GO:0030014 CCR4-NOT complex: Components, Assembly and Research Methods, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0030014 (CCR4-NOT complex) is an evolutionarily conserved eukaryotic deadenylase complex that removes poly(A) tails and represses translation.
• The complex contains seven core subunits, including the catalytic exonucleases CNOT6/CNOT6L and CNOT7/CNOT8, and the scaffold CNOT1.
• CCR4-NOT is recruited to translating ribosomes and monitors codon optimality, linking mRNA decay to translation elongation.
• Specific tRNAs can recruit CCR4-NOT to ribosomes to promote mRNA decay, revealing a tRNA-dependent quality-control pathway.
• The complex is a multifaceted sensor of molecular signals that instruct eukaryotic mRNA translation and stability.
• Dysregulation of CCR4-NOT subunits is implicated in cancer, neurodevelopmental disorders, and stress resistance/longevity.
Description
The CCR4-NOT complex (GO:0030014) is a conserved eukaryotic deadenylase that initiates cytoplasmic mRNA decay and reduces translation by releasing poly(A)-binding protein (Pab1/PABPC1). It is a central node in post-transcriptional gene regulation, controlling the stability and translation of thousands of mRNAs. Because it integrates signals from translation, tRNA availability, and cellular stress, the complex is essential for normal development and homeostasis. Researchers study GO:0030014 to understand how mRNA fate is determined and how its dysfunction contributes to disease.
CCR4-NOT complex At A Glance
| GO ID | GO:0030014 |
|---|---|
| GO term | CCR4-NOT complex |
| Ontology | cellular_component |
| Synonym | none |
| Major function | Deadenylation-dependent mRNA decay and translational repression |
| Core subunits | Seven, including CNOT1, CNOT2, CNOT3, CNOT4, CNOT6/CNOT6L, CNOT7/CNOT8, and CNOT9/CNOT10/CNOT11 |
| Catalytic activity | Poly(A)-specific 3'-5' exonuclease (deadenylase) |
| Conservation | Eukaryotically conserved |
| Associated processes | mRNA decay, translation repression, codon optimality monitoring, stress response |
What Is GO:0030014?
The CCR4-NOT complex is an eukaryotically conserved deadenylase that can initiate cytoplasmic mRNA decay and reduce translation by releasing poly(A)-binding protein (Pab1/PABPC1). It contains seven core subunits, including two poly(A)-specific exonucleases, Ccr4/CNOT6/CNOT6L and Caf1/Pop2/CNOT7/CNOT8.
Why Is CCR4-NOT complex Important in Cell Biology?
The CCR4-NOT complex is a master regulator of mRNA stability and translation, and its activity is required for diverse biological processes including development, stress resistance, and longevity. Because it directly controls the lifetime of mRNAs, even subtle changes in its function can reshape the transcriptome and proteome, making it a key target for understanding gene regulation and disease.
• Controls cytoplasmic mRNA decay by deadenylation, the rate-limiting step in most mRNA turnover pathways.
• Represses translation by releasing poly(A)-binding protein (Pab1/PABPC1).
• Monitors codon optimality during translation elongation, linking mRNA decay to ribosome function.
• Recruited by specific tRNAs to translating ribosomes to promote mRNA decay.
• Acts as a sensor of molecular signals that instruct mRNA translation and stability.
• Plays roles in stress resistance and longevity in model organisms such as C. elegans.
• Dysregulation is associated with cancer and neurodevelopmental disorders.
• Provides a paradigm for studying co-translational mRNA decay events.
Structure and Composition of CCR4-NOT complex
Core Architecture and Scaffold Subunits
In simple terms: The CCR4-NOT complex is built around a large scaffold protein that holds the other subunits together.
The CCR4-NOT complex contains seven core subunits, with CNOT1 serving as a large scaffold that organizes the assembly. Structural studies have revealed the architecture of the complex and how the subunits interact to form a functional deadenylase. The core includes CNOT1, CNOT2, CNOT3, CNOT4, CNOT6/CNOT6L, CNOT7/CNOT8, and CNOT9/CNOT10/CNOT11.
Catalytic Deadenylase Subunits
In simple terms: Two types of enzymes in the complex chew away the mRNA's poly(A) tail.
The complex contains two poly(A)-specific exonucleases, Ccr4/CNOT6/CNOT6L and Caf1/Pop2/CNOT7/CNOT8, which catalyze deadenylation. These enzymes remove the poly(A) tail, initiating cytoplasmic mRNA decay.
Assembly and Structural Insights
In simple terms: The pieces of the complex fit together in a specific way that determines its activity.
Structural insights have clarified how the CCR4-NOT complex is assembled and how its subunits coordinate to recognize and degrade mRNA targets. The architecture allows the complex to interact with translation machinery and regulatory factors.
Interaction with Translation Machinery
In simple terms: The complex physically connects to ribosomes to monitor translation.
The CCR4-NOT complex monitors the translating ribosome for codon optimality, directly linking mRNA decay to translation elongation. It can be recruited to translating ribosomes by specific tRNAs to promote mRNA decay. These interactions position the complex as a co-translational quality-control factor.
Key Genes Involved in GO:0030014 CCR4-NOT complex
The following genes encode the core subunits and key interactors of the CCR4-NOT complex (GO:0030014).
| Gene | Major Role | Research Relevance |
|---|---|---|
| CNOT1 | Scaffold subunit that organizes the complex | Central to assembly and regulation; implicated in neurodevelopmental disorders |
| CNOT2 | Core subunit, part of the deadenylase module | Required for complex stability and mRNA decay |
| CNOT3 | Core subunit, involved in transcriptional and post-transcriptional regulation | Linked to cancer and developmental processes |
| CNOT4 | Core subunit, E3 ubiquitin ligase domain | May link deadenylation to protein degradation |
| CNOT6 | Catalytic deadenylase (Ccr4 family) | Directly removes poly(A) tails |
| CNOT6L | Catalytic deadenylase (Ccr4 family) | Paralog of CNOT6 with overlapping functions |
| CNOT7 | Catalytic deadenylase (Caf1 family) | Essential for mRNA decay and translation repression |
| CNOT8 | Catalytic deadenylase (Caf1 family) | Paralog of CNOT7 |
| CNOT9 | Core subunit, interacts with CNOT1 | Modulates complex activity |
| CNOT10 | Core subunit, part of the CNOT9/10/11 module | Contributes to complex integrity |
| CNOT11 | Core subunit, part of the CNOT9/10/11 module | Contributes to complex integrity |
| PABPC1 | Poly(A)-binding protein released by CCR4-NOT | Target of CCR4-NOT-mediated translational repression |
| CNOT6L | Deadenylase | Studied in cancer and mRNA stability |
| CNOT2 | Core subunit | Involved in stress response |
| CNOT3 | Core subunit | Associated with longevity in C. elegans |
| CNOT1 | Scaffold | Target for structural studies |
| CNOT7 | Deadenylase | Key for codon optimality response |
| CNOT8 | Deadenylase | Paralog with redundant roles |
How Is CCR4-NOT complex Regulated?
The CCR4-NOT complex is regulated by multiple signals that instruct mRNA translation and stability. Its recruitment to ribosomes is influenced by codon optimality and tRNA availability. The complex also responds to stress conditions, contributing to stress resistance and longevity in model organisms. These regulatory inputs allow the complex to act as a multifaceted sensor of molecular signals.
CCR4-NOT complex and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CNOT1 | Neurodevelopmental disorders | Knockout or point-mutation in neuronal cell lines |
| CNOT3 | Cancer | Knockout in cancer cell lines |
| CNOT6L | Cancer | Overexpression or knockout in tumor models |
| CNOT7 | mRNA decay dysregulation | Knockout in HEK293 cells |
| CNOT8 | mRNA decay dysregulation | Knockout in HeLa cells |
Cancer
Dysregulation of CCR4-NOT subunits has been implicated in cancer, where altered mRNA stability can promote tumorigenesis. The complex's role in controlling oncogene and tumor suppressor mRNA turnover makes it a potential therapeutic target.
Neurodevelopmental Disorders
Mutations in core subunits such as CNOT1 have been linked to neurodevelopmental disorders, highlighting the importance of precise mRNA regulation in the nervous system.
Stress Resistance and Longevity
In C. elegans, the CCR4-NOT complex plays a role in stress resistance and longevity, suggesting that its activity modulates aging pathways.
From CCR4-NOT complex-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| What is the effect of CNOT1 loss on mRNA stability? | CNOT1 knockout cell line |
| How does a point mutation in CNOT7 affect deadenylase activity? | CNOT7 point-mutation knock-in |
| Where does CCR4-NOT localize in cells? | Tagged knock-in of CNOT1 with fluorescent protein |
| What happens when CNOT6L is overexpressed? | CNOT6L overexpression cell line |
| Which mRNAs are targeted by CCR4-NOT? | Knockout followed by RNA-seq |
| How does CCR4-NOT respond to stress? | Stress treatment in C. elegans |
How to Study the CCR4-NOT complex Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Ribo-seq | Ribosome occupancy and codon optimality | Studying translation efficiency |
| RNA-seq | mRNA abundance and stability | Identifying target transcripts |
| Proteomics | Protein interactions and modifications | Mapping complex composition |
| Live-cell imaging | Subcellular localization | Tracking complex dynamics |
| Deadenylation assay | Poly(A) tail shortening | Measuring catalytic activity |
| CLIP-seq | RNA binding sites | Mapping direct targets |
| CRISPR screening | Gene essentiality and modifiers | Identifying regulators of CCR4-NOT |
Ribosome Profiling (Ribo-seq)
Ribo-seq measures translation at codon resolution and has been used to show that CCR4-NOT monitors codon optimality. It can reveal how loss of CCR4-NOT subunits affects ribosome occupancy.
RNA-seq and Transcriptomics
RNA-seq quantifies mRNA abundance and stability changes upon CCR4-NOT perturbation, identifying target transcripts.
Proteomics and Interactomics
Affinity purification coupled to mass spectrometry can identify CCR4-NOT interactors and post-translational modifications.
Imaging and Live-Cell Tracking
Fluorescent tagging of core subunits allows visualization of complex localization and dynamics in living cells.
How CRISPR Can Be Used to Study GO:0030014 CCR4-NOT complex
Knockout
CRISPR knockout of core CCR4-NOT subunits such as CNOT1 or CNOT7 can reveal their essential roles in mRNA decay and cell viability.
Point Mutation
Point mutations in catalytic residues of CNOT6/CNOT7 can dissect deadenylase-dependent versus independent functions.
Knock-in
Knock-in of epitope or fluorescent tags into endogenous loci enables tracking of complex assembly and localization.
Overexpression
Overexpression of wild-type or mutant subunits can test gain-of-function effects on mRNA stability and translation.
How EDITGENE Supports CCR4-NOT complex Research
Researchers studying CCR4-NOT complex-related genes often need to determine whether a candidate gene is causally involved in mRNA regulation, translation, or disease. EDITGENE provides CRISPR-based cell models and screening services to accelerate this discovery.
Contact EDITGENE today to design your custom CRISPR model for CCR4-NOT complex research.
Frequently Asked Questions About CCR4-NOT complex
What is the CCR4-NOT complex?
The CCR4-NOT complex (GO:0030014) is an eukaryotically conserved deadenylase that initiates cytoplasmic mRNA decay and reduces translation by releasing poly(A)-binding protein (Pab1/PABPC1).
What genes are involved in the CCR4-NOT complex?
Core genes include CNOT1, CNOT2, CNOT3, CNOT4, CNOT6, CNOT6L, CNOT7, CNOT8, CNOT9, CNOT10, and CNOT11.
What is the function of GO:0030014?
It functions in deadenylation-dependent mRNA decay and translational repression.
How does CCR4-NOT monitor codon optimality?
It is recruited to translating ribosomes and senses codon optimality to trigger mRNA decay.
What diseases are linked to CCR4-NOT complex?
Dysregulation is associated with cancer and neurodevelopmental disorders.
How can I study CCR4-NOT complex in the lab?
Common methods include Ribo-seq, RNA-seq, proteomics, and CRISPR knockout models.
What is the role of CNOT1?
CNOT1 is a scaffold subunit that organizes the complex.
What is the role of CNOT7?
CNOT7 is a catalytic deadenylase that removes poly(A) tails.
Is CCR4-NOT conserved in eukaryotes?
Yes, it is eukaryotically conserved.
What is the connection between CCR4-NOT and stress resistance?
In C. elegans, the complex plays a role in stress resistance and longevity.
Conclusion
The CCR4-NOT complex (GO:0030014) is a central regulator of mRNA stability and translation, with essential roles in development, stress response, and disease. Understanding its structure, regulation, and targets continues to reveal fundamental principles of gene expression. EDITGENE offers comprehensive CRISPR services to study this complex in any experimental system.
References
- 1. Zhu X et al.. 2024. Specific tRNAs promote mRNA decay by recruiting the CCR4-NOT complex to translating ribosomes.. Science 386(6724):eadq8587 PMID: 39571015
- 2. Collart MA et al.. 2012. The Ccr4--not complex.. Gene 492(1):42-53 PMID: 22027279
- 3. Buschauer R et al.. 2020. The Ccr4-Not complex monitors the translating ribosome for codon optimality.. Science 368(6488) PMID: 32299921
- 4. 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
- 5. Collart MA et al.. 2023. Roles of the CCR4-Not complex in translation and dynamics of co-translation events.. Wiley Interdiscip Rev RNA 15(1):e1827 PMID: 38009591
- 6. Chalabi Hagkarim N et al.. 2020. The Regulatory Properties of the Ccr4-Not Complex.. Cells 9(11) PMID: 33138308
- 7. Wu CW et al.. 2024. CCR4-NOT complex in stress resistance and longevity in C. elegans.. Aging (Albany NY) 16(10):8400-8401 PMID: 38761173
- 8. Collart MA et al.. 2017. The Ccr4-Not Complex: Architecture and Structural Insights.. Subcell Biochem 83:349-379 PMID: 28271483
