GO:0120099 procentriole replication complex: Components, Assembly and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0120099 (procentriole replication complex) is a cellular_component term describing a protein complex that acts as a chaperone or scaffold for centriolar proteins during procentriole maturation.
• The complex includes examples such as the CPAP(CENPJ)-STIL complex, CEP192-PLK4 complex, and CEP152-PLK4 complex in vertebrates.
• PLK4 is the master kinase that initiates procentriole formation, and its recruitment and activity are tightly regulated by CEP152 and CEP192.
• CDK1 activity prevents unscheduled assembly of the PLK4-STIL complex, ensuring that centriole duplication occurs only once per cell cycle.
• NEK7 is required for G1 progression and procentriole formation, linking cell cycle progression to centriole duplication.
• Deregulation of procentriole replication complex components, such as PLK4, can drive centrosome amplification and aneuploidy, contributing to cancer and other diseases [3,4].
Description
The procentriole replication complex (GO:0120099) is a protein complex that acts as a chaperone or scaffold for centriolar proteins during the maturation of the procentriole. This complex is essential for the assembly of new centrioles, which are required for proper centrosome function, mitotic spindle formation, and ciliogenesis [1,2]. The term encompasses several biochemically distinct complexes, including the CPAP(CENPJ)-STIL complex, the CEP192-PLK4 complex, and the CEP152-PLK4 complex in vertebrates. Understanding the composition and regulation of this complex is fundamental to cell biology and has direct implications for cancer, developmental disorders, and infectious diseases [3,4]. Research into the procentriole replication complex has been accelerated by advanced imaging, proteomics, and CRISPR-based genetic tools [1,5]. This article provides a comprehensive overview of the complex, its components, regulatory mechanisms, and the experimental models used to study it.
procentriole replication complex At A Glance
| GO ID | GO:0120099 |
|---|---|
| GO term | procentriole replication complex |
| Ontology | cellular_component |
| Synonym | None |
| Major function | Acts as a chaperone or scaffold for centriolar proteins during procentriole maturation |
| Example complexes | CPAP(CENPJ)-STIL complex, CEP192-PLK4 complex, CEP152-PLK4 complex |
| Key kinase | PLK4, a master regulator of centriole duplication [1,5] |
| Cell cycle link | Regulated by CDK1 to prevent unscheduled assembly |
| Disease relevance | Centrosome amplification and aneuploidy in cancer and HIV-1 infection [3,4] |
What Is GO:0120099?
The procentriole replication complex is a cellular protein complex that functions as a chaperone or scaffold for centriolar proteins during the maturation of the procentriole. Some of its members may become integrated into the growing centriole. Examples include the CPAP(CENPJ)-STIL complex, CEP192-PLK4 complex, or CEP152-PLK4 complex in vertebrates.
Why Is procentriole replication complex Important in Cell Biology?
The procentriole replication complex is critical for maintaining genomic stability because it controls the formation of new centrioles, which are essential for bipolar mitotic spindle assembly and accurate chromosome segregation [1,3]. Defects in this complex can lead to centrosome amplification, aneuploidy, and tumorigenesis, as well as developmental disorders such as microcephaly [3,4]. Moreover, pathogens such as HIV-1 can hijack components of this complex to induce centrosome amplification, highlighting its broader relevance in infectious disease [3,4]. Studying this complex provides insights into fundamental cell cycle control and offers potential therapeutic targets for cancer and other diseases [1,5].
• Maintains genomic stability by ensuring proper centriole duplication and bipolar spindle formation.
• Deregulation leads to centrosome amplification and aneuploidy, hallmarks of cancer [3,4].
• Involved in cell cycle progression, particularly G1/S transition and procentriole formation.
• Targeted by viral proteins, such as HIV-1 Vpr, to induce centrosome amplification [3,4].
• Mutations in complex components are linked to developmental disorders like microcephaly.
• Serves as a model for studying chaperone-scaffold mechanisms in organelle biogenesis.
• Provides potential targets for anti-cancer therapies aimed at centrosome amplification.
• Essential for ciliogenesis and ciliary signaling, impacting tissue homeostasis.
• Regulated by CDK1 to prevent unscheduled centriole duplication.
• Involves key kinases like PLK4 and NEK7, offering druggable targets [1,2].
What Happens During procentriole replication complex?
Initiation of Procentriole Assembly
In simple terms: The cell decides to build a new centriole, starting with the recruitment of a master kinase called PLK4.
Procentriole assembly begins with the recruitment of PLK4 to the mother centriole, a process dependent on CEP152 and CEP192. PLK4 is the master kinase that initiates centriole duplication, and its localization and activity are tightly regulated to ensure that only one new centriole forms per cycle [1,5]. CEP152 provides flexibility in Plk4 and procentriole positioning, allowing for proper spatial organization.
Scaffold Formation and Chaperone Activity
In simple terms: The complex acts like a molecular scaffold and chaperone, helping centriolar proteins assemble correctly.
The procentriole replication complex functions as a chaperone or scaffold for centriolar proteins during maturation. For example, the CPAP(CENPJ)-STIL complex facilitates the assembly of centriolar microtubules and the recruitment of other components. Some members of the complex may become integrated into the growing centriole, contributing to its structure.
Cell Cycle Regulation and Timing
In simple terms: The cell cycle clock ensures that centriole duplication happens only once, preventing extra centrioles.
CDK1 activity prevents unscheduled PLK4-STIL complex assembly, thereby restricting centriole duplication to the appropriate cell cycle phase. NEK7 is required for G1 progression and procentriole formation, linking cell cycle progression to centriole biogenesis. This tight regulation ensures that centrioles duplicate once and only once per cell cycle.
Maturation and Integration
In simple terms: The new centriole grows and matures, with some scaffold proteins becoming permanent parts of it.
During maturation, the procentriole elongation and assembly of accessory structures occur, with some complex members integrating into the growing centriole. This process involves the coordinated action of multiple proteins, including CPAP, STIL, CEP192, and PLK4. Proper maturation is essential for the centriole to function as a microtubule-organizing center.
Key Genes Involved in GO:0120099 procentriole replication complex
The following genes encode key components of the procentriole replication complex and its regulatory network.
| Gene | Major Role | Research Relevance |
|---|---|---|
| PLK4 | Master kinase initiating centriole duplication; forms complex with CEP152 and CEP192 | Target for studying centriole duplication and cancer [1,3] |
| CENPJ (CPAP) | Centriolar protein; forms complex with STIL; involved in centriole elongation | Mutations linked to microcephaly; target for centriole assembly studies |
| STIL | Forms complex with CPAP; regulates centriole duplication [1,5] | Key regulator of centriole number; CDK1 target |
| CEP152 | Recruits PLK4 to mother centriole; provides flexibility in positioning | Essential for PLK4 activation and centriole duplication |
| CEP192 | Scaffold for PLK4; forms complex with PLK4 | Important for centriole duplication and spindle assembly |
| NEK7 | Required for G1 progression and procentriole formation | Links cell cycle and centriole duplication |
| CDK1 | Prevents unscheduled PLK4-STIL assembly | Cell cycle regulator of centriole duplication |
| TBCD | Links centriologenesis, spindle microtubule dynamics, and midbody abscission | Role in centriole biogenesis and cytokinesis |
| VprBP (DCAF1) | Component of HIV-1 Vpr•VprBP•Plk4 complex [3,4] | Mediates HIV-1-induced centrosome amplification [3,4] |
| Vpr | HIV-1 protein that hijacks VprBP and PLK4 [3,4] | Viral factor inducing centrosome amplification [3,4] |
| SAS-6 | Core centriolar protein; not directly in complex but downstream | Conserved centriole assembly factor |
| CEP135 | Centriolar protein involved in centriole assembly | Component of centriole duplication machinery |
| CEP63 | Centriolar protein required for centriole duplication | Associated with microcephaly and cancer |
| CEP120 | Centriolar protein involved in centriole elongation | Mutations linked to developmental disorders |
| MCPH1 | Microcephaly protein; regulates centriole duplication | Disease relevance in microcephaly |
| WDR62 | Centrosomal protein; involved in centriole biogenesis | Mutations cause microcephaly |
| PLK1 | Regulates centriole disengagement and maturation | Cell cycle kinase with roles in centriole cycle |
| Aurora A | Centrosomal kinase; regulates centriole maturation | Target for cancer therapy |
How Is procentriole replication complex Regulated?
The procentriole replication complex is regulated by cell cycle kinases, particularly CDK1 and PLK4 [1,5]. CDK1 activity prevents unscheduled PLK4-STIL complex assembly, ensuring that centriole duplication occurs only once per cell cycle. PLK4 itself is subject to autoregulation and is targeted for degradation by the SCF ubiquitin ligase complex. NEK7 is required for G1 progression and procentriole formation, linking cell cycle progression to centriole duplication. Additionally, viral proteins such as HIV-1 Vpr can hijack the complex by forming a Vpr•VprBP•Plk4 complex, leading to centrosome amplification [3,4].
procentriole replication complex and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| PLK4 | Centrosome amplification, cancer [3,4] | Knockout and overexpression cell lines; xenograft models |
| CENPJ (CPAP) | Microcephaly, Seckel syndrome | Patient-derived iPSCs; knockout mice |
| STIL | Microcephaly | Knockout cell lines; zebrafish models |
| CEP152 | Microcephaly, cancer | Knockout and knock-in cell lines |
| VprBP (DCAF1) | HIV-1 pathogenesis, cancer [3,4] | Knockout T cells; HIV-1 infection models |
Cancer and Centrosome Amplification
Deregulation of procentriole replication complex components, particularly PLK4, leads to centrosome amplification, aneuploidy, and tumorigenesis [3,4]. HIV-1 infection can induce centrosome amplification through the Vpr•VprBP•Plk4 complex in CD4+ T cells, contributing to genomic instability [3,4]. Targeting this complex may offer therapeutic strategies for cancers with centrosome amplification.
Developmental Disorders
Mutations in genes encoding complex components, such as CENPJ (CPAP), CEP152, and STIL, are associated with microcephaly and other developmental disorders. These mutations impair centriole duplication and lead to reduced centrosome numbers, affecting neurodevelopment.
Infectious Diseases
HIV-1 Vpr hijacks the host protein VprBP and PLK4 to form a complex that induces centrosome amplification and aneuploidy in CD4+ T cells, potentially contributing to viral pathogenesis and immune dysfunction [3,4].
From procentriole replication complex-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate procentriole duplication? | CRISPR knockout cell lines (e.g., HeLa, HEK293T) |
| Does mutation Y affect PLK4 binding to CEP152? | Point mutation knock-in cell lines |
| How does gene X localize during centriole duplication? | Tagged knock-in (e.g., GFP) cell lines |
| Does overexpression of PLK4 cause centrosome amplification? | Overexpression cell lines and mouse models [3,4] |
| What is the role of NEK7 in G1 progression? | Knockout and rescue cell lines |
| How does HIV-1 Vpr induce centrosome amplification? | Vpr-expressing T cell lines and primary CD4+ T cells [3,4] |
How to Study the procentriole replication complex Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Electron microscopy | Centriole structure and duplication | Visualizing procentriole assembly |
| Immunofluorescence | Protein localization and complex assembly | Co-localization of PLK4, CEP152, STIL |
| Proximity labeling (BioID) | Protein-protein interactions in vivo | Mapping complex components |
| CRISPR knockout screens | Gene essentiality for centriole duplication | Identifying novel complex regulators |
| CRISPR point mutation | Specific protein domain functions | Dissecting PLK4-STIL interaction |
| Flow cytometry | Cell cycle progression and ploidy | Analyzing NEK7 role in G1 |
| Live-cell imaging | Real-time dynamics of complex assembly | Tracking GFP-PLK4 recruitment |
Imaging and Electron Microscopy
Whole-mount electron microscopy has been used to determine the centriole cycle in Chinese hamster ovary cells. Immunofluorescence and live-cell imaging with tagged proteins (e.g., GFP-PLK4) allow visualization of procentriole replication complex assembly in real time.
Proteomics and Interaction Studies
Affinity purification coupled with mass spectrometry can identify components of the procentriole replication complex and their interactions. Proximity labeling approaches (e.g., BioID) can map the complex in living cells.
Genetic Screens and CRISPR
CRISPR knockout screens can identify genes required for procentriole duplication and complex assembly. Point mutations can be introduced to dissect specific protein-protein interactions, such as PLK4-STIL binding.
Cell Cycle Analysis
Flow cytometry and synchronization methods are used to study cell cycle regulation of the complex, including CDK1-dependent control. NEK7 knockout studies have linked G1 progression to procentriole formation.
How CRISPR Can Be Used to Study GO:0120099 procentriole replication complex
Knockout
CRISPR knockout of genes encoding procentriole replication complex components (e.g., PLK4, CENPJ, STIL) results in centriole duplication failure, centrosome loss, and cell cycle arrest. These models are essential for studying the function of individual complex members and their contribution to centriole biogenesis.
Point Mutation
Point mutations can be introduced to disrupt specific protein-protein interaction domains, such as the PLK4 kinase domain or the STIL coiled-coil domain, to dissect their roles in complex assembly and centriole duplication. For example, mutation of CDK1 phosphorylation sites on STIL prevents unscheduled assembly.
Knock-in
Knock-in of tagged versions (e.g., GFP, HaloTag) of complex components allows real-time imaging of their localization and dynamics during procentriole maturation. Knock-in of disease-associated mutations (e.g., CENPJ microcephaly mutations) provides models for studying developmental disorders.
Overexpression
Overexpression of PLK4 or other complex components induces centrosome amplification and aneuploidy, modeling cancer-associated phenotypes [3,4]. These models are useful for testing drugs that target centrosome amplification.
How EDITGENE Supports procentriole replication complex Research
Researchers studying procentriole replication complex-related genes often need to determine whether a candidate gene is causally involved in centriole duplication, centrosome amplification, or related diseases. EDITGENE provides a comprehensive suite of CRISPR-based services to accelerate this research, from gene knockout to precise point mutations and knock-in tagging.
Contact EDITGENE today to design your custom CRISPR model for procentriole replication complex research.
Frequently Asked Questions About procentriole replication complex
What is the procentriole replication complex?
The procentriole replication complex (GO:0120099) is a protein complex that acts as a chaperone or scaffold for centriolar proteins during the maturation of the procentriole.
What genes are involved in the procentriole replication complex?
Key genes include PLK4, CENPJ (CPAP), STIL, CEP152, CEP192, and NEK7, among others [1,2].
What is the function of GO:0120099?
It functions as a chaperone or scaffold for centriolar proteins during procentriole maturation, with some members integrating into the growing centriole.
How is the procentriole replication complex regulated?
It is regulated by cell cycle kinases such as CDK1 and PLK4, and by proteins like NEK7 [1,2,5].
What diseases are associated with the procentriole replication complex?
Deregulation is linked to cancer, microcephaly, and HIV-1 pathogenesis [1,3,4].
What are the example complexes in GO:0120099?
Examples include the CPAP(CENPJ)-STIL complex, CEP192-PLK4 complex, and CEP152-PLK4 complex.
How can I study the procentriole replication complex?
Using CRISPR knockout, point mutation, knock-in tagging, overexpression, and advanced imaging techniques [1,5].
What is the role of PLK4 in the procentriole replication complex?
PLK4 is the master kinase that initiates centriole duplication and forms complexes with CEP152 and CEP192.
What is the role of NEK7 in procentriole formation?
NEK7 is required for G1 progression and procentriole formation.
How does HIV-1 affect the procentriole replication complex?
HIV-1 Vpr forms a complex with VprBP and PLK4, leading to centrosome amplification and aneuploidy [3,4].
Conclusion
The procentriole replication complex (GO:0120099) is a critical cellular machinery for centriole duplication, acting as a chaperone and scaffold for centriolar proteins. Its precise regulation by cell cycle kinases ensures genomic stability, and its deregulation contributes to cancer, developmental disorders, and infectious diseases [1,3,4]. Advances in CRISPR-based models and imaging technologies continue to unravel the molecular details of this complex, offering new avenues for therapeutic intervention [1,5].
References
- 1. Sullenberger C et al.. 2023. Centrosomal organization of Cep152 provides flexibility in Plk4 and procentriole positioning.. J Cell Biol 222(12) PMID: 37707473
- 2. Gupta A et al.. 2017. NEK7 is required for G1 progression and procentriole formation.. Mol Biol Cell 28(15):2123-2134 PMID: 28539406
- 3. Park JE et al.. 2024. Centrosome amplification and aneuploidy driven by the HIV-1-induced Vpr•VprBP•Plk4 complex in CD4(+) T cells.. Nat Commun 15(1):2017 PMID: 38443376
- 4. Park JE et al.. 2023. Centrosome amplification and aneuploidy driven by the HIV-1-induced Vpr•VprBP•Plk4 complex in CD4(+) T cells.. Res Sq PMID: 37645926
- 5. Zitouni S et al.. 2016. CDK1 Prevents Unscheduled PLK4-STIL Complex Assembly in Centriole Biogenesis.. Curr Biol 26(9):1127-37 PMID: 27112295
- 6. Fanarraga ML et al.. 2010. TBCD links centriologenesis, spindle microtubule dynamics, and midbody abscission in human cells.. PLoS One 5(1):e8846 PMID: 20107510
- 8. Kuriyama R et al.. 1981. Centriole cycle in Chinese hamster ovary cells as determined by whole-mount electron microscopy.. J Cell Biol 91(3 Pt 1):814-21 PMID: 7328123
