GO:0061511 centriole elongation: Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0061511 centriole elongation is the biological process by which a centriole increases in length as part of centrosome organization and replication.
• Centriole elongation is a tightly regulated, stepwise process that converts a short cartwheel-containing procentriole into a mature, microtubule-based centriole of defined length.
• Core regulators include SAS-6, PLK4, CPAP, CEP135, CEP97, CP110, Ana1/Cep295, and CDK1, which coordinate cartwheel assembly, microtubule growth, and length restriction.
• Dysregulated centriole elongation is linked to developmental patterning defects, ciliogenesis failure, plasma cell disorders, and cancer-relevant centrosome amplification.
• Centriole elongation can be studied using high-throughput electron tomography, live-cell imaging of centriole markers, and targeted CRISPR perturbation of elongation genes.
• CRISPR knockout, point mutation, knock-in, and overexpression models enable causal testing of candidate elongation genes in human cells.
Description
Centriole elongation (GO:0061511) is the centrosome organization process by which a centriole increases in length as part of the process of replication. Centrioles are microtubule-based structures that form the core of centrosomes and the basal bodies of cilia and flagella, and their length must be precisely controlled to support normal cell division, signaling, and ciliogenesis. Because centriole length is tightly coupled to duplication and cell-cycle progression, elongation is not a passive growth event but a regulated assembly program that integrates cartwheel components, microtubule-associated proteins, and cell-cycle kinases. Researchers study centriole elongation to understand fundamental mechanisms of organelle size control and to explain how centriole over-elongation or under-elongation contributes to human disease. Defects in centriole length control have been observed in plasma cell disorders and have been linked to ciliogenesis and developmental patterning defects, making elongation a relevant process for cancer biology, developmental biology, and ciliopathy research. The process is experimentally tractable in human cells using synchronized duplication assays, marker-based imaging, and CRISPR-based perturbation of candidate genes. This article summarizes the authoritative GO definition, the molecular machinery and regulatory logic of centriole elongation, the genes and proteins involved, disease connections, and the experimental methods used to study this process.
centriole elongation At A Glance
| GO ID | GO:0061511 |
|---|---|
| GO term | centriole elongation |
| Ontology | biological_process |
| Synonym | none listed in QuickGO |
| Definition | The centrosome organization process by which a centriole increases in length as part of the process of replication. |
| Major function | Regulated lengthening of a centriole during duplication to establish a mature centriole of defined length. |
| Related process | Centriole duplication, centrosome organization, and ciliogenesis. |
| Key regulators | PLK4, SAS-6, CPAP, CEP135, CEP97, CP110, Ana1/Cep295, CDK1. |
| Disease relevance | Centriole over-elongation in plasma cell disorders; links to ciliogenesis and developmental patterning defects. |
What Is GO:0061511?
In the context of GO:0061511, centriole elongation is defined as the centrosome organization process by which a centriole increases in length as part of the process of replication. This definition places elongation within the broader cycle of centriole duplication, where a new procentriole assembles adjacent to a mother centriole and then extends its microtubule-based structure to reach a species-specific length. The term captures the regulated growth phase rather than the initial cartwheel assembly or the final maturation steps, and it is distinct from centriole over-elongation or abnormal length phenotypes that can arise when regulatory constraints fail.
Why Is centriole elongation Important in Cell Biology?
Centriole elongation is important because centriole length determines centrosome function, cilia assembly competence, and the fidelity of cell division, and its dysregulation is associated with human disease. The process is a paradigm for organelle size control, requiring coordination between cartwheel assembly, microtubule growth, and length-restricting factors. Understanding centriole elongation provides mechanistic insight into how cells build and maintain a structure of defined dimensions and how errors in this process contribute to developmental defects and plasma cell disorders.
• Defines centriole length, which is critical for centrosome function and bipolar spindle assembly.
• Required for normal ciliogenesis and developmental patterning.
• Dysregulated elongation is an early event in plasma cell disorders.
• Provides a model for organelle size control and regulated microtubule growth.
• Involves cell-cycle kinases such as CDK1, linking elongation to cell-cycle progression.
• Centriole over-elongation can be detected by high-throughput electron tomography.
• Elongation defects can impair centriole duplication and centrosome organization.
• Targeting elongation regulators is relevant to cancer and ciliopathy research.
• CRISPR-based models enable causal testing of elongation genes in human cells.
• Elongation is coupled to transition zone migration and postaxonemal centriole elongation in specialized contexts.
What Happens During centriole elongation?
Initiation of procentriole elongation
In simple terms: A new centriole starts to grow next to the mother centriole after the cartwheel is built.
Centriole elongation begins after procentriole assembly, when the cartwheel and associated proteins establish a platform for microtubule growth. PLK4 and SAS-6 are central to this early stage, with SAS-6 forming the cartwheel that templates the ninefold symmetry of the centriole. Ana1/Cep295 has been shown to regulate centriole elongation via Cep135 and microtubules, indicating that specific scaffold proteins are required to initiate and sustain elongation. The transition from cartwheel assembly to elongation is a regulated step that determines whether the procentriole will mature to the correct length.
Microtubule growth and centriole extension
In simple terms: The centriole gets longer as microtubules are added and stabilized.
During elongation, centriolar microtubules are added and stabilized to increase centriole length. CPAP is a key centriole length regulator that promotes microtubule growth and is subject to tight control to prevent over-elongation. CEP135 and Ana1/Cep295 cooperate in this process, with Ana1/Cep295 regulating elongation via Cep135 and microtubules. The growth phase is coordinated with the cell cycle so that centriole length is matched to the stage of duplication.
Length restriction and termination
In simple terms: The cell uses brakes to stop the centriole from growing too long.
Centriole elongation is terminated by length-restricting factors that prevent over-elongation. CEP97 and CP110 form a complex at the distal end of the centriole that limits microtubule growth, and CDK1 and CEP97 cooperatively control centriole length to orchestrate ciliogenesis and developmental patterning. Loss of these restraints leads to centriole over-elongation, which has been observed as an early event in plasma cell disorders. The balance between growth-promoting and growth-restricting factors determines final centriole length.
Coupling to duplication and cell cycle
In simple terms: Elongation happens on a schedule tied to the cell cycle.
Centriole elongation is part of the replication process and is coupled to cell-cycle progression. CDK1 activity is required for proper length control, linking elongation to mitotic entry and ciliogenesis decisions. Ana1/Cep295 interactions with N- and C-terminal parts permit centriole duplication but not elongation in certain mutant contexts, showing that duplication and elongation can be genetically separated. This coupling ensures that each daughter cell receives a correctly sized centriole pair.
Specialized elongation contexts
In simple terms: In some cells, centrioles elongate in unusual ways to build specialized cilia.
Beyond canonical duplication, centriole elongation can occur in specialized contexts such as transition zone migration and postaxonemal centriole elongation, which are mechanisms for cytoplasmic ciliogenesis. These specialized modes highlight the flexibility of the elongation machinery and its integration with cilia assembly. Studying these contexts provides insight into how elongation is repurposed for different cellular functions.
Key Genes Involved in GO:0061511 centriole elongation
The following genes and proteins are central to centriole elongation, based on published literature on centriole length control, duplication, and ciliogenesis.
| Gene | Major Role | Research Relevance |
|---|---|---|
| PLK4 | Master kinase for centriole duplication and elongation initiation | Target for studying duplication control and centriole number |
| SAS-6 | Cartwheel component that templates centriole symmetry | Key for understanding early elongation steps |
| CPAP | Centriole length regulator promoting microtubule growth | Central to length control and over-elongation studies |
| CEP135 | Microtubule-associated protein involved in elongation | Partner of Ana1/Cep295 in elongation |
| CEP97 | Length-restricting factor at the distal end | Studied with CDK1 for length control |
| CP110 | Distal cap protein limiting centriole growth | Marker for length restriction and ciliogenesis |
| Ana1/Cep295 | Regulates elongation via Cep135 and microtubules | Genetic separation of duplication and elongation |
| CDK1 | Cell-cycle kinase controlling centriole length | Links elongation to cell-cycle progression |
| CEP152 | Centriole duplication and elongation scaffold | Relevant to centrosome organization |
| STIL | Cartwheel assembly factor | Studied in duplication and elongation initiation |
| CEP192 | Centrosome scaffold for PLK4 recruitment | Upstream regulator of duplication |
| SAS-4 | Cartwheel component | Core structural protein of the centriole |
| CEP120 | Centriole length and duplication regulator | Candidate for elongation studies |
| WDR62 | Centrosome protein linked to centriole function | Relevant to developmental defects |
| OFD1 | Centriole distal appendage and length control | Ciliopathy-related gene |
| MCPH1 | Centrosome regulation and cell-cycle control | Microcephaly-related gene |
| Cep97 | Length restriction in Drosophila and human cells | Model for over-elongation studies |
How Is centriole elongation Regulated?
Centriole elongation is regulated by a balance of growth-promoting and growth-restricting factors, with cell-cycle kinases providing temporal control. CDK1 and CEP97 cooperatively control centriole length to orchestrate ciliogenesis and developmental patterning, indicating that phosphorylation and distal cap proteins are key regulatory nodes. PLK4 activity initiates duplication and influences elongation, while CPAP promotes microtubule growth and is restrained to prevent over-elongation. Ana1/Cep295 regulates elongation via Cep135 and microtubules, and its interactions can separate duplication from elongation genetically. In specialized contexts, transition zone migration and postaxonemal centriole elongation provide additional regulatory layers for ciliogenesis.
centriole elongation and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CEP97 | Ciliogenesis and developmental patterning defects | Knockout and point-mutation models in human cells |
| CDK1 | Cell-cycle and ciliogenesis defects | Inducible knockout and kinase-dead knock-in |
| CPAP | Centriole over-elongation and centrosome amplification | Overexpression and knockout models |
| Ana1/Cep295 | Duplication versus elongation defects | Separation-of-function mutants |
| PLK4 | Centrosome amplification and cancer | Overexpression and conditional knockout |
Centriole over-elongation in plasma cell disorders
High-throughput electron tomography has identified centriole over-elongation as an early event in plasma cell disorders, suggesting that dysregulated elongation contributes to disease pathogenesis. This finding links centriole length control to hematological disease and provides a rationale for studying elongation regulators in plasma cell biology.
Ciliogenesis and developmental patterning defects
CDK1 and CEP97 cooperatively control centriole length to orchestrate ciliogenesis and developmental patterning, and their disruption can lead to patterning defects. Because cilia are essential for developmental signaling, defects in centriole elongation can impair tissue patterning and organogenesis.
Cancer and centrosome amplification
Centriole elongation is part of centrosome organization, and errors in centriole length control can contribute to centrosome amplification, a hallmark of many cancers. Targeting elongation regulators such as PLK4 and CPAP is an active area of cancer research.
Ciliopathies and specialized elongation defects
Specialized modes of centriole elongation, including transition zone migration and postaxonemal centriole elongation, are important for cytoplasmic ciliogenesis, and their disruption may contribute to ciliopathy-related phenotypes. Understanding these pathways may reveal new disease mechanisms.
From centriole elongation-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is a candidate gene required for centriole elongation? | CRISPR knockout in human cells with marker-based length measurement |
| Does a specific mutation impair elongation without affecting duplication? | Point-mutation knock-in at the endogenous locus |
| Does a tag affect protein localization during elongation? | Tagged knock-in of the endogenous gene |
| Does overexpression drive over-elongation? | Inducible overexpression of the candidate gene |
| Which genes cooperate in length restriction? | Double knockout or combinatorial perturbation |
| Can elongation be uncoupled from duplication? | Separation-of-function mutants and live imaging |
How to Study the centriole elongation Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Live-cell imaging | Centriole length over time | Monitoring elongation dynamics in human cells |
| High-throughput electron tomography | Ultrastructural centriole length | Detecting over-elongation in patient samples |
| CRISPR knockout | Loss-of-function effects on elongation | Testing candidate gene requirement |
| Point-mutation knock-in | Specific residue function in elongation | Separating duplication from elongation |
| Tagged knock-in | Protein localization and dynamics | Visualizing elongation machinery |
| Overexpression | Gain-of-function effects on length | Modeling over-elongation |
| Proteomics | Protein interactions in centriole complexes | Mapping elongation regulators |
| Ciliogenesis assays | Cilia formation as a downstream readout | Linking elongation to cilia function |
Live-cell imaging of centriole markers
Live-cell imaging of centriole markers such as CPAP, CEP135, and CEP97 allows real-time measurement of centriole elongation in synchronized human cells. This approach can distinguish initiation, growth, and termination phases and is compatible with CRISPR-tagged knock-in lines.
High-throughput electron tomography
High-throughput electron tomography provides ultrastructural measurements of centriole length and has been used to identify centriole over-elongation as an early event in plasma cell disorders. This method is valuable for detecting subtle length abnormalities that may be missed by light microscopy.
CRISPR perturbation and phenotypic screening
CRISPR knockout, point mutation, and overexpression models enable causal testing of candidate elongation genes in human cells. Combining these perturbations with length measurements and ciliogenesis readouts can reveal gene-specific roles in elongation.
Biochemical and proteomic analysis of centriole complexes
Biochemical and proteomic approaches can identify interactions among elongation regulators such as Ana1/Cep295, Cep135, and microtubules. These methods complement imaging by defining the molecular complexes that drive and restrict elongation.
How CRISPR Can Be Used to Study GO:0061511 centriole elongation
Knockout
CRISPR knockout of candidate elongation genes in human cells can determine whether a gene is required for centriole elongation, using marker-based length measurements and ciliogenesis readouts. Knockout models are particularly useful for testing genes such as CEP97 and CPAP that have established roles in length control.
Point Mutation
Point-mutation knock-in allows precise testing of residues implicated in elongation, such as those in Ana1/Cep295 that separate duplication from elongation. This approach can reveal domain-specific functions without confounding effects of complete protein loss.
Knock-in
Tagged knock-in of endogenous elongation genes enables live-cell imaging of protein localization and dynamics during centriole elongation. This is valuable for tracking CPAP, CEP135, and CEP97 at the centriole during duplication.
Overexpression
Inducible overexpression of elongation regulators can model centriole over-elongation, a phenotype observed in plasma cell disorders. Overexpression studies complement loss-of-function approaches by revealing gain-of-function effects on centriole length.
How EDITGENE Supports centriole elongation Research
Researchers studying centriole elongation-related genes often need to determine whether a candidate gene is causally involved in elongation, whether a specific mutation alters length control, or whether overexpression drives over-elongation. EDITGENE provides CRISPR-based cell models and screening services to address these questions in human cells.
Contact EDITGENE today to design your custom CRISPR model for centriole elongation research.
Frequently Asked Questions About centriole elongation
What is centriole elongation (GO:0061511)?
Centriole elongation is the centrosome organization process by which a centriole increases in length as part of the process of replication.
What genes are involved in centriole elongation?
Key genes include PLK4, SAS-6, CPAP, CEP135, CEP97, CP110, Ana1/Cep295, and CDK1.
How is centriole elongation regulated?
It is regulated by a balance of growth-promoting factors such as CPAP and length-restricting factors such as CEP97 and CP110, with CDK1 providing cell-cycle control.
Why is centriole elongation important for disease?
Dysregulated elongation is linked to plasma cell disorders, ciliogenesis defects, developmental patterning defects, and centrosome amplification in cancer.
What methods are used to study centriole elongation?
Live-cell imaging, high-throughput electron tomography, CRISPR perturbation, and proteomics are commonly used.
Can centriole duplication occur without elongation?
Yes, interactions of N- and C-terminal parts of Ana1 can permit centriole duplication but not elongation, showing the processes are genetically separable.
What is the role of CEP97 in centriole elongation?
CEP97 acts with CDK1 to restrict centriole length and orchestrate ciliogenesis and developmental patterning.
How does CDK1 control centriole length?
CDK1 cooperates with CEP97 to control centriole length, linking elongation to cell-cycle progression.
What happens when centrioles over-elongate?
Centriole over-elongation is an early event in plasma cell disorders and can contribute to centrosome abnormalities.
How can CRISPR help study centriole elongation?
CRISPR knockout, point mutation, knock-in, and overexpression models allow causal testing of candidate elongation genes in human cells.
Conclusion
Centriole elongation (GO:0061511) is a tightly regulated biological process that controls centriole length during duplication, integrating cartwheel assembly, microtubule growth, and length restriction. Key regulators such as PLK4, CPAP, CEP135, CEP97, CP110, Ana1/Cep295, and CDK1 coordinate this process, and their dysfunction is linked to plasma cell disorders, ciliogenesis defects, and developmental patterning abnormalities. Studying centriole elongation requires precise experimental models, and CRISPR-based knockout, point-mutation, knock-in, and overexpression approaches provide powerful tools for causal analysis in human cells. Continued research into elongation mechanisms will advance understanding of organelle size control and its role in human disease.
References
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- 3. Wang Z et al.. 2026. Ana1/Cep295 regulates centriole elongation via Cep135 and microtubules.. J Cell Biol 225(10) PMID: 42530562
- 4. Liu Y et al.. 2026. CDK1 and CEP97 cooperatively control centriole length to orchestrate ciliogenesis and developmental patterning.. Genes Dev 40(13-14):1133-1151 PMID: 42140673
- 5. Nagy A et al.. 2025. Interactions of N- and C-terminal parts of Ana1 permitting centriole duplication but not elongation.. Open Biol 15(2):240325 PMID: 39904373
- 6. Avidor-Reiss T et al.. 2013. Building a centriole.. Curr Opin Cell Biol 25(1):72-7 PMID: 23199753
- 7. Köhrer S et al.. 2023. High-throughput electron tomography identifies centriole over-elongation as an early event in plasma cell disorders.. Leukemia 37(12):2468-2478 PMID: 37821581
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