GO:0010825 positive regulation of centrosome duplication: Regulation, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0010825 describes any process that increases the frequency, rate or extent of centrosome duplication, the replication of a centrosome comprising a pair of centrioles and pericentriolar material.
• Centrosome duplication is tightly controlled by a licensing mechanism that ensures each centrosome duplicates once per cell cycle, preventing centrosome amplification.
• Key positive regulators include PLK4, CEP152, CEP192, and other centriole duplication factors that cooperate to recruit PLK4 to the centriole.
• Dysregulation of centrosome duplication leads to centrosome amplification, a hallmark of many cancers and a potential therapeutic target.
• Post-translational modifications, such as acetylation, and RNA-binding proteins like Unkempt, modulate centrosome duplication and centriole overduplication.
• CRISPR-based knockout, point mutation, knock-in, and overexpression models are essential to dissect the causal roles of genes in positive regulation of centrosome duplication.
Description
Centrosome duplication is a fundamental cell cycle event that ensures the formation of a bipolar mitotic spindle and accurate chromosome segregation. The Gene Ontology term GO:0010825, positive regulation of centrosome duplication, encompasses any process that increases the frequency, rate or extent of this duplication event. This regulation is critical because errors in centrosome number or structure can lead to aneuploidy, genomic instability, and cancer. Researchers studying cell division, ciliogenesis, and tumorigenesis require a precise understanding of the molecular players that positively regulate centrosome duplication. This article synthesizes authoritative QuickGO data and verified PubMed literature to provide a research-grade overview of GO:0010825, its mechanisms, key genes, and experimental approaches.
positive regulation of centrosome duplication At A Glance
| GO ID | GO:0010825 |
|---|---|
| GO term | positive regulation of centrosome duplication |
| Ontology | biological_process |
| Synonym | none |
| Major function | Increases the frequency, rate or extent of centrosome duplication, a key step in cell cycle progression and spindle assembly. |
| Related process | Centrosome duplication (GO:0007099), regulation of centrosome duplication (GO:0010824) |
| Key regulators | PLK4, CEP152, CEP192, and other centriole duplication factors |
| Disease relevance | Centrosome amplification is linked to cancer and developmental disorders |
What Is GO:0010825?
GO:0010825 is a biological process term defined as any process that increases the frequency, rate or extent of centrosome duplication. Centrosome duplication is the replication of a centrosome, a structure comprised of a pair of centrioles and peri-centriolar material from which a microtubule spindle apparatus is organized. In essence, this term captures the positive regulatory inputs that drive the duplication cycle, ensuring that a cell properly duplicates its centrosome before division.
Why Is positive regulation of centrosome duplication Important in Cell Biology?
Positive regulation of centrosome duplication is essential for maintaining genomic stability, as it ensures that each cell has exactly two centrosomes before mitosis. When this regulation is perturbed, cells can acquire extra centrosomes, leading to multipolar spindles, aneuploidy, and tumorigenesis. Understanding the positive regulators of this process provides insights into cancer biology and identifies potential therapeutic targets, such as PLK4 inhibitors.
• Ensures proper centrosome number for bipolar spindle formation and accurate chromosome segregation.
• Dysregulation leads to centrosome amplification, a common feature of many solid tumors and hematological malignancies.
• Positive regulators like PLK4 are attractive targets for cancer therapy, with inhibitors in clinical trials.
• Centrosome duplication is linked to ciliogenesis, affecting signaling pathways in development and disease.
• RNA-binding proteins and local translation programs contribute to centriole overduplication, revealing new regulatory layers.
• Deacetylases can suppress centrosome duplication and amplification, highlighting epigenetic control.
• Geminin family members act as master regulators of centriole amplification and multiciliogenesis.
• Proximity interactions among centrosome components identify novel regulators of centriole duplication.
• Understanding positive regulation aids in interpreting mutations found in microcephaly and dwarfism syndromes.
• CRISPR screens can systematically identify positive regulators of centrosome duplication.
What Happens During positive regulation of centrosome duplication?
Licensing and Initiation
In simple terms: The cell gives a green light for the centrosome to start copying itself, but only once per cycle.
Centrosome duplication begins with a licensing step that ensures each centrosome duplicates only once per cell cycle. Positive regulation at this stage involves the recruitment of PLK4 to the centriole, a process that requires cooperation between CEP192 and CEP152. These factors form a platform for PLK4 activation and subsequent downstream events.
Centriole Elongation and Maturation
In simple terms: The new centriole grows and matures into a fully functional structure.
After initiation, the procentriole elongates and matures. Positive regulators such as Centrobin control centriole stability and ciliogenesis. Proximity interactions among centrosome components have identified additional regulators that promote centriole duplication.
Post-translational Modifications
In simple terms: Chemical tags on proteins can either boost or brake centrosome duplication.
Acetylation and deacetylation play a role in regulating centrosome duplication. Deacetylases have been shown to suppress centrosome duplication and amplification, indicating that acetylation may positively regulate the process. Other modifications, such as phosphorylation by PLK4, are critical for driving duplication.
Local Translation and RNA-Binding Proteins
In simple terms: Proteins are made right at the centrosome to quickly supply building blocks.
Recent studies have revealed a local translation program at the centriole. The Unkempt RNA-binding protein regulates centriole overduplication by controlling local translation of centrosomal mRNAs. This adds a layer of positive regulation that is spatially restricted.
Geminin Family and Multiciliogenesis
In simple terms: Special proteins act as master switches for making many centrioles in cells that need them.
Geminin family members are master regulators of centriole amplification and multiciliogenesis. They positively regulate the production of multiple centrioles in cells that form motile cilia, such as those in the respiratory tract.
Key Genes Involved in GO:0010825 positive regulation of centrosome duplication
The following genes and proteins are key players in the positive regulation of centrosome duplication, as supported by the verified literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| PLK4 | Master kinase that initiates centriole duplication | Target for cancer therapy; inhibitor CFI-400945 in trials |
| CEP152 | Recruits PLK4 to the centriole | Mutations cause Seckel syndrome and microcephaly |
| CEP192 | Cooperates with CEP152 in PLK4 recruitment | Essential for centriole duplication |
| Centrobin | Controls centriole stability and ciliogenesis | Regulates primary cilia formation |
| Unkempt | RNA-binding protein regulating local translation | Controls centriole overduplication |
| Geminin | Inhibits licensing; family members regulate amplification | Master regulator of multiciliogenesis |
| Geminin family members | Regulate centriole amplification | Involved in multiciliogenesis |
| HDACs | Deacetylases that suppress centrosome duplication | Potential targets to modulate centrosome numbers |
| SAS-6 | Core centriole assembly factor | Conserved from worms to humans |
| STIL | Required for centriole duplication | Interacts with PLK4 and CEP152 |
| CPAP | Centriole elongation factor | Mutations cause microcephaly |
| CEP135 | Centriole assembly factor | Interacts with CEP152 and PLK4 |
| CEP63 | Centriole duplication factor | Mutations cause Seckel syndrome |
| MCPH1 | Microcephaly protein | Regulates centrosome duplication |
| WDR62 | Centrosome-associated protein | Mutations cause microcephaly |
| CDK2 | Cyclin-dependent kinase | Regulates licensing and duplication |
| Cyclin E | Activates CDK2 | Promotes centrosome duplication |
How Is positive regulation of centrosome duplication Regulated?
Positive regulation of centrosome duplication is controlled by a licensing system that involves CDK2-cyclin E activity, which phosphorylates key substrates to promote duplication. PLK4 is a central regulator, and its activity is tightly controlled by trans-autophosphorylation and degradation. Deacetylases can suppress duplication, indicating that acetylation status modulates the process. Additionally, RNA-binding proteins like Unkempt regulate local translation of centrosomal components, adding a post-transcriptional layer of control.
positive regulation of centrosome duplication and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| PLK4 | Liver cancer, centrosome amplification | Knockout or overexpression in hepatocellular carcinoma cell lines; xenograft models |
| CEP152 | Seckel syndrome, microcephaly | Patient-derived fibroblasts; CRISPR knock-in of patient mutations |
| Centrobin | Ciliopathies | Knockout in zebrafish or mouse models |
| Unkempt | Centriole overduplication | Knockdown or knockout in cultured cells; RNA-seq |
| Geminin | Multiciliogenesis disorders | Knockout in mouse models; airway epithelial cells |
Cancer
Centrosome amplification, often resulting from deregulated positive regulation of centrosome duplication, is a hallmark of many cancers and contributes to aneuploidy and tumor progression. PLK4 overexpression drives centrosome amplification and is associated with poor prognosis in liver cancer and other malignancies. Inhibitors of PLK4, such as CFI-400945, suppress tumor growth by inducing cell cycle perturbation and antitumor immunity.
Microcephaly and Developmental Disorders
Mutations in genes that positively regulate centrosome duplication, such as CEP152, CEP63, and CPAP, cause microcephaly and Seckel syndrome, highlighting the importance of precise centrosome duplication in brain development.
Ciliopathies
Defects in centrosome duplication can lead to impaired ciliogenesis, resulting in ciliopathies that affect multiple organs. Centrobin, a positive regulator, controls primary ciliogenesis in vertebrates.
From positive regulation of centrosome duplication-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does PLK4 overexpression drive centrosome amplification? | Overexpression cell model (doxycycline-inducible PLK4) |
| What is the effect of a CEP152 point mutation on PLK4 recruitment? | Point mutation knock-in cell line |
| How does Unkempt regulate local translation? | Knockout cell line followed by Ribo-seq |
| Can a PLK4 inhibitor suppress tumor growth? | Xenograft mouse model with PLK4-overexpressing cancer cells |
| What is the role of Geminin in multiciliogenesis? | Knockout mouse model; airway epithelial cell culture |
| Does acetylation regulate centrosome duplication? | Knock-in of acetylation-deficient mutants; HDAC inhibitors |
How to Study the positive regulation of centrosome duplication Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Fluorescence microscopy | Centrosome number and duplication | Quantifying amplification in cancer cells |
| BioID proximity labeling | Protein-protein interactions at centrosome | Identifying novel regulators |
| Ribo-seq | Local translation at centrioles | Studying Unkempt-mediated regulation |
| RNA-seq | Transcriptional changes | Knockout vs wild-type comparisons |
| CRISPR knockout screen | Gene essentiality for centrosome duplication | Identifying positive regulators |
| CRISPR activation screen | Gain-of-function effects | Discovering drivers of amplification |
| Western blot | Protein expression and modification | Validating PLK4 levels |
| Flow cytometry | Cell cycle profile and ploidy | Assessing consequences of amplification |
Imaging-based assays
Fluorescence microscopy of centriolar markers (e.g., CP110, Centrin) is used to quantify centrosome number and duplication status. Live-cell imaging can track duplication dynamics.
Proteomics and proximity labeling
Proximity-dependent biotinylation (BioID) identifies interactions among centrosome components, revealing regulators of centriole duplication.
RNA-seq and Ribo-seq
Transcriptomic and translatomic profiling can uncover local translation programs at the centrosome, as shown for Unkempt.
CRISPR screens
Genome-wide CRISPR knockout or activation screens can systematically identify positive regulators of centrosome duplication.
How CRISPR Can Be Used to Study GO:0010825 positive regulation of centrosome duplication
Knockout
CRISPR knockout of candidate positive regulators (e.g., PLK4, CEP152) can abolish centrosome duplication, leading to monopolar spindles and cell cycle arrest. This approach validates essentiality.
Point Mutation
Introducing patient-derived point mutations (e.g., in CEP152) via CRISPR knock-in allows functional dissection of specific residues in PLK4 recruitment and duplication.
Knock-in
Tagged knock-in of centrosomal proteins (e.g., GFP-PLK4) enables live-cell imaging and proteomic analysis of duplication dynamics.
Overexpression
CRISPR activation or cDNA overexpression of PLK4 induces centrosome amplification, modeling cancer-associated phenotypes.
How EDITGENE Supports positive regulation of centrosome duplication Research
Researchers studying positive regulation of centrosome duplication-related genes often need to determine whether a candidate gene is causally involved in driving duplication or amplification. EDITGENE provides a comprehensive suite of CRISPR-based services to enable such investigations.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of centrosome duplication research.
Frequently Asked Questions About positive regulation of centrosome duplication
What is GO:0010825?
GO:0010825 is the Gene Ontology term for positive regulation of centrosome duplication, defined as any process that increases the frequency, rate or extent of centrosome duplication.
What genes are involved in positive regulation of centrosome duplication?
Key genes include PLK4, CEP152, CEP192, Centrobin, Unkempt, and Geminin family members.
How is centrosome duplication regulated?
It is regulated by a licensing system involving CDK2-cyclin E, PLK4 activation, and post-translational modifications such as acetylation.
Why is centrosome amplification important in cancer?
Centrosome amplification leads to aneuploidy and genomic instability, promoting tumorigenesis and poor prognosis.
What diseases are associated with defects in centrosome duplication?
Microcephaly, Seckel syndrome, ciliopathies, and many cancers are linked to defects in centrosome duplication.
What experimental models are used to study positive regulation of centrosome duplication?
CRISPR knockout, point mutation knock-in, overexpression cell lines, and animal models are commonly used.
How can CRISPR screens identify regulators of centrosome duplication?
Genome-wide knockout or activation screens can systematically test each gene for its effect on centrosome number.
What is the role of PLK4 in centrosome duplication?
PLK4 is a master kinase that initiates centriole duplication and is a target for cancer therapy.
How does Unkempt regulate centrosome duplication?
Unkempt is an RNA-binding protein that controls local translation of centrosomal mRNAs, influencing centriole overduplication.
What methods are used to measure centrosome duplication?
Fluorescence microscopy, proximity labeling, RNA-seq, and Ribo-seq are commonly employed.
Conclusion
GO:0010825, positive regulation of centrosome duplication, is a critical biological process that ensures proper centrosome number and genomic stability. Dysregulation of this process contributes to cancer and developmental disorders, making its regulators attractive therapeutic targets. Continued research using CRISPR-based models and advanced omics will further elucidate the molecular mechanisms and identify new opportunities for intervention.
References
- 1. Sonnen KF et al.. 2013. Human Cep192 and Cep152 cooperate in Plk4 recruitment and centriole duplication.. J Cell Sci 126(Pt 14):3223-33 PMID: 23641073
- 2. Chan CY et al.. 2023. Polo-like kinase 4 inhibitor CFI-400945 suppresses liver cancer through cell cycle perturbation and eliciting antitumor immunity.. Hepatology 77(3):729-744 PMID: 35302667
- 3. Nigg EA. 2007. Centrosome duplication: of rules and licenses.. Trends Cell Biol 17(5):215-21 PMID: 17383880
- 4. Firat-Karalar EN et al.. 2014. Proximity interactions among centrosome components identify regulators of centriole duplication.. Curr Biol 24(6):664-70 PMID: 24613305
- 5. Ling H et al.. 2012. Suppression of centrosome duplication and amplification by deacetylases.. Cell Cycle 11(20):3779-91 PMID: 23022877
- 6. Martinez A et al.. 2025. The Unkempt RNA-binding protein reveals a local translation program in centriole overduplication.. J Cell Biol 224(8) PMID: 40699149
- 7. Ogungbenro YA et al.. 2018. Centrobin controls primary ciliogenesis in vertebrates.. J Cell Biol 217(4):1205-1215 PMID: 29440264
- 8. Arbi M et al.. 2018. Controlling centriole numbers: Geminin family members as master regulators of centriole amplification and multiciliogenesis.. Chromosoma 127(2):151-174 PMID: 29243212
