GO:0071539 protein localization to centrosome: Components, Assembly and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0071539 (protein localization to centrosome) describes the biological process by which proteins are transported to, or maintained at, the centrosome, the primary microtubule-organizing center of animal cells.
• Centrosomal protein localization is cell-cycle regulated; CDK1 activity at the centrosome controls centriole length and mitotic progression.
• 14-3-3 proteins mediate the transport of Centrin2 to the centrosome, illustrating a chaperone-like targeting mechanism.
• Multiple proteins including TopBP1, BARD1, CCHCR1, JAKMIP2, and CPAP localize to the centrosome and are required for genome stability, ciliogenesis, and cell division.
• Dysregulation of centrosomal protein localization is linked to cancer, developmental disorders, and ciliopathies.
• CRISPR knockout, knock-in, and overexpression models are essential tools for dissecting the causal roles of centrosomal proteins.
Description
The centrosome is the major microtubule-organizing center in animal cells and is critical for mitotic spindle assembly, cell polarity, and ciliogenesis. The biological process termed protein localization to centrosome (GO:0071539) encompasses the active transport and retention of specific proteins at this organelle, ensuring that the centrosome is properly assembled and functional. This process is not passive; it requires motor proteins, adaptor molecules, and post-translational modifications that together deliver and anchor proteins to the centrosomal matrix and centrioles. Understanding how proteins localize to the centrosome is fundamental to cell biology because the centrosome coordinates chromosome segregation and cell division. Defects in centrosomal protein targeting lead to centrosome amplification, mitotic errors, and genomic instability, which are hallmarks of cancer and developmental syndromes. Moreover, the centrosome serves as a docking site for signaling molecules that regulate the cell cycle, DNA damage response, and ciliogenesis. Recent studies have identified diverse proteins that localize to the centrosome, including Centrin2, TopBP1, BARD1, CCHCR1, JAKMIP2, and CPAP, each with distinct roles in centrosome function. The mechanisms of their localization involve 14-3-3 proteins, CDK1-mediated phosphorylation, and interactions with centriolar and pericentriolar material (PCM) components. This article synthesizes current knowledge on GO:0071539, covering its definition, molecular players, regulatory pathways, disease relevance, and experimental approaches for investigation.
protein localization to centrosome At A Glance
| GO ID | GO:0071539 |
|---|---|
| GO term | protein localization to centrosome |
| Ontology | biological_process |
| Synonym | protein localisation to centrosome |
| Definition | A process in which a protein is transported to, or maintained at, the centrosome. |
| Major function | Targeting and retention of proteins at the centrosome for microtubule organization, cell division, and ciliogenesis. |
| Related cellular component | Centrosome, centriole, pericentriolar material (PCM) |
| Key regulatory kinase | CDK1 |
| Example proteins | Centrin2, TopBP1, BARD1, CCHCR1, JAKMIP2, CPAP |
What Is GO:0071539?
GO:0071539, protein localization to centrosome, is defined as the biological process in which a protein is transported to, or maintained at, the centrosome. This includes the directed movement of proteins from the cytoplasm or other organelles to the centrosome, as well as the mechanisms that retain them there. The process is essential for building and maintaining the centrosome's structure and function throughout the cell cycle.
Why Is protein localization to centrosome Important in Cell Biology?
Protein localization to the centrosome is vital for cellular processes that depend on a functional microtubule cytoskeleton, including mitosis, cell migration, and primary cilia formation. Disruption of this process causes centrosome dysfunction, which is associated with cancer, developmental disorders, and ciliopathies. Therefore, understanding the mechanisms of centrosomal protein targeting provides insights into fundamental cell biology and offers potential therapeutic targets for diseases characterized by centrosome abnormalities.
• Ensures proper mitotic spindle assembly and chromosome segregation.
• Regulates centriole length and duplication, preventing centrosome amplification.
• Required for primary cilia formation and ciliogenesis.
• Mediates DNA damage response and genome stability through proteins like TopBP1 and BARD1.
• Involved in cell cycle progression via CDK1 activity at the centrosome.
• Dysregulation is linked to cancer, including breast and ovarian cancers.
• Mutations in centrosomal proteins cause developmental disorders such as microcephaly.
• Serves as a hub for signaling pathways that coordinate cell division and differentiation.
• Provides targets for CRISPR-based functional studies and drug discovery.
• Essential for understanding tissue-specific functions of the centrosome in development.
What Happens During protein localization to centrosome?
Recognition and Targeting of Proteins to the Centrosome
In simple terms: Proteins are recognized by specific signals or adaptors and directed toward the centrosome.
The first step in protein localization to the centrosome involves the recognition of targeting signals within the protein or its interaction with adaptor molecules. For example, 14-3-3 proteins bind to Centrin2 and mediate its localization to the centrosome. Similarly, CCHCR1 interacts with OFD1 and PCM1 to link P-body proteins to the centrosome. This recognition ensures that only specific proteins are delivered to the centrosome at the right time.
Transport Along Microtubules and Motor Proteins
In simple terms: Proteins travel along microtubule tracks to reach the centrosome.
Many centrosomal proteins are transported along microtubules by motor proteins such as dynein and kinesin. JAKMIP2, a Golgi-associated protein, is linked to the centrosome and performs microtubule-related functions, suggesting a role in transport. The microtubule network serves as a highway for delivering proteins to the centrosome, and disruption of microtubules impairs this process.
Docking and Retention at the Centrosome
In simple terms: Once at the centrosome, proteins are anchored in place to perform their functions.
After transport, proteins must be retained at the centrosome. This often involves binding to structural components such as centriolar proteins or pericentriolar material (PCM). For instance, CPAP is a centriolar protein whose insufficiency leads to incomplete centrioles that duplicate but fragment, indicating its role in maintaining centriole integrity. TopBP1 localizes to the mitotic centrosome and mediates mitotic progression, requiring retention for its function.
Cell Cycle Regulation of Localization
In simple terms: The timing of protein delivery to the centrosome is controlled by the cell cycle.
Protein localization to the centrosome is tightly regulated by cell cycle kinases. CDK1 activity at the centrosome regulates the cell cycle, and CDK1 cooperates with CEP97 to control centriole length. Phosphorylation by CDK1 can trigger the recruitment or release of proteins, ensuring that centrosome composition changes appropriately during cell cycle transitions.
Maintenance and Turnover
In simple terms: Proteins at the centrosome are continuously maintained and replaced as needed.
The centrosome is a dynamic structure, and proteins are constantly turned over. BARD1, in cooperation with BRCA1, OLA1, and RACK1, regulates centrosome function, and its localization is important for maintaining centrosome integrity. Maintenance mechanisms ensure that the centrosome remains functional throughout successive cell divisions.
Key Genes Involved in GO:0071539 protein localization to centrosome
The following genes encode proteins that localize to the centrosome and are directly implicated in GO:0071539, as supported by published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CETN2 | Centrin2, a centriolar protein; localization mediated by 14-3-3 proteins | Studying centriole duplication and centrosome targeting mechanisms |
| TOPBP1 | Localizes to mitotic centrosome; mediates mitotic progression | Investigating DNA damage response and mitosis |
| BARD1 | Regulates centrosome function with BRCA1/OLA1/RACK1 | Cancer research, especially breast and ovarian cancer |
| CCHCR1 | Links P-body proteins to centrosome; required for ciliogenesis via OFD1 and PCM1 | Ciliopathy and RNA granule research |
| JAKMIP2 | Golgi-associated protein linked to centrosome; microtubule-related functions | Understanding Golgi-centrosome communication |
| CPAP | Centriolar protein; insufficiency leads to incomplete centrioles | Microcephaly and centriole biogenesis studies |
| CDK1 | Kinase that regulates centrosome activity and centriole length with CEP97 | Cell cycle regulation and centrosome duplication |
| CEP97 | Controls centriole length with CDK1 | Ciliogenesis and developmental patterning |
| OFD1 | Interacts with CCHCR1 at centrosome; ciliogenesis factor | Oral-facial-digital syndrome research |
| PCM1 | Pericentriolar material protein; interacts with CCHCR1 | Centrosome assembly and ciliogenesis |
| BRCA1 | Cooperates with BARD1 in centrosome regulation | Hereditary breast and ovarian cancer |
| OLA1 | Part of BARD1 complex regulating centrosome | Centrosome integrity and cancer |
| RACK1 | Part of BARD1 complex regulating centrosome | Signaling and centrosome function |
| 14-3-3 proteins | Mediate Centrin2 localization to centrosome | Protein targeting and chaperone-like functions |
| PLK4 | Master regulator of centriole duplication (implied by centriole studies) | Centriole biogenesis and cancer |
| SAS-6 | Centriolar cartwheel protein (implied by centriole studies) | Centriole assembly mechanisms |
How Is protein localization to centrosome Regulated?
Protein localization to the centrosome is regulated by cell cycle kinases, particularly CDK1, which phosphorylates substrates to control centrosome activity and centriole length. CDK1 cooperates with CEP97 to ensure proper centriole length during ciliogenesis and developmental patterning. Additionally, 14-3-3 proteins regulate the localization of Centrin2, acting as adaptors that bind phosphorylated targets. The BARD1-BRCA1-OLA1-RACK1 complex also modulates centrosome function, potentially through ubiquitination or signaling. These regulatory layers ensure that centrosomal protein composition is dynamically controlled in response to cell cycle cues and developmental signals.
protein localization to centrosome and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| BARD1 | Breast and ovarian cancer | Knockout in cancer cell lines; xenograft models |
| CPAP | Microcephaly, centriole fragmentation | Patient-derived iPSCs; knockout mice |
| CCHCR1 | Ciliopathies, oral-facial-digital syndrome | Knockout zebrafish; 3D organoids |
| TOPBP1 | Mitotic progression defects, cancer | Conditional knockout in mouse models |
| CDK1 | Cell cycle dysregulation, cancer | Point mutation knock-in for kinase-dead alleles |
Cancer and Genomic Instability
Defects in protein localization to the centrosome can lead to centrosome amplification, mitotic errors, and chromosomal instability, which are hallmarks of cancer. BARD1, a BRCA1 partner, regulates centrosome function, and its dysfunction is associated with breast and ovarian cancers. CPAP insufficiency results in incomplete centrioles that duplicate but fragment, contributing to genomic instability. Thus, proper centrosomal protein targeting is critical for preventing tumorigenesis.
Developmental Disorders and Ciliopathies
Centrosome dysfunction due to mislocalization of proteins causes developmental disorders, including microcephaly and ciliopathies. CPAP mutations lead to microcephaly, and CCHCR1 is required for ciliogenesis through interactions with OFD1 and PCM1, linking it to ciliopathy-related phenotypes. These conditions highlight the importance of precise protein localization for tissue development.
Cell Cycle and Proliferation Disorders
TopBP1 localization to the mitotic centrosome is essential for mitotic progression, and its disruption can cause cell cycle arrest. CDK1 activity at the centrosome regulates the cell cycle, and its dysregulation may contribute to proliferative disorders. Therefore, proteins involved in GO:0071539 are potential targets for therapeutic intervention in diseases of uncontrolled cell division.
From protein localization to centrosome-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of CETN2 affect centrosome localization? | CRISPR knockout of CETN2 in HeLa cells |
| How does CDK1 phosphorylation regulate CEP97 localization? | Point mutation knock-in of phospho-deficient CEP97 |
| Can we visualize CCHCR1 at the centrosome? | Knock-in of GFP-tagged CCHCR1 |
| Does BARD1 overexpression cause centrosome amplification? | Overexpression of BARD1 in breast epithelial cells |
| What is the interactome of JAKMIP2 at the centrosome? | Knock-in of BirA tag for proximity labeling |
| Is CPAP required for centriole maintenance? | Conditional knockout of CPAP in mouse embryonic fibroblasts |
How to Study the protein localization to centrosome Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Immunofluorescence | Colocalization of protein with centrosomal markers | Validating localization of candidate proteins |
| Live-cell imaging | Dynamics of protein recruitment to centrosome | Studying cell cycle-dependent localization |
| Proximity labeling (BioID) | Protein-protein interactions at centrosome | Identifying novel centrosomal proteins |
| Mass spectrometry | Centrosomal proteome composition | Discovering components of PCM |
| CRISPR knockout | Loss-of-function effects on localization | Determining requirement of genes for localization |
| CRISPR knock-in (GFP tag) | Visualization of endogenous protein | Tracking endogenous protein dynamics |
| Centrosome isolation | Biochemical presence of proteins | Confirming localization by Western blot |
Fluorescence Microscopy and Live Imaging
Immunofluorescence and live-cell imaging with fluorescently tagged proteins (e.g., GFP-CETN2) are standard methods to visualize protein localization to the centrosome. Co-staining with centrosomal markers such as pericentrin or centrin allows precise quantification of colocalization. Live imaging can track the dynamics of protein recruitment during the cell cycle.
Proteomics and Interactomics
Mass spectrometry-based proteomics of isolated centrosomes or proximity labeling (e.g., BioID) can identify proteins that localize to the centrosome and their interaction partners. These approaches reveal the composition of the centrosomal proteome and how it changes under different conditions.
CRISPR-Based Functional Genomics
CRISPR knockout, knock-in, and overexpression screens are powerful for dissecting the function of genes involved in protein localization to the centrosome. For example, knockout of CCHCR1 revealed its role in ciliogenesis, and knockout of CPAP showed its requirement for centriole integrity.
Biochemical Fractionation and Centrosome Isolation
Centrosome isolation by sucrose gradient centrifugation followed by Western blotting can confirm the presence of specific proteins at the centrosome. This method is useful for validating localization observed by microscopy and for studying cell cycle-dependent changes.
How CRISPR Can Be Used to Study GO:0071539 protein localization to centrosome
Knockout
CRISPR knockout of genes such as CETN2, CCHCR1, or CPAP can abolish protein localization to the centrosome and reveal downstream effects on centriole duplication, ciliogenesis, and cell division. Knockout models are essential for loss-of-function studies to establish causality.
Point Mutation
Point mutations can be introduced to disrupt specific phosphorylation sites or interaction domains. For example, mutating CDK1 phosphorylation sites on CEP97 can test their role in centriole length control. This approach provides mechanistic insights without completely removing the protein.
Knock-in
Knock-in of fluorescent or affinity tags (e.g., GFP, BirA) allows visualization and isolation of endogenous proteins at the centrosome. Tagged knock-in of CCHCR1 or JAKMIP2 can reveal their dynamic localization and interaction partners.
Overexpression
Overexpression of centrosomal proteins such as BARD1 or Centrin2 can cause centrosome amplification or mislocalization, mimicking disease states. Overexpression models are useful for gain-of-function studies and for testing therapeutic interventions.
How EDITGENE Supports protein localization to centrosome Research
Researchers studying protein localization to centrosome-related genes often need to determine whether a candidate gene is causally involved in targeting or maintaining proteins at the centrosome. EDITGENE provides comprehensive CRISPR-based services to enable such investigations, from gene knockout to precise point mutations and tagged knock-ins.
Contact EDITGENE today to design your custom CRISPR model for protein localization to centrosome research.
Frequently Asked Questions About protein localization to centrosome
What is GO:0071539?
GO:0071539 is the Gene Ontology term for protein localization to centrosome, a biological process in which proteins are transported to or maintained at the centrosome.
What genes are involved in protein localization to centrosome?
Key genes include CETN2, TOPBP1, BARD1, CCHCR1, JAKMIP2, CPAP, CDK1, and CEP97, among others.
How do proteins get to the centrosome?
Proteins are recognized by adaptors like 14-3-3, transported along microtubules, and docked at the centrosome through interactions with centriolar or PCM components.
Why is protein localization to the centrosome important?
It ensures proper centrosome function for mitosis, ciliogenesis, and genome stability; defects are linked to cancer and developmental disorders.
What diseases are associated with defects in centrosomal protein localization?
Cancer, microcephaly, ciliopathies, and genomic instability syndromes.
How is protein localization to the centrosome regulated?
It is regulated by cell cycle kinases like CDK1 and by adaptor proteins such as 14-3-3 and the BARD1-BRCA1 complex.
What methods are used to study protein localization to the centrosome?
Immunofluorescence, live imaging, proteomics, CRISPR knockout/knock-in, and centrosome isolation.
Can CRISPR be used to study centrosomal protein localization?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression are powerful approaches to dissect gene function in this process.
What is the role of CDK1 in centrosome localization?
CDK1 activity at the centrosome regulates the cell cycle and, with CEP97, controls centriole length.
How does BARD1 relate to centrosome function?
BARD1 cooperates with BRCA1, OLA1, and RACK1 to regulate centrosome integrity, and its dysfunction is linked to cancer.
Conclusion
Protein localization to centrosome (GO:0071539) is a fundamental biological process that ensures the centrosome is properly equipped for its roles in cell division, signaling, and ciliogenesis. The coordinated action of adaptor proteins, motor proteins, and cell cycle kinases delivers and retains specific proteins at the centrosome, and disruption of this process leads to cancer, developmental disorders, and ciliopathies. Continued research using CRISPR-based models and advanced imaging will further elucidate the mechanisms and therapeutic potential of targeting centrosomal protein localization.
References
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- 2. Ulas E et al.. 2025. Golgi-Associated Protein JAKMIP2 Is Linked to the Centrosome and Performs Microtubule-Related Functions.. Cells 14(24) PMID: 41440039
- 3. 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
- 4. Roberts EL et al.. 2024. CDK activity at the centrosome regulates the cell cycle.. Cell Rep 43(4):114066 PMID: 38578823
- 5. Zhang J et al.. 2025. CCHCR1 links P-body proteins to the centrosome and is required for ciliogenesis through interacting with OFD1 and PCM1.. Cell Mol Biol Lett 30(1):103 PMID: 40883668
- 6. Vásquez-Limeta A et al.. 2022. CPAP insufficiency leads to incomplete centrioles that duplicate but fragment.. J Cell Biol 221(5) PMID: 35404385
- 7. Bang SW et al.. 2011. Human TopBP1 localization to the mitotic centrosome mediates mitotic progression.. Exp Cell Res 317(7):994-1004 PMID: 21291884
- 8. Otsuka K et al.. 2020. The Function of BARD1 in Centrosome Regulation in Cooperation with BRCA1/OLA1/RACK1.. Genes (Basel) 11(8) PMID: 32722046
