GO:0070742 C2H2 zinc finger domain binding: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0070742 (C2H2 zinc finger domain binding) is a molecular function describing the binding of a protein to a C2H2-type zinc finger domain, the classical zinc finger in which two cysteines and two histidines coordinate a zinc ion.
• C2H2 zinc finger proteins constitute one of the largest families of transcription factors in eukaryotes and are classified into three major classes based on their domain architecture.
• The protein-binding potential of C2H2 zinc finger domains extends beyond DNA binding, enabling protein-protein interactions that modulate transcription and chromatin states.
• Non-base-contacting residues in C2H2 zinc fingers enable kaleidoscopic evolution of DNA-binding specificity, which also affects protein interaction surfaces.
• Dysregulation of C2H2 zinc finger proteins is implicated in cancers such as colorectal tumorigenesis, where ZNF280C maintains epigenetic repression at H3K27me3-marked loci.
• CRISPR-based knockout, point mutation, knock-in, and overexpression models are essential to dissect the causal roles of C2H2 zinc finger domain interactions in disease.
Description
C2H2 zinc finger domain binding (GO:0070742) is a molecular function defined as the binding to a C2H2-type zinc finger domain of a protein, where the classical zinc finger domain uses two conserved cysteines and two histidines to coordinate a zinc ion. This function is central to many regulatory processes because C2H2 zinc finger proteins are among the most abundant DNA-binding proteins in eukaryotes and often serve as sequence-specific transcription factors. Beyond DNA recognition, the C2H2 zinc finger domain can mediate protein-protein interactions, allowing these proteins to act as scaffolds or repressors. Researchers study GO:0070742 to understand how protein partners recognize zinc finger domains and how this recognition contributes to gene regulation, development, and disease. The importance of this term is underscored by the evolutionary diversification of C2H2 zinc fingers, where non-base-contacting residues enable altered DNA binding and potentially new protein interaction interfaces. Consequently, GO:0070742 is a key annotation for interpreting protein interaction networks and for designing experiments that test the functional consequences of zinc finger domain binding.
C2H2 zinc finger domain binding At A Glance
| GO ID | GO:0070742 |
|---|---|
| GO term | C2H2 zinc finger domain binding |
| Ontology | molecular_function |
| Synonym | None |
| Major function | Binding to a C2H2-type zinc finger domain of a protein |
| Definition source | QuickGO definition: Binding to a C2H2-type zinc finger domain of a protein; the C2H2 zinc finger is the classical zinc finger domain, in which two conserved cysteines and histidines co-ordinate a zinc ion |
| Related domain | C2H2 zinc finger (classical zinc finger) |
| Taxonomic range | Eukaryotes, including metazoans and plants |
| Example proteins | ZNF280C, KLF15, and other C2H2 zinc finger transcription factors |
What Is GO:0070742?
GO:0070742 describes the binding of a protein or other molecule to a C2H2-type zinc finger domain. The C2H2 zinc finger is the classical zinc finger domain, characterized by two conserved cysteines and two histidines that coordinate a zinc ion, stabilizing a compact fold that can interact with DNA, RNA, or other proteins. This molecular function is distinct from DNA binding itself; it specifically refers to the recognition of the zinc finger domain as a binding target.
Why Is C2H2 zinc finger domain binding Important in Cell Biology?
GO:0070742 is important because C2H2 zinc finger domain binding underlies a vast array of protein-protein interactions that regulate transcription, chromatin remodeling, and development. Many C2H2 zinc finger proteins are transcription factors that control cell fate and proliferation, and their interactions with cofactors or repressors often depend on the zinc finger domain itself. Disruption of these interactions can lead to diseases such as cancer, where ZNF280C contributes to colorectal tumorigenesis by maintaining epigenetic repression at H3K27me3-marked loci. Understanding this binding function also aids in predicting DNA-binding specificity and in engineering zinc finger-based tools. Therefore, GO:0070742 serves as a critical annotation for functional genomics and therapeutic target discovery.
• C2H2 zinc finger proteins are one of the largest transcription factor families, making their domain interactions central to gene regulation.
• The protein-binding potential of C2H2 zinc finger domains enables diverse protein-protein interactions beyond DNA binding.
• Non-base-contacting residues in C2H2 zinc fingers drive evolutionary diversification of binding specificity, affecting both DNA and protein partners.
• ZNF280C, a C2H2 zinc finger protein, promotes colorectal tumorigenesis by maintaining epigenetic repression at H3K27me3-marked loci.
• KLF15, a C2H2 zinc finger transcription factor, is a potential therapeutic target for type 2 diabetes.
• Targeting transcription factors through zinc finger domains offers a strategy for therapeutic intervention.
• Deep learning tools like DeepZF improve DNA-binding prediction for C2H2 zinc finger proteins, aiding functional annotation.
• SCAN domain family members are C2H2 zinc finger transcription factors with distinct protein interaction properties.
• C2H2 zinc finger domain binding is relevant to understanding epigenetic repression and chromatin states.
• CRISPR screens can identify modulators of C2H2 zinc finger domain interactions in disease models.
What Happens During C2H2 zinc finger domain binding?
Recognition of the C2H2 zinc finger domain
In simple terms: A protein recognizes and attaches to the zinc finger part of another protein.
The C2H2 zinc finger domain is a compact fold stabilized by a zinc ion coordinated by two cysteines and two histidines. Binding to this domain (GO:0070742) involves molecular recognition of the domain surface, which can be influenced by non-base-contacting residues that also affect DNA binding. This recognition is the first step in forming a protein complex that may regulate transcription.
Formation of protein-protein complexes
In simple terms: The binding brings proteins together to form a functional complex.
Once a protein binds to a C2H2 zinc finger domain, it can recruit additional factors or stabilize a repressive or activating complex. For example, ZNF280C maintains epigenetic repression at H3K27me3-marked loci, likely through interactions mediated by its zinc finger domain. Such complexes can alter chromatin structure and gene expression.
Modulation of DNA binding and transcription
In simple terms: The interaction can change how the zinc finger protein binds DNA and controls genes.
C2H2 zinc finger proteins often bind DNA in a sequence-specific manner, and protein partners that bind the zinc finger domain can modulate this activity. Non-base-contacting residues enable kaleidoscopic evolution of DNA binding, which may also affect protein interaction surfaces. Thus, GO:0070742 can indirectly influence transcription by altering the availability or conformation of the zinc finger domain.
Downstream effects on chromatin and gene expression
In simple terms: The binding event leads to changes in gene activity and chromatin state.
Binding to C2H2 zinc finger domains can recruit chromatin-modifying enzymes, leading to epigenetic changes such as H3K27me3-mediated repression. This can result in long-term silencing of target genes, as seen in colorectal tumorigenesis. The specificity of these effects depends on the zinc finger protein and its interacting partners.
Key Genes Involved in GO:0070742 C2H2 zinc finger domain binding
The following genes encode proteins that either contain C2H2 zinc finger domains or bind to them, and they are frequently studied in the context of GO:0070742.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ZNF280C | C2H2 zinc finger protein maintaining epigenetic repression at H3K27me3-marked loci | Implicated in colorectal tumorigenesis |
| KLF15 | Krüppel-like factor with C2H2 zinc finger DNA-binding domain | Potential therapeutic target for type 2 diabetes |
| ZNF family members | C2H2 zinc finger transcription factors | Studied for protein-binding potential and DNA binding |
| SCAN domain family | C2H2 zinc finger transcription factors with SCAN domain | Protein interaction and transcriptional regulation |
| C2H2-ZF proteins (general) | Largest family of transcription factors | Classification into three classes based on domain architecture |
| Metazoan C2H2-ZF proteins | DNA-binding proteins with diversified specificity | Evolution of binding via non-base-contacting residues |
| DeepZF targets | C2H2 zinc finger proteins for DNA-binding prediction | Deep transfer learning improves prediction |
| IMiD targets | Transcription factors with zinc finger domains | Targeting through IMiD-independent zinc finger domain |
| ZNF280C partners | Proteins binding to ZNF280C zinc finger domain | Potential modulators of epigenetic repression |
| KLF15 partners | Proteins interacting with KLF15 zinc finger domain | Structural modeling with AlphaFold 3.0 |
| SCAN domain proteins | Zinc finger transcription factors | Family expansion and interaction studies |
| C2H2-ZF DNA-binding models | Predictive models for DNA binding | DeepZF and related tools |
| Zinc finger nucleases | Engineered C2H2 zinc finger domains | Genome editing applications |
| C2H2-ZF repressors | Transcriptional repressors | Epigenetic silencing |
| C2H2-ZF activators | Transcriptional activators | Gene regulation |
| ZNF280C in cancer | Oncogenic zinc finger protein | Colorectal cancer models |
| KLF15 in diabetes | Metabolic transcription factor | Type 2 diabetes models |
How Is C2H2 zinc finger domain binding Regulated?
The binding of proteins to C2H2 zinc finger domains can be regulated by post-translational modifications, availability of zinc, and the presence of competing partners. The SCAN domain family of zinc finger transcription factors can self-associate and regulate each other's activity. Additionally, non-base-contacting residues in the zinc finger domain can influence both DNA and protein binding, providing a layer of evolutionary regulation.
C2H2 zinc finger domain binding and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| ZNF280C | Colorectal tumorigenesis | Knockout and overexpression in colorectal cancer cell lines |
| KLF15 | Type 2 diabetes | Point mutation and knock-in models in metabolic cell lines |
| SCAN domain family | Transcriptional dysregulation | Overexpression and knockout in HEK293 cells |
| C2H2-ZF proteins | Cancer and developmental disorders | CRISPR library screening in disease models |
| ZNF280C partners | Epigenetic repression | Tagged knock-in for interaction studies |
C2H2 zinc finger domain binding in cancer
ZNF280C, a C2H2 zinc finger protein, contributes to colorectal tumorigenesis by maintaining epigenetic repression at H3K27me3-marked loci, highlighting how zinc finger domain interactions can drive oncogenesis. Targeting transcription factors through zinc finger domains has emerged as a therapeutic strategy in cancer.
C2H2 zinc finger domain binding in metabolic disease
KLF15, a C2H2 zinc finger transcription factor, is a potential therapeutic target for type 2 diabetes, and structural modeling of its zinc finger binding domain to DNA provides insights into its function. Protein partners that bind the KLF15 zinc finger domain may modulate its activity in metabolic tissues.
C2H2 zinc finger domain binding in epigenetic regulation
Binding to C2H2 zinc finger domains can recruit chromatin modifiers, leading to changes in histone marks such as H3K27me3. Dysregulation of these interactions can result in aberrant gene silencing, contributing to disease.
From C2H2 zinc finger domain binding-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of ZNF280C affect colorectal tumorigenesis? | ZNF280C knockout in colorectal cancer cell lines |
| Does a point mutation in the C2H2 zinc finger domain disrupt protein binding? | Point mutation knock-in via CRISPR |
| Can a tagged version of KLF15 reveal its interaction partners? | Tagged knock-in of KLF15 |
| Does overexpression of a C2H2 zinc finger protein alter gene expression? | Overexpression cell models |
| Which proteins bind to a specific C2H2 zinc finger domain? | Knock-in of tagged zinc finger domain followed by proteomics |
| Can CRISPR screening identify modulators of zinc finger domain binding? | CRISPR library screening in relevant cell lines |
How to Study the C2H2 zinc finger domain binding Process
| Method | What It Measures | Typical Application |
|---|---|---|
| DeepZF | DNA-binding prediction for C2H2 zinc finger proteins | Functional annotation of zinc finger proteins |
| AlphaFold 3.0 | Structural models of zinc finger-DNA complexes | Understanding binding interfaces |
| Co-immunoprecipitation | Protein-protein interactions with zinc finger domains | Identifying binding partners |
| Proteomics | Global protein interactions | Mapping zinc finger domain interactome |
| CRISPR knockout | Loss-of-function effects | Testing causal roles in disease |
| CRISPR activation | Gain-of-function effects | Overexpression studies |
| ChIP-seq | DNA binding sites of zinc finger proteins | Mapping genomic occupancy |
| RNA-seq | Transcriptional changes | Downstream effects of domain binding |
Deep learning for DNA-binding prediction
DeepZF uses deep transfer learning to improve DNA-binding prediction of C2H2 zinc finger proteins, which can help infer the impact of domain binding on DNA recognition.
Structural modeling
AlphaFold 3.0 has been used to model the KLF15 zinc finger binding domain to DNA, providing structural insights into its interactions.
Protein interaction assays
Co-immunoprecipitation, yeast two-hybrid, and proteomics can identify proteins that bind to C2H2 zinc finger domains, directly assaying GO:0070742.
CRISPR-based functional screens
CRISPR knockout and activation screens can uncover genes that modulate C2H2 zinc finger domain binding and its downstream effects.
How CRISPR Can Be Used to Study GO:0070742 C2H2 zinc finger domain binding
Knockout
CRISPR knockout of C2H2 zinc finger protein genes, such as ZNF280C, can reveal their role in maintaining epigenetic repression and tumorigenesis.
Point Mutation
Introducing point mutations in the C2H2 zinc finger domain can disrupt specific protein interactions while preserving DNA binding, allowing precise dissection of GO:0070742.
Knock-in
Knock-in of tagged zinc finger domains enables affinity purification and identification of binding partners in endogenous contexts.
Overexpression
Overexpression of C2H2 zinc finger proteins can model gain-of-function effects and identify downstream transcriptional changes.
How EDITGENE Supports C2H2 zinc finger domain binding Research
Researchers studying C2H2 zinc finger domain binding-related genes often need to determine whether a candidate gene is causally involved in a specific biological process or disease. EDITGENE provides a comprehensive suite of CRISPR services to enable such functional studies.
Contact EDITGENE today to design your custom CRISPR model for C2H2 zinc finger domain binding research.
Frequently Asked Questions About C2H2 zinc finger domain binding
What is C2H2 zinc finger domain binding?
C2H2 zinc finger domain binding (GO:0070742) is the binding to a C2H2-type zinc finger domain of a protein, where the domain uses two cysteines and two histidines to coordinate a zinc ion.
What genes are involved in C2H2 zinc finger domain binding?
Genes encoding C2H2 zinc finger proteins such as ZNF280C and KLF15, as well as their binding partners, are involved.
What is the function of GO:0070742?
It describes a molecular function where a protein binds to a C2H2 zinc finger domain, often mediating protein-protein interactions that regulate transcription.
How is C2H2 zinc finger domain binding studied?
Methods include co-immunoprecipitation, proteomics, deep learning prediction with DeepZF, and structural modeling with AlphaFold 3.0.
What diseases are associated with C2H2 zinc finger domain binding?
Dysregulation is linked to cancers such as colorectal tumorigenesis and metabolic diseases like type 2 diabetes.
What are the three classes of C2H2 zinc finger proteins?
They are classified into three classes based on their domain architecture and zinc finger composition.
Can CRISPR be used to study C2H2 zinc finger domain binding?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models are used to dissect the function of these domains.
What is the role of non-base-contacting residues in C2H2 zinc fingers?
They enable kaleidoscopic evolution of DNA binding and can also affect protein interaction surfaces.
What is the SCAN domain family?
The SCAN domain family is a group of C2H2 zinc finger transcription factors that can self-associate and regulate transcription.
How does ZNF280C contribute to cancer?
ZNF280C maintains epigenetic repression at H3K27me3-marked loci, contributing to colorectal tumorigenesis.
Conclusion
GO:0070742 (C2H2 zinc finger domain binding) is a fundamental molecular function that mediates protein-protein interactions critical for transcriptional regulation and chromatin organization. Its relevance spans cancer, metabolic disease, and epigenetic control, making it a key area for functional genomics. Leveraging CRISPR models and advanced computational tools will continue to illuminate how C2H2 zinc finger domain interactions shape cellular phenotypes and disease.
References
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- 2. Brayer KJ et al.. 2008. The protein-binding potential of C2H2 zinc finger domains.. Cell Biochem Biophys 51(1):9-19 PMID: 18286240
- 3. Iuchi S. 2001. Three classes of C2H2 zinc finger proteins.. Cell Mol Life Sci 58(4):625-35 PMID: 11361095
- 4. Ying Y et al.. 2022. Zinc finger protein 280C contributes to colorectal tumorigenesis by maintaining epigenetic repression at H3K27me3-marked loci.. Proc Natl Acad Sci U S A 119(22):e2120633119 PMID: 35605119
- 5. Edelstein LC et al.. 2005. The SCAN domain family of zinc finger transcription factors.. Gene 359:1-17 PMID: 16139965
- 6. Mohammad A et al.. 2025. Structural Modelling of Krüppel-Like Factor 15 Zinc Finger Binding Domain to DNA Using AlphaFold 3.0: Potential Therapeutic Target for Type 2 Diabetes.. J Cell Mol Med 29(10):e70565 PMID: 40411314
- 7. Liu BH et al.. 2025. Targeting transcription factors through an IMiD independent zinc finger domain.. EMBO Mol Med 17(6):1393-1416 PMID: 40369156
- 8. Najafabadi HS et al.. 2017. Non-base-contacting residues enable kaleidoscopic evolution of metazoan C2H2 zinc finger DNA binding.. Genome Biol 18(1):167 PMID: 28877740
