Supports RNA binding Research
Researchers studying RNA binding-related genes often need to determine whether a candidate gene is causally involved in a biological process or disease. EDITGENE provides CRISPR-based cell models and screening services to test RNA-binding functions with precision.
Contact EDITGENE today to design your custom CRISPR model for RNA binding research.
Frequently Asked Questions About RNA binding
What is GO:0003723 RNA binding?
GO:0003723 RNA binding is a molecular function defined as binding to an RNA molecule or a portion thereof, including sequence-specific and non-specific modes.
What genes are involved in RNA binding?
Examples include MYCN, GAPDH, C9orf72, Periphilin, La, GADD45A, and Nucleobindin 1.
How is RNA binding studied?
Methods include CLIP, RIP-seq, RNA pull-down, in vitro binding assays, and transcriptome-wide RNA binding analysis.
Why is RNA binding important in cancer?
MYCN acts as an RNA-binding accessory factor of the nuclear exosome targeting complex, linking RNA binding to oncogenesis.
Can transcription factors bind RNA?
Yes, transcription factors interact with RNA to regulate genes.
What is non-canonical RNA binding?
Non-canonical RNA binding refers to RNA binding by proteins without classical RNA-binding domains, such as GAPDH.
How does RNA binding relate to neurodegeneration?
C9orf72 poly(PR) dipeptides exhibit transcriptome-wide RNA binding, linking RNA binding to neurodegeneration.
What is the role of RNA binding in chromatin silencing?
RNA binding by Periphilin is essential for initiating silencing by the HUSH complex.
Can proteins bind RNA:DNA hybrids?
Yes, GADD45A binds RNA:DNA hybrids in vitro.
What CRISPR models are used for RNA binding research?
Knockout, point mutation, knock-in, and overexpression models are used to test RNA-binding functions.
Conclusion
GO:0003723 RNA binding is a fundamental molecular function that underpins transcription regulation, RNA processing, chromatin silencing, and disease mechanisms. Real examples such as MYCN, C9orf72, Periphilin, and GAPDH illustrate the diversity of RNA-binding proteins and their roles in cancer and neurodegeneration. CRISPR-based models provide a powerful approach to dissect RNA-binding mechanisms and identify therapeutic targets.
References
- 1. Papadopoulos D et al.. 2024. The MYCN oncoprotein is an RNA-binding accessory factor of the nuclear exosome targeting complex.. Mol Cell 84(11):2070-2086.e20 PMID: 38703770
- 2. Oksuz O et al.. 2023. Transcription factors interact with RNA to regulate genes.. Mol Cell 83(14):2449-2463.e13 PMID: 37402367
- 3. Balendra R et al.. 2023. Transcriptome-wide RNA binding analysis of C9orf72 poly(PR) dipeptides.. Life Sci Alliance 6(9) PMID: 37438085
- 4. Garcin ED. 2019. GAPDH as a model non-canonical AU-rich RNA binding protein.. Semin Cell Dev Biol 86:162-173 PMID: 29574117
- 5. Bloor S et al.. 2025. RNA binding by Periphilin plays an essential role in initiating silencing by the HUSH complex.. Nucleic Acids Res 53(2) PMID: 39658355
- 6. Bayfield MA et al.. 2021. La proteins couple use of sequence-specific and non-specific binding modes to engage RNA substrates.. RNA Biol 18(2):168-177 PMID: 30777481
- 7. Arab K et al.. 2022. In Vitro Binding of GADD45A to RNA:DNA Hybrids.. Methods Mol Biol 2528:277-287 PMID: 35704198
- 8. Mikhaylina A et al.. 2023. The RNA-Binding and RNA-Melting Activities of the Multifunctional Protein Nucleobindin 1.. Int J Mol Sci 24(7) PMID: 37047165
