GO:1905762 CCR4-NOT complex binding: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1905762 (CCR4-NOT complex binding) is a molecular function describing the selective binding to a CCR4-NOT complex, a conserved multi-subunit assembly that regulates mRNA deadenylation, translation, and transcription.
• The CCR4-NOT complex is a central node in eukaryotic gene expression, monitoring codon optimality on translating ribosomes and triggering mRNA degradation.
• Key proteins that bind the CCR4-NOT complex include CNOT1, CNOT10, CNOT11, and the catalytic subunits CNOT6/CNOT6L and CNOT7/CNOT8, which form a structural platform for protein-protein interactions.
• Disruption of CCR4-NOT complex components leads to transcription-mediated genome instability, linking this binding function to cancer and developmental disorders.
• Research on CCR4-NOT complex binding employs CRISPR knockout, point mutation, knock-in, and overexpression models combined with Ribo-seq, RNA-seq, and proteomics.
• EDITGENE provides comprehensive CRISPR services to dissect the molecular interactions and disease relevance of CCR4-NOT complex binding.
Description
The Gene Ontology (GO) term GO:1905762, CCR4-NOT complex binding, defines the molecular function of selectively interacting with a CCR4-NOT complex. The CCR4-NOT complex is a large, evolutionarily conserved multi-protein assembly that plays a pivotal role in the regulation of gene expression at multiple levels, including mRNA deadenylation, translational repression, and transcription. This binding function is critical for recruiting the complex to its targets and for coordinating its diverse activities. Researchers study CCR4-NOT complex binding to understand how cells control mRNA stability and translation in response to developmental and environmental cues. The complex monitors translating ribosomes for codon optimality, linking the binding event directly to mRNA degradation. Furthermore, the CCR4-NOT complex is involved in heterochromatin formation and genome stability, underscoring its broad impact on cellular physiology. Given its central role, mutations or dysregulation of proteins that bind the CCR4-NOT complex are associated with various human diseases, including cancer and neurodevelopmental disorders. Thus, GO:1905762 represents a key molecular function for understanding post-transcriptional gene regulation and its pathological implications.
CCR4-NOT complex binding At A Glance
| GO ID | GO:1905762 |
|---|---|
| GO term | CCR4-NOT complex binding |
| Ontology | molecular_function |
| Synonym | None |
| Major function | Binding to a CCR4-NOT complex, facilitating its recruitment to mRNA targets and regulatory sites. |
| Related complex | CCR4-NOT complex (a multi-subunit assembly including CNOT1, CNOT2, CNOT3, CNOT4, CNOT6/6L, CNOT7/8, CNOT9, CNOT10, CNOT11) |
| Biological context | mRNA deadenylation, translational repression, transcription regulation, genome stability |
| Disease relevance | Cancer, neurodevelopmental disorders, genome instability |
What Is GO:1905762?
CCR4-NOT complex binding (GO:1905762) is a molecular function defined as the selective and non-covalent interaction with a CCR4-NOT complex. This binding event is essential for the recruitment of the CCR4-NOT complex to its substrates, such as mRNAs, and for the assembly of larger regulatory machineries. The function is attributed to proteins that physically associate with one or more subunits of the CCR4-NOT complex, thereby modulating its deadenylase, translational repressor, or transcriptional regulatory activities.
Why Is CCR4-NOT complex binding Important in Cell Biology?
CCR4-NOT complex binding is fundamentally important because it governs the recruitment and activity of one of the most versatile gene expression regulators in eukaryotes. The CCR4-NOT complex is a hub for mRNA decay and translational control, and its binding partners determine substrate specificity and regulatory outcomes. This function is critical for processes such as codon optimality monitoring during translation, where the complex binds to ribosomes and triggers mRNA degradation. Additionally, CCR4-NOT complex binding is implicated in heterochromatin formation and the maintenance of genome stability, with disruption leading to transcription-associated instability. Understanding this binding function provides insights into how cells fine-tune gene expression and how its dysregulation contributes to diseases like cancer and developmental disorders.
• Regulates mRNA stability and translation efficiency by recruiting the CCR4-NOT deadenylase complex to specific transcripts.
• Monitors codon optimality on translating ribosomes, linking translation elongation to mRNA degradation.
• Controls transcription efficiency and heterochromatin formation, influencing genome stability.
• Plays a role in developmental processes and cell differentiation through post-transcriptional gene regulation.
• Dysregulation is associated with cancer, as disruption of the complex leads to genome instability.
• Provides a target for therapeutic intervention in diseases characterized by aberrant mRNA metabolism.
• Essential for understanding the molecular basis of ribosomopathies and neurodegenerative diseases linked to RNA processing.
• Key for interpreting CRISPR screens and functional genomics data involving RNA-binding proteins.
• Facilitates the study of protein-protein interaction networks in gene regulation.
• Offers a model system for studying the evolution of multi-subunit complexes and their binding specificities.
What Happens During CCR4-NOT complex binding?
Recognition and Recruitment to mRNA Targets
In simple terms: Proteins that bind the CCR4-NOT complex help it find the right mRNAs to degrade or silence.
The binding of the CCR4-NOT complex to its targets is often mediated by sequence-specific RNA-binding proteins or by the ribosome itself. For instance, during codon optimality surveillance, the CCR4-NOT complex is recruited to ribosomes stalled on suboptimal codons, leading to mRNA degradation. This recruitment involves direct interactions between the complex and ribosomal components or associated factors, highlighting the importance of CCR4-NOT complex binding in translating the genetic code into mRNA stability.
Deadenylation and mRNA Decay
In simple terms: Once bound, the CCR4-NOT complex shortens the mRNA's poly(A) tail, marking it for destruction.
The CCR4-NOT complex possesses deadenylase activity, primarily through its CNOT6/CNOT6L and CNOT7/CNOT8 subunits. Binding to mRNA targets brings the catalytic subunits into proximity with the poly(A) tail, leading to progressive deadenylation. This process is a rate-limiting step in mRNA decay and is tightly regulated by interactions with other proteins that modulate the complex's binding and activity.
Translational Repression
In simple terms: Binding can also stop mRNAs from being translated into proteins.
Beyond deadenylation, the CCR4-NOT complex can repress translation initiation. Binding of the complex to the 5' cap or to initiation factors interferes with ribosome assembly. This dual role in decay and repression ensures robust silencing of target mRNAs, and the binding function is essential for these regulatory outcomes.
Transcriptional Regulation and Genome Stability
In simple terms: The complex also binds in the nucleus to influence transcription and protect DNA.
In the nucleus, CCR4-NOT complex binding is involved in transcriptional regulation, including the reduction of transcription efficiency in heterochromatin. Disruption of the complex leads to transcription-mediated genome instability, suggesting that its binding to chromatin-associated factors is critical for maintaining genomic integrity. These nuclear functions expand the repertoire of CCR4-NOT complex binding beyond cytoplasmic mRNA metabolism.
Key Genes Involved in GO:1905762 CCR4-NOT complex binding
The following genes encode proteins that are either subunits of the CCR4-NOT complex or known to bind it, playing diverse roles in gene regulation.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CNOT1 | Scaffold subunit of the CCR4-NOT complex | Central to complex assembly and protein-protein interactions; target for knockout studies |
| CNOT2 | Non-catalytic subunit | Modulates deadenylase activity and substrate specificity |
| CNOT3 | Non-catalytic subunit | Involved in transcriptional regulation and development |
| CNOT4 | E3 ubiquitin ligase subunit | Links the complex to ubiquitination pathways |
| CNOT6 | Catalytic deadenylase subunit | Executes mRNA deadenylation; target for point mutations |
| CNOT6L | Catalytic deadenylase subunit | Paralog of CNOT6 with overlapping functions |
| CNOT7 | Catalytic deadenylase subunit | Deadenylase activity; knockout models available |
| CNOT8 | Catalytic deadenylase subunit | Paralog of CNOT7; contributes to deadenylation |
| CNOT9 | Non-catalytic subunit | Involved in miRNA-mediated silencing |
| CNOT10 | Non-catalytic subunit | Forms structural platform with CNOT1 and CNOT11 |
| CNOT11 | Non-catalytic subunit | Interacts with CNOT1 and CNOT10 to form a module |
| BTG1 | Binds CCR4-NOT and recruits it to targets | Regulates cell proliferation and differentiation |
| BTG2 | Binds CCR4-NOT and recruits it to targets | Tumor suppressor and regulator of mRNA stability |
| TOB1 | Binds CCR4-NOT and recruits it to targets | Involved in cell growth and development |
| TNRC6A | Binds CCR4-NOT in miRNA pathway | Essential for miRNA-mediated gene silencing |
| TNRC6B | Binds CCR4-NOT in miRNA pathway | Paralog of TNRC6A; miRNA effector |
| TNRC6C | Binds CCR4-NOT in miRNA pathway | Paralog of TNRC6A; miRNA effector |
| DDX6 | Binds CCR4-NOT and enhances decapping | Links deadenylation to decapping and mRNA decay |
How Is CCR4-NOT complex binding Regulated?
The binding of the CCR4-NOT complex to its targets is regulated by multiple mechanisms. Post-translational modifications of complex subunits, such as phosphorylation and ubiquitination, can modulate interactions. Additionally, the availability of adaptor proteins like BTG/TOB family members and TNRC6 proteins determines substrate specificity and binding affinity. Cellular signaling pathways, including those responding to stress or growth factors, can influence the composition and activity of the complex, thereby affecting its binding to mRNAs. The complex also autoregulates its own mRNA levels through feedback loops.
CCR4-NOT complex binding and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CNOT1 | Neurodevelopmental disorder with intellectual disability | Knockout and knock-in mouse models; patient-derived iPSCs |
| CNOT3 | Acute myeloid leukemia (AML) | CRISPR knockout in leukemia cell lines; xenograft models |
| CNOT6/CNOT6L | Cancer cell proliferation and survival | Point mutation of catalytic residues; overexpression studies |
| BTG2 | Tumor suppression in breast and prostate cancer | Knockout mice; overexpression in cancer cell lines |
| TNRC6A | miRNA dysregulation in cancer | Knockout and rescue experiments in cancer cells |
Cancer and Genome Instability
Disruption of the mammalian CCR4-NOT complex contributes to transcription-mediated genome instability, a hallmark of cancer. Loss of CNOT subunits can lead to DNA damage and chromosomal rearrangements, promoting tumorigenesis. Additionally, the complex regulates the stability of mRNAs encoding oncogenes and tumor suppressors, and its dysregulation is observed in various cancers.
Neurodevelopmental Disorders
Mutations in genes encoding CCR4-NOT complex subunits or its binding partners have been linked to neurodevelopmental disorders. For example, CNOT1 mutations are associated with intellectual disability and developmental delay. The complex's role in mRNA metabolism is critical for neuronal function, and its impairment can lead to synaptic dysfunction.
Ribosomopathies and Translation-Related Diseases
Given its role in monitoring codon optimality and ribosome-associated mRNA degradation, defects in CCR4-NOT complex binding can contribute to ribosomopathies and other translation-related diseases. Impaired deadenylation leads to accumulation of aberrant mRNAs, which can be toxic to cells.
From CCR4-NOT complex binding-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of CNOT1 affect mRNA deadenylation and stability? | CRISPR knockout of CNOT1 in HEK293T cells followed by RNA-seq and deadenylation assays |
| What is the role of CNOT6 catalytic activity in codon optimality? | Point mutation of catalytic residues in CNOT6; Ribo-seq analysis |
| How does a disease-associated mutation in CNOT1 affect complex assembly? | Knock-in of patient mutation using CRISPR; proteomics and structural studies |
| Where does CCR4-NOT complex bind on mRNAs? | Tagged knock-in of CNOT1 with APEX2 for proximity labeling; CLIP-seq |
| Does overexpression of BTG2 enhance mRNA decay? | Overexpression of BTG2 in cancer cell lines; mRNA stability assays |
| Can CRISPR screening identify novel CCR4-NOT complex binding regulators? | Genome-wide CRISPR knockout library screening with a reporter of mRNA stability |
How to Study the CCR4-NOT complex binding Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Ribo-seq | Ribosome occupancy and codon-level translation | Studying codon optimality and ribosome-associated mRNA degradation |
| RNA-seq | Steady-state mRNA levels and alternative splicing | Global analysis of mRNA stability upon CCR4-NOT perturbation |
| AP-MS | Protein-protein interactions | Identifying novel CCR4-NOT complex binding partners |
| CLIP-seq | RNA binding sites of proteins | Mapping where CCR4-NOT complex binds on mRNAs |
| Proximity labeling (APEX2/BioID) | Proteins in close proximity to a bait | Defining the interactome of CCR4-NOT complex in living cells |
| CRISPR knockout screening | Gene essentiality and pathway identification | Discovering regulators of CCR4-NOT complex binding |
| In vitro deadenylation assay | Deadenylase activity | Measuring the effect of binding partners on catalytic activity |
| Structural biology (cryo-EM) | 3D structure of complexes | Understanding the architecture of CCR4-NOT complex binding interfaces |
Ribosome Profiling (Ribo-seq)
Ribo-seq measures ribosome occupancy on mRNAs at codon resolution. It is used to study how CCR4-NOT complex binding is influenced by codon optimality and to identify mRNAs undergoing ribosome-associated degradation. This method provides a snapshot of translation elongation and can reveal defects in mRNA quality control upon disruption of CCR4-NOT binding.
RNA Sequencing (RNA-seq)
RNA-seq quantifies steady-state mRNA levels and can detect changes in transcript stability and poly(A) tail length. It is widely used to assess the impact of CCR4-NOT complex binding on global gene expression. By comparing wild-type and mutant cells, researchers can identify mRNAs whose stability depends on the complex.
Proteomics and Interactomics
Affinity purification coupled with mass spectrometry (AP-MS) identifies proteins that bind the CCR4-NOT complex. This approach has been used to define the CNOT1-CNOT10-CNOT11 module and its interaction partners. Proteomics can also reveal post-translational modifications that regulate binding.
Imaging and Proximity Labeling
Fluorescence microscopy and proximity labeling techniques (e.g., APEX2, BioID) can visualize where CCR4-NOT complex binding occurs in cells and identify nearby proteins. These methods provide spatial and temporal resolution of binding events in living cells.
How CRISPR Can Be Used to Study GO:1905762 CCR4-NOT complex binding
Knockout
CRISPR knockout of genes encoding CCR4-NOT complex subunits or binding partners is used to study loss-of-function phenotypes. For example, knockout of CNOT1 or CNOT3 leads to mRNA deadenylation defects and genome instability. These models are valuable for assessing the contribution of specific binding interactions to cellular processes.
Point Mutation
Point mutations can be introduced into catalytic residues or binding interfaces to dissect the molecular function of CCR4-NOT complex binding. For instance, mutating the catalytic glutamate in CNOT6 abolishes deadenylase activity without affecting complex assembly, allowing separation of binding from catalysis. Such models are crucial for understanding the precise role of binding versus enzymatic activity.
Knock-in
Knock-in of tagged versions of CCR4-NOT subunits (e.g., GFP or APEX2) enables visualization and proximity labeling of the complex in its native context. Knock-in of disease-associated mutations can model human disorders and reveal how altered binding contributes to pathology.
Overexpression
Overexpression of CCR4-NOT complex subunits or binding partners can amplify their effects on mRNA stability and translation. For example, overexpression of BTG2 enhances deadenylation of target mRNAs and inhibits cell proliferation. Overexpression models are useful for gain-of-function studies and for identifying dominant-negative effects.
How EDITGENE Supports CCR4-NOT complex binding Research
Researchers studying CCR4-NOT complex binding-related genes often need to determine whether a candidate gene is causally involved in mRNA regulation, genome stability, or disease. EDITGENE provides a comprehensive suite of CRISPR-based services to enable precise genetic modifications and functional interrogation of these genes in relevant cell models.
Contact EDITGENE today to design your custom CRISPR model for CCR4-NOT complex binding research.
Frequently Asked Questions About CCR4-NOT complex binding
What is GO:1905762?
GO:1905762 is the Gene Ontology molecular function term for CCR4-NOT complex binding, defined as binding to a CCR4-NOT complex.
What genes are involved in CCR4-NOT complex binding?
Genes encoding subunits of the CCR4-NOT complex (e.g., CNOT1, CNOT2, CNOT3, CNOT6, CNOT7, CNOT8, CNOT10, CNOT11) and its binding partners (e.g., BTG1, BTG2, TOB1, TNRC6A/B/C, DDX6) are involved.
What is the function of the CCR4-NOT complex?
The CCR4-NOT complex regulates mRNA deadenylation, translational repression, and transcription, playing a central role in gene expression.
How does CCR4-NOT complex binding affect mRNA stability?
Binding recruits the complex to mRNAs, leading to poly(A) tail shortening and subsequent degradation, thereby controlling mRNA stability.
What diseases are associated with CCR4-NOT complex binding?
Dysregulation is linked to cancer, neurodevelopmental disorders, and genome instability.
What experimental methods are used to study CCR4-NOT complex binding?
Common methods include Ribo-seq, RNA-seq, AP-MS, CLIP-seq, proximity labeling, and CRISPR screening.
How can CRISPR be used to study CCR4-NOT complex binding?
CRISPR knockout, point mutation, knock-in, and overexpression models allow functional dissection of binding partners and their roles in mRNA regulation.
What is the role of CNOT1 in CCR4-NOT complex binding?
CNOT1 is a scaffold subunit that interacts with multiple partners, forming a structural platform for protein-protein interactions.
How does codon optimality relate to CCR4-NOT complex binding?
The complex monitors translating ribosomes for codon optimality; suboptimal codons trigger ribosome stalling and recruitment of the complex for mRNA degradation.
Can EDITGENE help create custom cell models for CCR4-NOT research?
Yes, EDITGENE offers CRISPR knockout, point mutation, knock-in, overexpression, and library screening services tailored to CCR4-NOT complex binding studies.
Conclusion
CCR4-NOT complex binding (GO:1905762) is a fundamental molecular function that orchestrates mRNA deadenylation, translational repression, and transcriptional regulation. Its role in monitoring codon optimality and maintaining genome stability underscores its importance in cellular homeostasis and disease. Understanding the precise mechanisms and regulation of this binding function will provide insights into gene expression control and open avenues for therapeutic intervention. EDITGENE's advanced CRISPR services empower researchers to dissect these interactions with precision and scale.
References
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- 3. Höpfler M et al.. 2023. Mechanism of ribosome-associated mRNA degradation during tubulin autoregulation.. Mol Cell 83(13):2290-2302.e13 PMID: 37295431
- 4. Monteagudo-Mesas P et al.. 2022. Ccr4-Not complex reduces transcription efficiency in heterochromatin.. Nucleic Acids Res 50(10):5565-5576 PMID: 35640578
- 5. Hagkarim NC et al.. 2023. Disruption of the Mammalian Ccr4-Not Complex Contributes to Transcription-Mediated Genome Instability.. Cells 12(14) PMID: 37508532
- 6. Caulier G et al.. 2025. The CCR4-NOT complex: a multifaceted sensor of molecular signals instructing eukaryotic mRNA translation and stability.. Nucleic Acids Res 53(22) PMID: 41459743
- 7. Collart MA et al.. 2017. The Ccr4-Not Complex: Architecture and Structural Insights.. Subcell Biochem 83:349-379 PMID: 28271483
- 8. Mauxion F et al.. 2023. The human CNOT1-CNOT10-CNOT11 complex forms a structural platform for protein-protein interactions.. Cell Rep 42(1):111902 PMID: 36586408
