GO:0097742 de novo centriole assembly: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0097742 de novo centriole assembly describes the formation of a centriole without a pre-existing template, distinct from canonical duplication.
• The process is best studied in multiciliated epithelial cells, where hundreds of centrioles are generated via the deuterosome pathway to nucleate motile cilia.
• PLK4 is the master kinase that triggers de novo centriole biogenesis and maturation, even in cells lacking existing centrioles.
• De novo assembly is error-prone and can produce structurally aberrant centrioles, as shown in human cells.
• Key model systems include Naegleria, heat-shocked mammalian cells, and multiciliated airway epithelia.
• Dysregulation of de novo centriole assembly is linked to ciliopathies, cancer, and developmental disorders.
Description
Centrioles are microtubule-based structures essential for centrosome function, cilia formation, and cell division. Canonical centriole duplication occurs once per cell cycle, templated by a pre-existing mother centriole. In contrast, de novo centriole assembly (GO:0097742) generates centrioles without a pre-existing template, a process critical for multiciliated cells that must produce hundreds of centrioles to nucleate motile cilia. This process is also observed during parthenogenesis in some insects and in Naegleria, where basal bodies form de novo. Understanding de novo centriole assembly is essential because it underlies the biogenesis of motile cilia, whose dysfunction causes primary ciliary dyskinesia and other ciliopathies. Moreover, de novo centriole formation is error-prone and can lead to genomic instability, making it relevant to cancer and developmental disorders. Recent studies have identified key regulators such as PLK4 and MCIDAS, which orchestrate the massive amplification of centrioles in multiciliated cells. This article synthesizes current knowledge on the molecular mechanisms, key genes, and research methods for studying GO:0097742, providing a resource for researchers investigating centriole biology and cilia-related diseases.
de novo centriole assembly At A Glance
| GO ID | GO:0097742 |
|---|---|
| GO term | de novo centriole assembly |
| Ontology | biological_process |
| Synonym | multiciliogenesis, de novo basal body assembly, acentriolar basal body biogenesis |
| Major function | Formation of centrioles without a pre-existing template, enabling multiciliation and cilia assembly |
| Key regulator | PLK4 kinase triggers de novo centriole biogenesis and maturation |
| Model systems | Multiciliated epithelial cells, Naegleria, heat-shocked mammalian cells |
| Related disease | Ciliopathies, primary ciliary dyskinesia, cancer |
What Is GO:0097742?
GO:0097742 de novo centriole assembly is the biological process by which a centriole arises without replication from an existing centriole. Unlike templated duplication, this process can occur via different mechanisms, such as the deuterosome pathway in multiciliated epithelial cells and during parthenogenesis in some insects. It encompasses the formation of a new centriole from amorphous precursors, often in large numbers, to support specialized cellular functions like motile cilia assembly.
Why Is de novo centriole assembly Important in Cell Biology?
De novo centriole assembly is essential for the development of multiciliated cells, which line the respiratory tract, brain ventricles, and reproductive organs. Defects in this process lead to impaired mucociliary clearance, hydrocephalus, and infertility, as seen in primary ciliary dyskinesia and other ciliopathies. Additionally, de novo centriole formation is error-prone and can generate extra centrosomes, contributing to chromosomal instability and cancer. Understanding the molecular mechanisms of GO:0097742 provides insights into fundamental cell biology and offers potential therapeutic targets for cilia-related diseases and cancer.
• Enables multiciliated cells to produce hundreds of centrioles for motile cilia, essential for airway clearance and cerebrospinal fluid flow.
• Dysregulation leads to ciliopathies such as primary ciliary dyskinesia, characterized by chronic respiratory infections and infertility.
• De novo centriole formation is error-prone and can cause centrosome amplification, a hallmark of many cancers.
• PLK4, the master regulator, is a potential drug target for cancers with centrosome amplification.
• MCIDAS couples transcription with massive centriole biogenesis, linking cell cycle and differentiation.
• Model organisms like Naegleria provide evolutionary insights into basal body assembly.
• Heat-shocked mammalian cells offer a tractable system to study de novo assembly kinetics.
• Bicentriole formation reveals alternative 3D architectures of de novo assembly.
• Understanding de novo assembly may inform regenerative medicine for ciliated tissues.
• Research on GO:0097742 helps explain parthenogenesis and unusual reproductive strategies in insects.
What Happens During de novo centriole assembly?
Initiation by PLK4
In simple terms: PLK4 acts as the master switch that starts the formation of a new centriole from scratch.
De novo centriole assembly is initiated by the kinase PLK4, which localizes to amorphous precursors and triggers the recruitment of downstream components. In cells lacking pre-existing centrioles, PLK4 overexpression is sufficient to drive autonomous de novo biogenesis and maturation of centrioles. PLK4 phosphorylates substrates that promote the assembly of the cartwheel structure, a key early step in centriole formation.
Cartwheel and procentriole formation
In simple terms: A cartwheel-like structure forms first, providing a scaffold for the new centriole.
Following PLK4 activation, SAS-6 and STIL assemble into a cartwheel structure that defines the ninefold symmetry of the centriole. However, in human cells, de novo centriole formation can occur independently of SAS-6 self-assembly, suggesting alternative pathways. The cartwheel then recruits CPAP and CEP135 to form the procentriole, which elongates into a mature centriole.
Deuterosome pathway in multiciliated cells
In simple terms: In cells with many cilia, centrioles are made in bulk on specialized platforms called deuterosomes.
Multiciliated epithelial cells utilize the deuterosome pathway to generate hundreds of centrioles de novo. Deuterosomes are electron-dense structures that serve as assembly platforms, recruiting PLK4, CEP152, and other components to nucleate multiple centrioles simultaneously. MCIDAS regulates this process by translocating from the nucleus to the cytoplasm, coupling transcriptional activation with massive centriole biogenesis.
Maturation and basal body docking
In simple terms: Newly formed centrioles mature and then dock at the cell surface to become basal bodies that grow cilia.
After formation, procentrioles elongate and mature by acquiring accessory structures such as subdistal and distal appendages. Mature centrioles then migrate to the apical membrane and dock as basal bodies, initiating ciliogenesis. In Naegleria, de novo basal body assembly occurs during differentiation, providing a classic model for studying this process.
Kinetics and error-prone nature
In simple terms: De novo assembly is slower and more error-prone than templated duplication, often producing abnormal centrioles.
Kinetic analyses in heat-shocked mammalian cells reveal that de novo centriole assembly is a multistep process with distinct temporal phases. In human cells, de novo formation is error-prone, generating centrioles with structural abnormalities and variable numbers, which can lead to centrosome amplification. This error-prone nature contrasts with the high fidelity of templated duplication, highlighting the need for robust regulatory mechanisms.
Key Genes Involved in GO:0097742 de novo centriole assembly
The following genes and proteins are central to de novo centriole assembly, as supported by published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| PLK4 | Master kinase initiating de novo centriole biogenesis | Target for studying initiation and centrosome amplification |
| MCIDAS | Transcription factor coupling cell cycle exit with centriole amplification | Key regulator in multiciliated cell differentiation |
| SAS-6 | Cartwheel component establishing ninefold symmetry | Essential for canonical assembly, but de novo can occur without self-assembly |
| STIL | Cartwheel component interacting with SAS-6 | Required for procentriole formation |
| CPAP | Microtubule-binding protein for centriole elongation | Mutations cause microcephaly and ciliopathies |
| CEP152 | Recruits PLK4 to assembly sites | Scaffold for deuterosome pathway |
| CEP135 | Cartwheel and centriole structural protein | Marker for procentriole formation |
| CCP110 | Distal appendage component | Involved in maturation and docking |
| CEP97 | Distal appendage protein | Required for cilia formation |
| OFD1 | Centriole and cilia protein | Mutations cause oral-facial-digital syndrome |
| POC1A | Centriolar protein | Mutations cause SOFT syndrome |
| CEP63 | Centrosome component | Mutations cause Seckel syndrome |
| CEP120 | Centriole assembly factor | Mutations cause ciliopathies |
| WDR62 | Centrosome protein | Mutations cause microcephaly |
| MCPH1 | Centrosome regulation | Mutations cause primary microcephaly |
| Deup1 | Deuterosome component | Essential for deuterosome-mediated assembly |
| CCDC78 | Centriole and cilia protein | Mutations cause ciliopathies |
How Is de novo centriole assembly Regulated?
De novo centriole assembly is tightly regulated at multiple levels. PLK4 activity is controlled by autophosphorylation and degradation, ensuring proper timing and number of centrioles. MCIDAS is regulated by nuclear-cytoplasmic translocation, linking transcriptional programs to centriole amplification. In multiciliated cells, Notch signaling and cell cycle exit trigger the expression of key regulators like MCIDAS and PLK4. Additionally, the error-prone nature of de novo assembly suggests the existence of quality control mechanisms that monitor centriole structure and number. Post-translational modifications, including phosphorylation by PLK4, are critical for assembly initiation and progression.
de novo centriole assembly and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| PLK4 | Cancer, centrosome amplification | PLK4 overexpression in cell lines; KO in multiciliated cells |
| MCIDAS | Primary ciliary dyskinesia | MCIDAS KO in airway epithelial cells |
| CPAP | Microcephaly, Seckel syndrome | Patient-derived iPSCs with point mutations |
| CEP152 | Seckel syndrome | CEP152 KO in zebrafish or mouse models |
| STIL | Microcephaly | STIL KO in neural progenitors |
Ciliopathies and Primary Ciliary Dyskinesia
Defects in de novo centriole assembly impair the formation of motile cilia, leading to primary ciliary dyskinesia (PCD), characterized by chronic respiratory infections, situs inversus, and infertility. Mutations in genes such as MCIDAS, PLK4, and CPAP disrupt centriole amplification in multiciliated cells, causing reduced ciliary beating and mucociliary clearance failure. Other ciliopathies, including hydrocephalus and polycystic kidney disease, are also linked to centriole assembly defects.
Cancer and Centrosome Amplification
De novo centriole assembly is error-prone and can generate extra centrosomes, a hallmark of many cancers. Overexpression of PLK4 induces de novo centriole formation and centrosome amplification, leading to chromosomal instability and tumorigenesis. Targeting PLK4 or other assembly factors is a potential therapeutic strategy for cancers with centrosome amplification.
Developmental Disorders and Microcephaly
Mutations in centriole assembly genes such as CPAP, CEP152, and STIL cause microcephaly and Seckel syndrome, characterized by reduced brain size and growth retardation. These disorders highlight the importance of proper centriole biogenesis in neural progenitor proliferation and differentiation.
From de novo centriole assembly-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate de novo centriole assembly? | Knockout of gene X in multiciliated epithelial cells |
| What is the effect of a disease-associated point mutation? | Point mutation knock-in in cell lines |
| How does a tag affect protein localization? | Tagged knock-in of gene X with GFP |
| Can overexpression drive de novo assembly? | Overexpression of PLK4 or MCIDAS |
| What is the kinetics of de novo assembly? | Heat-shocked mammalian cells |
| How does gene X affect cilia formation? | Knockout in Naegleria or zebrafish |
How to Study the de novo centriole assembly Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Live-cell imaging | Dynamics of centriole assembly | Tracking PLK4 recruitment and procentriole formation |
| Electron microscopy | Ultrastructure of centrioles and deuterosomes | Visualizing de novo assembly intermediates |
| RNA-seq | Transcriptional changes during multiciliation | Identifying MCIDAS targets |
| CRISPR screen | Genes required for centriole assembly | Discovering novel regulators |
| Proteomics | Protein composition of assembly intermediates | Identifying deuterosome components |
| Kinase assay | PLK4 activity and substrate phosphorylation | Studying initiation mechanisms |
| Centriole counting | Number of centrioles per cell | Assessing de novo assembly efficiency |
| Cilia beating assay | Functional cilia formation | Linking assembly to ciliary function |
Imaging-Based Approaches
Fluorescence microscopy, including live-cell imaging, is essential to visualize de novo centriole assembly. Markers such as GFP-PLK4, Centrin-GFP, and SAS-6-GFP allow tracking of centriole formation in real time. Electron microscopy provides ultrastructural details of deuterosomes and procentrioles.
Genomic and Transcriptomic Methods
RNA-seq and single-cell RNA-seq can identify transcriptional programs driving multiciliation, including MCIDAS targets. CRISPR screens can uncover novel regulators of de novo centriole assembly by assessing centriole number or cilia formation.
Proteomic and Biochemical Assays
Proteomics of isolated centrioles or deuterosomes can identify components and post-translational modifications. Kinase assays for PLK4 and its substrates reveal regulatory mechanisms.
Functional Perturbation
Knockout, knockdown, or overexpression of candidate genes in cell culture models (e.g., multiciliated epithelial cells, HeLa) followed by centriole counting and cilia beating assays can determine function.
How CRISPR Can Be Used to Study GO:0097742 de novo centriole assembly
Knockout
CRISPR knockout of genes such as PLK4, MCIDAS, or SAS-6 in multiciliated cells abolishes de novo centriole assembly, leading to loss of cilia. This approach is used to determine essentiality and identify downstream effects.
Point Mutation
Introducing disease-associated point mutations (e.g., in CPAP or STIL) via CRISPR allows study of their impact on centriole assembly and cilia function, providing insights into ciliopathies.
Knock-in
Tagged knock-in of centriolar proteins (e.g., GFP-PLK4) enables real-time visualization of de novo assembly dynamics and protein localization.
Overexpression
CRISPR activation or cDNA overexpression of PLK4 or MCIDAS induces de novo centriole amplification, useful for studying the sufficiency of these factors and for modeling centrosome amplification in cancer.
How EDITGENE Supports de novo centriole assembly Research
Researchers studying de novo centriole assembly-related genes often need to determine whether a candidate gene is causally involved in centriole formation, cilia biogenesis, or disease. EDITGENE provides comprehensive CRISPR-based services to accelerate this research, from gene knockout to precise point mutations and knock-in models.
Contact EDITGENE today to design your custom CRISPR model for de novo centriole assembly research.
Frequently Asked Questions About de novo centriole assembly
What is de novo centriole assembly?
De novo centriole assembly (GO:0097742) is the formation of a centriole without a pre-existing template, often occurring in multiciliated cells to generate many centrioles for cilia.
What genes are involved in de novo centriole assembly?
Key genes include PLK4, MCIDAS, SAS-6, STIL, CPAP, and CEP152, among others.
How is de novo centriole assembly different from centriole duplication?
Duplication uses a mother centriole as a template, while de novo assembly starts from amorphous precursors without a template.
Which cells use de novo centriole assembly?
Multiciliated epithelial cells, Naegleria, and some insect cells during parthenogenesis.
What is the role of PLK4 in de novo centriole assembly?
PLK4 is the master kinase that initiates de novo centriole biogenesis and maturation.
What diseases are linked to defects in de novo centriole assembly?
Ciliopathies such as primary ciliary dyskinesia, microcephaly, and cancer.
How can I study de novo centriole assembly in the lab?
Use imaging with fluorescent markers, CRISPR knockouts, and functional assays in multiciliated cells.
What is the deuterosome pathway?
A mechanism in multiciliated cells where deuterosomes act as platforms for simultaneous assembly of many centrioles.
Is de novo centriole assembly error-prone?
Yes, in human cells it is error-prone and can produce abnormal centrioles, leading to centrosome amplification.
What model organisms are used to study de novo centriole assembly?
Naegleria, Xenopus, zebrafish, and mammalian cell cultures, including heat-shocked cells.
Conclusion
De novo centriole assembly (GO:0097742) is a fundamental process for generating centrioles without a template, essential for multiciliation and cilia function. Dysregulation of this process leads to ciliopathies, developmental disorders, and cancer. Key regulators such as PLK4 and MCIDAS have been identified, and advanced CRISPR and imaging tools now allow detailed mechanistic studies. Continued research on de novo centriole assembly will provide insights into basic cell biology and potential therapeutic targets for related diseases.
References
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- 2. Gönczy P et al.. 2019. Centriole assembly at a glance.. J Cell Sci 132(4) PMID: 30787112
- 3. Lu H et al.. 2025. Nuclear-cytoplasmic translocation of MCIDAS couples transcription with massive de novo centriole biogenesis in multiciliated cells.. Cell Rep 44(10):116321 PMID: 40974574
- 4. Baek IK et al.. 2017. Kinetic analysis of de novo centriole assembly in heat-shocked mammalian cells.. Cytoskeleton (Hoboken) 74(1):18-28 PMID: 27935233
- 5. Gomes Pereira S et al.. 2021. The 3D architecture and molecular foundations of de novo centriole assembly via bicentrioles.. Curr Biol 31(19):4340-4353.e7 PMID: 34433076
- 6. Fritz-Laylin LK et al.. 2016. Naegleria: a classic model for de novo basal body assembly.. Cilia 5:10 PMID: 27047659
- 7. Wang WJ et al.. 2015. De novo centriole formation in human cells is error-prone and does not require SAS-6 self-assembly.. Elife 4 PMID: 26609813
