GO:0001162 RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0001162 describes a molecular function: sequence-specific DNA binding to an intronic regulatory region of an RNA polymerase II transcript, controlling transcription of that same transcript.
• This intronic binding is a key mechanism of negative autoregulation, best exemplified by the YAP gene, where an intronic enhancer-like element recruits a transcriptional repressor complex.
• The term is distinct from promoter or enhancer binding because the regulatory sequence lies within an intron of the transcript it regulates.
• Dysregulation of intronic autoregulation can contribute to cancer and other diseases through altered expression of growth-promoting genes such as YAP.
• CRISPR knockout, point mutation, knock-in, and overexpression models are essential to dissect the causal role of intronic regulatory elements and their binding factors.
• Understanding GO:0001162 helps interpret non-coding variants and design targeted therapies that modulate intronic feedback loops.
Description
GO:0001162, RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding, is a molecular function term that captures a specialized mode of transcriptional control. It refers to the binding of a protein or protein complex to a specific DNA sequence located within an intron of an RNA polymerase II (Pol II) transcript, where that binding event regulates the transcription of the very transcript in which the intron resides. This is mechanistically different from promoter or enhancer binding because the regulatory element is embedded inside the gene it controls, creating a negative or positive feedback loop that can fine-tune gene expression. The best-characterized example is the YAP gene, where an intronic sequence element mediates transcriptional repression in response to Wnt/β-catenin signaling. Researchers study GO:0001162 to understand how cells maintain precise control of growth-promoting genes and how disruption of this control contributes to cancer and other diseases.
RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding At A Glance
| GO ID | GO:0001162 |
|---|---|
| GO term | RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding |
| Ontology | molecular_function |
| Synonym | None |
| Major function | Sequence-specific binding to an intronic DNA regulatory element that controls transcription of the containing Pol II transcript |
| Definition source | QuickGO |
| Example gene | YAP (Yes-associated protein) |
| Related process | Negative autoregulation of transcription |
| Cellular context | Nucleus, chromatin-associated |
What Is GO:0001162?
In simple terms, GO:0001162 is the function of a protein that binds to a specific DNA sequence inside an intron of a gene that is being transcribed by RNA polymerase II. This binding acts like a dimmer switch that can turn down or turn up the transcription of that same gene. The QuickGO definition states: Binding to an RNA polymerase II intronic DNA sequence that regulates the transcription of the transcript it is contained within. This function is sequence-specific, meaning the protein recognizes a particular DNA motif, and it is intronic, meaning the regulatory element is part of the intron rather than the promoter or a distant enhancer.
Why Is RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding Important in Cell Biology?
GO:0001162 is important because it represents a widespread but underappreciated layer of gene regulation: intronic feedback control. Many genes, especially those involved in growth and development, use intronic elements to limit their own expression, preventing excessive signaling. When this function is disrupted, genes like YAP can become overexpressed, driving uncontrolled cell proliferation and contributing to tumorigenesis. Understanding this term therefore has direct implications for cancer biology, developmental disorders, and the interpretation of non-coding genetic variants that fall within introns.
• Provides a mechanistic explanation for negative feedback loops that keep growth-promoting genes in check.
• Helps explain how Wnt/β-catenin signaling represses YAP expression through an intronic element.
• Links non-coding intronic sequences to transcriptional regulation, aiding interpretation of GWAS variants.
• Offers a target for therapeutic intervention in cancers where YAP is overexpressed.
• Guides CRISPR-based dissection of intronic regulatory elements and their binding proteins.
• Supports the development of reporter assays and genome-wide screens for intronic regulators.
• Clarifies the distinction between promoter, enhancer, and intronic regulatory binding.
• Enables functional annotation of the dark matter of the genome, including intronic cis-regulatory modules.
Molecular Mechanism of RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding
Recognition of the intronic DNA motif
In simple terms: A protein finds and attaches to a specific short DNA sequence inside an intron.
The first step in GO:0001162 is the sequence-specific recognition of an intronic DNA element by a DNA-binding protein or complex. This recognition relies on the three-dimensional structure of the protein's DNA-binding domain, which forms hydrogen bonds and van der Waals contacts with bases in the major groove of the DNA helix. The intronic location means the motif is embedded within a transcribed region of an RNA polymerase II gene, distinguishing it from promoter or enhancer elements. In the YAP gene, an intronic element serves as the binding site for a repressor complex that is recruited in a Wnt/β-catenin-dependent manner.
Assembly of the repressor complex
In simple terms: Once the protein binds, it recruits other proteins that together shut down transcription.
After the initial DNA binding event, the protein nucleates the assembly of a larger transcriptional repressor complex. This complex typically includes co-repressors such as histone deacetylases (HDACs) and chromatin remodeling factors that modify the local chromatin environment to make it less accessible to the transcriptional machinery. In the context of YAP, Wnt/β-catenin signaling promotes the formation of a repressor complex on the intronic element, leading to reduced YAP transcription. The exact composition of the complex can vary by gene and cell type, but the core function remains the sequence-specific binding to the intronic regulatory region.
Chromatin modification and transcriptional silencing
In simple terms: The bound complex changes the way DNA is packaged, making it harder for the gene to be read.
The repressor complex recruited to the intronic element catalyzes chromatin modifications, such as histone deacetylation and methylation, that compact the chromatin and reduce accessibility of the promoter to RNA polymerase II. This leads to decreased transcription initiation or elongation of the containing transcript. For YAP, this intronic autoregulation provides a negative feedback mechanism that limits YAP expression even when upstream growth signals are active. The term GO:0001162 specifically covers the DNA-binding step that initiates this cascade, not the downstream chromatin changes themselves.
Integration with signaling pathways
In simple terms: External signals can control whether the intronic switch is on or off.
Intronic regulatory binding is often responsive to extracellular signals. In colorectal carcinoma cells, activation of the Wnt/β-catenin pathway leads to increased binding of a repressor complex to the YAP intronic element, resulting in decreased YAP expression. This integration allows cells to coordinate growth signals with feedback control of downstream effectors. The molecular function GO:0001162 is therefore not constitutive but dynamically regulated by signaling inputs that modify the availability or activity of the DNA-binding protein.
Feedback loop and homeostatic control
In simple terms: The gene's own product helps keep its own production in check.
A key feature of intronic regulatory binding is that it creates a negative feedback loop: the transcript being regulated encodes a protein that, directly or indirectly, influences the binding activity. In the case of YAP, the intronic element mediates repression of YAP transcription in response to Wnt signaling, forming a feedback circuit that prevents excessive YAP accumulation. This homeostatic control is critical for normal tissue growth and is often disrupted in cancer, where loss of intronic repression leads to YAP overexpression.
Key Genes Involved in GO:0001162 RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding
The following genes and proteins are directly or indirectly associated with RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding (GO:0001162), based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| YAP | Contains an intronic regulatory element that mediates transcriptional repression in response to Wnt/β-catenin signaling | Model gene for studying intronic autoregulation and cancer |
| CTNNB1 | Encodes β-catenin, which activates the repressor complex binding to the YAP intronic element | Upstream regulator of GO:0001162 in colorectal cancer |
| TCF7L2 | Transcription factor that partners with β-catenin to regulate target genes including YAP | Potential mediator of intronic regulatory binding |
| HDAC1 | Histone deacetylase recruited to intronic repressor complexes | Chromatin modifier downstream of intronic binding |
| HDAC2 | Histone deacetylase involved in transcriptional repression | Candidate component of intronic repressor complex |
| KAT2A | Histone acetyltransferase that can counteract repression | Potential modulator of intronic regulatory balance |
| EP300 | Transcriptional co-activator with histone acetyltransferase activity | May influence chromatin state at intronic elements |
| CREBBP | Co-activator paralog of EP300 | Potential regulator of intronic element accessibility |
| CTBP1 | Corepressor that can bind to intronic regulatory factors | Candidate mediator of intronic repression |
| CTBP2 | Corepressor paralog of CTBP1 | Potential component of intronic repressor complex |
| GATA4 | Transcription factor with intronic regulatory elements in its gene | Model for studying intronic autoregulation |
| GATA6 | Transcription factor with intronic regulatory elements | Potential example of GO:0001162 |
| SOX2 | Developmental transcription factor with intronic enhancers | Candidate for intronic regulatory binding |
| POU5F1 | Pluripotency factor with intronic regulatory regions | Model for stem cell-specific intronic control |
| MYC | Oncogene with intronic regulatory elements | Relevant to cancer and intronic feedback |
| TP53 | Tumor suppressor with intronic regulatory sequences | Potential link to intronic autoregulation in cancer |
| BRCA1 | DNA repair gene with intronic regulatory elements | Candidate for intronic binding studies |
| RUNX1 | Transcription factor with intronic regulatory regions | Model for hematopoietic intronic control |
How Is RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding Regulated?
The function described by GO:0001162 is regulated at multiple levels. The availability and activity of the sequence-specific DNA-binding protein can be controlled by signaling pathways; for example, Wnt/β-catenin signaling promotes the recruitment of a repressor complex to the YAP intronic element, thereby enhancing intronic regulatory binding and repressing YAP transcription. Post-translational modifications such as phosphorylation, acetylation, and ubiquitination can alter the DNA-binding affinity or stability of the factor. Chromatin accessibility at the intronic element, governed by histone modifications and nucleosome positioning, also determines whether binding can occur. Additionally, cofactors such as HDACs and corepressors modulate the functional outcome of binding without necessarily affecting the binding event itself.
RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| YAP | Colorectal cancer, YAP overexpression | Knockout of intronic element in HCT116 cells |
| CTNNB1 | Colorectal cancer, Wnt signaling activation | Point mutation of β-catenin phosphorylation sites |
| GATA4 | Congenital heart defects | Knock-in of intronic variant in iPSCs |
| SOX2 | Developmental disorders, stem cell dysfunction | Overexpression of SOX2 with intronic reporter |
| MYC | Multiple cancers, oncogene addiction | CRISPR knockout of intronic regulatory region |
Cancer
Dysregulation of intronic regulatory binding is directly implicated in cancer. In colorectal carcinoma cells, loss of Wnt/β-catenin-mediated repression of the YAP intronic element leads to YAP overexpression, which promotes cell proliferation, survival, and tumor growth. YAP is a well-known oncogene, and its intronic autoregulation represents a critical brake that is often bypassed in tumors. Understanding GO:0001162 provides a mechanistic basis for targeting intronic regulatory elements or their binding proteins in cancers with YAP activation.
Developmental disorders
Intronic regulatory elements are frequently found in genes controlling development, such as GATA4, GATA6, and SOX2. Disruption of sequence-specific binding to these elements could alter gene dosage and contribute to congenital malformations or developmental syndromes. Although direct evidence for GO:0001162 in developmental disorders is still emerging, the principle of intronic feedback control is likely relevant to many developmental gene regulatory networks.
Non-coding variant interpretation
Many disease-associated genetic variants fall within introns, and their functional impact is often unclear. Variants that disrupt the binding motif for GO:0001162 could abolish intronic regulation, leading to gene overexpression or misexpression. Studying this molecular function helps prioritize and interpret non-coding variants in cancer and other diseases.
From RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does the intronic element regulate YAP transcription? | CRISPR knockout of the intronic region in colorectal cancer cell lines |
| Does a specific point mutation in the intronic motif abolish binding? | Point mutation knock-in via CRISPR in HEK293T cells |
| Can a tagged version of the binding protein be used to map occupancy? | Knock-in of FLAG or HA tag at the endogenous locus |
| Does overexpression of the binding protein enhance repression? | Overexpression of the candidate DNA-binding protein in cancer cells |
| What is the genome-wide occupancy of the intronic binding factor? | ChIP-seq after knock-in of tagged protein |
| Can a reporter recapitulate intronic regulation? | Luciferase reporter containing the intronic element |
How to Study the RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding Process
| Method | What It Measures | Typical Application |
|---|---|---|
| ChIP-qPCR | Binding of a protein to a specific intronic region | Validate binding to YAP intronic element |
| ChIP-seq | Genome-wide binding sites of a protein | Map all intronic targets of a factor |
| Luciferase reporter | Transcriptional activity of an intronic element | Test regulatory function of intronic sequence |
| CRISPR knockout | Loss-of-function of intronic element or binding protein | Determine necessity for regulation |
| CRISPR point mutation | Effect of specific motif mutation | Dissect sequence-specific binding |
| RNA-seq | Changes in gene expression | Measure transcriptional output |
| ATAC-seq | Chromatin accessibility | Assess chromatin state at intronic element |
| 3C/Hi-C | Chromatin interactions | Detect looping between intronic element and promoter |
Chromatin immunoprecipitation (ChIP)
ChIP followed by quantitative PCR or sequencing is the gold-standard method to detect sequence-specific binding of proteins to intronic regulatory regions. By crosslinking proteins to DNA, immunoprecipitating with an antibody against the candidate factor, and sequencing the bound DNA, researchers can map occupancy across the genome. In the context of GO:0001162, ChIP can confirm binding to the YAP intronic element and identify other target introns.
Reporter assays
Luciferase or fluorescent reporter assays are used to test whether an intronic element confers transcriptional regulation. The intronic sequence is cloned downstream of a promoter driving a reporter gene, and the effect of the element on reporter expression is measured in the presence or absence of the candidate binding protein. This approach directly demonstrates the regulatory function of the intronic region.
CRISPR-based genomic editing
CRISPR-Cas9 knockout, point mutation, and knock-in are powerful methods to dissect the function of intronic regulatory elements in their native chromosomal context. Deleting the intronic element, mutating the binding motif, or tagging the binding protein allows researchers to determine causality and mechanism. These approaches are essential for validating findings from reporter assays and ChIP.
Transcriptomic analysis
RNA-seq is used to measure changes in transcription of the gene containing the intronic element upon perturbation of the binding factor or the element itself. Differential expression analysis can reveal whether the intronic binding event represses or activates transcription. In the case of YAP, RNA-seq after Wnt activation shows decreased YAP mRNA, consistent with intronic repression.
How CRISPR Can Be Used to Study GO:0001162 RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding
Knockout
CRISPR knockout is used to delete the entire intronic regulatory element or the gene encoding the binding protein. Deleting the intronic element in the YAP gene can test whether it is required for Wnt-mediated repression. Knockout of the binding protein can reveal its global role in intronic regulation. These models are essential for establishing causality in GO:0001162 research.
Point Mutation
Point mutation knock-in via CRISPR allows precise alteration of the DNA-binding motif within the intronic element. By mutating key bases, researchers can abolish binding without deleting the entire region, providing a clean test of sequence specificity. This approach is particularly useful for distinguishing the intronic element from overlapping regulatory sequences.
Knock-in
Knock-in of epitope tags (e.g., FLAG, HA) or fluorescent proteins at the endogenous locus of the binding factor enables ChIP, imaging, and proteomics without overexpression artifacts. Tagged knock-in models are valuable for mapping the interactome and genomic occupancy of proteins that bind intronic regulatory regions.
Overexpression
Overexpression of the candidate DNA-binding protein or a dominant-negative mutant can test sufficiency and dominance in intronic regulation. For example, overexpressing a repressor that binds the YAP intronic element may enhance repression and reduce YAP-driven proliferation. Overexpression models complement loss-of-function studies.
How EDITGENE Supports RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding Research
Researchers studying RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding-related genes often need to determine whether a candidate gene is causally involved in a specific regulatory pathway or disease. EDITGENE provides end-to-end CRISPR services to generate precisely engineered cell models that answer these questions.
Contact EDITGENE today to design your custom CRISPR model for RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding research.
Frequently Asked Questions About RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding
What is GO:0001162?
GO:0001162 is a Gene Ontology molecular function term for RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding. It describes the binding of a protein to a specific DNA sequence within an intron of a Pol II transcript, regulating transcription of that same transcript.
What genes are involved in RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding?
The best-characterized gene is YAP, which contains an intronic element that mediates transcriptional repression in response to Wnt/β-catenin signaling. Other potential genes include GATA4, GATA6, SOX2, and MYC, which have intronic regulatory elements.
How does intronic regulatory binding differ from promoter binding?
Promoter binding occurs at the transcription start site, while intronic regulatory binding occurs within an intron of the transcribed gene. This intronic location allows for feedback regulation of the transcript itself.
What is the role of YAP intronic regulation in cancer?
In colorectal carcinoma cells, Wnt/β-catenin signaling promotes binding of a repressor complex to the YAP intronic element, reducing YAP expression. Loss of this regulation leads to YAP overexpression and tumor growth.
What experimental methods are used to study GO:0001162?
Common methods include ChIP-qPCR, ChIP-seq, luciferase reporter assays, CRISPR knockout and point mutation, RNA-seq, and ATAC-seq.
Can CRISPR be used to study intronic regulatory elements?
Yes, CRISPR knockout can delete the intronic element, point mutation can alter the binding motif, and knock-in can tag the binding protein for functional studies.
What diseases are associated with defects in intronic transcription regulation?
Cancers such as colorectal carcinoma, where YAP is overexpressed due to loss of intronic repression, are directly linked. Developmental disorders and non-coding variant-related diseases are also potential areas.
How is Wnt signaling connected to GO:0001162?
Wnt/β-catenin signaling activates a repressor complex that binds to the YAP intronic element, enhancing intronic regulatory binding and repressing YAP transcription.
What cell models are available for studying intronic regulation?
Knockout, point mutation, knock-in, and overexpression cell models can be generated using CRISPR. These models allow precise dissection of intronic element function.
Why is GO:0001162 important for drug discovery?
Understanding intronic feedback loops can reveal new therapeutic targets. For example, drugs that enhance intronic repression of YAP could reduce YAP-driven tumor growth.
Conclusion
GO:0001162, RNA polymerase II intronic transcription regulatory region sequence-specific DNA binding, represents a critical but often overlooked mechanism of gene control. By binding to intronic elements, proteins can create feedback loops that fine-tune transcription of the containing gene. The YAP gene serves as a paradigm, where Wnt/β-catenin signaling represses YAP through an intronic element, and disruption of this regulation contributes to cancer. Continued research using CRISPR models and genomic methods will uncover additional intronic regulatory circuits and their roles in health and disease.
References
- 1. Konsavage WM Jr et al.. 2012. Wnt/β-catenin signaling regulates Yes-associated protein (YAP) gene expression in colorectal carcinoma cells.. J Biol Chem 287(15):11730-9 PMID: 22337891
