GO:0030071 regulation of mitotic metaphase/anaphase transition: Cell Cycle Checkpoint Control, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0030071 describes the biological process that modulates the frequency, rate or extent of the metaphase-to-anaphase transition during mitosis.
• The transition is triggered by activation of the anaphase-promoting complex/cyclosome (APC/C) by Cdc20/Sleepy homolog, leading to securin degradation and separase activation.
• Key regulators include APC/C subunits, Cdc20, securin, separase, Plk1, INCENP, CDC25B, and kinetochore-microtubule dynamics.
• Dysregulation of this transition causes chromosomal instability, aneuploidy, and is implicated in cancer and developmental disorders.
• Research methods include live-cell imaging, proteomics, CRISPR knockout/knock-in models, and high-content screening.
• EDITGENE provides CRISPR cell models and library screening to study genes controlling the metaphase-anaphase transition.
Description
The metaphase-to-anaphase transition is a critical checkpoint in mitosis that ensures accurate chromosome segregation. GO:0030071, regulation of mitotic metaphase/anaphase transition, encompasses any process that modulates the frequency, rate or extent of this transition, which is triggered by activation of the anaphase-promoting complex (APC/C) by Cdc20/Sleepy homolog, resulting in securin degradation. This regulatory step is essential for preventing aneuploidy and maintaining genomic stability. Researchers study this process to understand cell cycle control, cancer biology, and potential therapeutic targets. The transition is tightly regulated by protein kinases, phosphatases, and ubiquitin-mediated proteolysis. Key molecular players include APC/C, Cdc20, securin, separase, Plk1, and INCENP. Dysregulation of this transition is associated with chromosomal instability and tumorigenesis. Experimental models such as CRISPR knockout and live-cell imaging are used to dissect the underlying mechanisms.
regulation of mitotic metaphase/anaphase transition At A Glance
| GO ID | GO:0030071 |
|---|---|
| GO term | regulation of mitotic metaphase/anaphase transition |
| Ontology | biological_process |
| Synonym | none |
| Major function | Modulates the progression from metaphase to anaphase during mitosis, ensuring proper chromosome segregation. |
| Key trigger | Activation of the anaphase-promoting complex (APC/C) by Cdc20/Sleepy homolog. |
| Consequence | Degradation of securin, leading to separase activation and sister chromatid separation. |
| Related processes | Ubiquitin-mediated proteolysis, kinetochore-microtubule attachment, spindle assembly checkpoint. |
What Is GO:0030071?
GO:0030071 is defined as any process that modulates the frequency, rate or extent of the cell cycle process in which a cell progresses from metaphase to anaphase during mitosis, triggered by the activation of the anaphase promoting complex by Cdc20/Sleepy homolog which results in the degradation of Securin.
Why Is regulation of mitotic metaphase/anaphase transition Important in Cell Biology?
Regulation of the metaphase-anaphase transition is vital for genomic stability; errors lead to aneuploidy, a hallmark of cancer and developmental disorders. Understanding this process provides insights into cell cycle control and potential therapeutic targets.
• Prevents chromosomal instability and aneuploidy.
• Implicated in cancer development and progression.
• Target for anti-mitotic cancer drugs.
• Essential for embryonic development.
• Regulated by phosphorylation and ubiquitination.
• Involves kinetochore-microtubule dynamics.
• Requires coordinated kinase and phosphatase networks.
• Dysregulation linked to mitotic exit defects.
• Studied using CRISPR models for gene function.
• Potential biomarker for chemotherapy response.
What Happens During regulation of mitotic metaphase/anaphase transition?
Activation of the Anaphase-Promoting Complex (APC/C)
In simple terms: The APC/C is a molecular machine that tags proteins for destruction, and it must be switched on for the cell to divide.
The metaphase-to-anaphase transition is triggered by the activation of the APC/C by its coactivator Cdc20/Sleepy homolog. This activation leads to the ubiquitination and degradation of securin, which in turn releases separase to cleave cohesin and allow sister chromatid separation. The APC/C is regulated by phosphorylation and binding of coactivators.
Securin Degradation and Separase Activation
In simple terms: Securin acts as a safety lock on separase; when securin is destroyed, separase becomes active and cuts the ties holding sister chromosomes together.
Securin degradation is a prerequisite for separase activation and anaphase onset. The APC/C ubiquitinates securin, targeting it for proteasomal degradation. This process is essential for chromosome segregation and is tightly regulated to prevent premature separation.
Role of Kinetochore-Microtubule Dynamics
In simple terms: The attachment of chromosomes to the mitotic spindle must be correct before the cell proceeds, and this is monitored by kinetochore-microtubule interactions.
Kinetochore microtubule dynamics are critical for the metaphase-anaphase transition. Proper attachment of kinetochores to microtubules ensures tension and satisfies the spindle assembly checkpoint, allowing anaphase onset. Disruptions in these dynamics can delay or prevent the transition.
Regulation by Kinases and Phosphatases
In simple terms: Enzymes that add or remove phosphate groups control the timing of the transition.
Plk1 and INCENP form a complex required for the metaphase-anaphase transition. Additionally, a coordinated kinase and phosphatase network regulates Stu2 recruitment to yeast kinetochores, influencing the transition. CDC25B phosphatase degradation at the metaphase-anaphase transition is a prerequisite for correct mitotic exit.
Proteolysis and the Cyclosome
In simple terms: The cyclosome (another name for APC/C) is controlled by protein kinase A, ubiquitination, and localization to ensure timely progression.
Control of metaphase-anaphase progression by proteolysis involves cyclosome function regulated by the protein kinase A pathway, ubiquitination, and localization. This regulation ensures that the transition occurs only when all chromosomes are properly aligned.
Key Genes Involved in GO:0030071 regulation of mitotic metaphase/anaphase transition
Key genes and proteins involved in the regulation of mitotic metaphase/anaphase transition include APC/C subunits, coactivators, and checkpoint components.
| Gene | Major Role | Research Relevance |
|---|---|---|
| APC/C | Ubiquitin ligase that targets securin for degradation | Core machinery; target for inhibitors |
| CDC20 | Coactivator of APC/C | Essential for transition; regulated by phosphorylation |
| PTTG1 (Securin) | Inhibits separase; degraded by APC/C | Its degradation triggers anaphase |
| ESPL1 (Separase) | Cleaves cohesin to separate sister chromatids | Activated upon securin degradation |
| PLK1 | Kinase that regulates mitotic progression | Forms complex with INCENP |
| INCENP | Chromosomal passenger complex component | Required for metaphase-anaphase transition |
| CDC25B | Phosphatase that activates CDK1 | Degraded at transition for mitotic exit |
| BTRC (βTrCP) | Ubiquitin ligase subunit | Mediates CDC25B degradation |
| STU2 | Microtubule-associated protein | Recruited to kinetochores by kinase/phosphatase network |
| MAD2 | Spindle assembly checkpoint protein | Inhibits APC/C until attachment |
| BUB1 | Spindle checkpoint kinase | Regulates APC/C activity |
| BUBR1 | Spindle checkpoint kinase | Inhibits APC/C |
| CDK1 | Cyclin-dependent kinase | Phosphorylates APC/C subunits |
| CCNB1 | Cyclin B1 | Activates CDK1; degraded by APC/C |
| PKA | Protein kinase A | Regulates cyclosome function |
| ER-mitochondria contact | Calcium signaling | Promotes cell division |
How Is regulation of mitotic metaphase/anaphase transition Regulated?
The metaphase-anaphase transition is regulated by the spindle assembly checkpoint, which inhibits APC/C until all chromosomes are properly attached. Protein kinase A pathway, ubiquitination, and localization also regulate cyclosome function. Phosphorylation by CDK1 and Plk1 modulates APC/C activity. Phosphatases such as CDC25B are degraded to allow mitotic exit.
regulation of mitotic metaphase/anaphase transition and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CDC20 | Cancer (various) | Knockout in cancer cell lines |
| PTTG1 | Cancer, pituitary tumors | Overexpression in cell models |
| ESPL1 | Cancer, chromosomal instability | Point mutation knock-in |
| PLK1 | Cancer | Knockout and inhibitor studies |
| CDC25B | Cancer | Knock-in of degradation-resistant mutant |
Cancer and Chromosomal Instability
Dysregulation of the metaphase-anaphase transition leads to chromosomal instability and aneuploidy, which are hallmarks of cancer. Overexpression of CDC20 or securin is observed in various cancers and correlates with poor prognosis. Targeting APC/C or its regulators is a potential therapeutic strategy.
Developmental Disorders
Proper regulation of the metaphase-anaphase transition is essential for embryonic development. Disruption of this process can cause developmental defects and embryonic lethality.
Neurodegeneration
Emerging evidence links mitotic defects to neurodegeneration, although direct connections to GO:0030071 require further study.
From regulation of mitotic metaphase/anaphase transition-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate metaphase-anaphase transition? | CRISPR knockout cell line |
| What is the effect of a specific point mutation in APC/C? | Point mutation knock-in |
| How does tagging affect protein localization? | Tagged knock-in (e.g., GFP) |
| What happens upon overexpression of CDC20? | Overexpression cell line |
| Which genes are essential for transition? | CRISPR library screening |
| How does calcium signaling affect mitosis? | ER-mitochondria contact model |
How to Study the regulation of mitotic metaphase/anaphase transition Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Live-cell imaging | Timing and dynamics of chromosome segregation | Visualize transition in real time |
| Proteomics | Protein degradation and ubiquitination | Identify APC/C substrates |
| CRISPR screening | Gene essentiality for transition | Discover novel regulators |
| Phosphoproteomics | Phosphorylation changes | Map kinase/phosphatase networks |
| Flow cytometry | DNA content and cell cycle profile | Assess aneuploidy |
| Immunofluorescence | Localization of mitotic proteins | Study kinetochore recruitment |
| Western blot | Protein levels of securin, cyclin B1 | Monitor degradation |
Live-Cell Imaging
Live-cell imaging with fluorescently tagged chromosomes and spindle components allows real-time visualization of the metaphase-anaphase transition. This method measures timing and dynamics of chromosome segregation.
Proteomics and Ubiquitinome Analysis
Mass spectrometry-based proteomics can identify substrates of APC/C and changes in ubiquitination during the transition. This reveals degradation events such as securin and CDC25B.
CRISPR Screening
Genome-wide CRISPR knockout screens can identify genes required for the metaphase-anaphase transition. This approach is powerful for discovering novel regulators.
Phosphoproteomics
Phosphoproteomics measures changes in phosphorylation that regulate the transition, including Plk1 and CDK1 substrates.
How CRISPR Can Be Used to Study GO:0030071 regulation of mitotic metaphase/anaphase transition
Knockout
CRISPR knockout of genes such as CDC20 or ESPL1 can arrest cells at metaphase, demonstrating their essential role in the transition. Knockout cell lines are valuable for studying loss-of-function phenotypes.
Point Mutation
Point mutations in APC/C subunits or securin can be introduced to study specific phosphorylation sites or degradation motifs. This helps dissect regulatory mechanisms.
Knock-in
Knock-in of tagged versions (e.g., GFP) of genes like STU2 allows visualization of protein localization at kinetochores. Knock-in of degradation-resistant mutants can stabilize proteins to study effects.
Overexpression
Overexpression of CDC20 or securin can induce premature or delayed anaphase, respectively, providing insights into dosage effects. Overexpression models are useful for cancer research.
How EDITGENE Supports regulation of mitotic metaphase/anaphase transition Research
Researchers studying regulation of mitotic metaphase/anaphase transition-related genes often need to determine whether a candidate gene is causally involved in the process or merely correlated. EDITGENE provides CRISPR-based cell models and screening services to enable such functional studies.
Contact EDITGENE today to design your custom CRISPR model for regulation of mitotic metaphase/anaphase transition research.
Frequently Asked Questions About regulation of mitotic metaphase/anaphase transition
What is GO:0030071?
GO:0030071 is the Gene Ontology term for regulation of mitotic metaphase/anaphase transition, defined as any process that modulates the frequency, rate or extent of the cell cycle process in which a cell progresses from metaphase to anaphase during mitosis, triggered by activation of the anaphase promoting complex by Cdc20/Sleepy homolog which results in degradation of Securin.
What genes are involved in regulation of mitotic metaphase/anaphase transition?
Key genes include APC/C subunits, CDC20, PTTG1 (securin), ESPL1 (separase), PLK1, INCENP, CDC25B, and BTRC.
How is the metaphase-anaphase transition regulated?
It is regulated by APC/C activation, securin degradation, kinase and phosphatase networks, and the spindle assembly checkpoint.
What happens if metaphase-anaphase transition is dysregulated?
Dysregulation leads to chromosomal instability, aneuploidy, and is associated with cancer and developmental disorders.
What is the role of APC/C in metaphase-anaphase transition?
APC/C ubiquitinates securin, leading to its degradation and activation of separase, which triggers anaphase.
How do Plk1 and INCENP regulate metaphase-anaphase transition?
Plk1 and INCENP form a complex required for the metaphase-anaphase transition, likely by regulating chromosomal passenger complex functions.
What methods are used to study regulation of mitotic metaphase/anaphase transition?
Methods include live-cell imaging, proteomics, CRISPR screening, phosphoproteomics, and flow cytometry.
What is the role of CDC25B in metaphase-anaphase transition?
CDC25B degradation at the metaphase-anaphase transition is a prerequisite for correct mitotic exit.
How does protein kinase A regulate the cyclosome?
Protein kinase A pathway regulates cyclosome function through ubiquitination and localization.
What CRISPR models are available for studying this process?
Knockout, point mutation, knock-in, and overexpression models can be generated for genes like CDC20, ESPL1, and PLK1.
Conclusion
Regulation of the mitotic metaphase/anaphase transition (GO:0030071) is a fundamental cell cycle process controlled by APC/C, kinases, phosphatases, and proteolysis. Its dysregulation contributes to cancer and developmental defects. CRISPR-based models and advanced screening methods are essential for dissecting its mechanisms and identifying therapeutic targets.
References
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- 3. Stewart MG et al.. 2025. A coordinated kinase and phosphatase network regulates Stu2 recruitment to yeast kinetochores.. J Cell Biol 224(8) PMID: 40576560
- 4. Yu A et al.. 2008. Regulation of cAMP on the first mitotic cell cycle of mouse embryos.. Mol Reprod Dev 75(3):489-95 PMID: 18022836
- 5. Thomas Y et al.. 2010. βTrCP-dependent degradation of CDC25B phosphatase at the metaphase-anaphase transition is a pre-requisite for correct mitotic exit.. Cell Cycle 9(21):4338-50 PMID: 21051950
- 6. Zhai Y et al.. 1995. Kinetochore microtubule dynamics and the metaphase-anaphase transition.. J Cell Biol 131(3):721-34 PMID: 7593192
- 7. Goto H et al.. 2006. Complex formation of Plk1 and INCENP required for metaphase-anaphase transition.. Nat Cell Biol 8(2):180-7 PMID: 16378098
- 8. Yanagida M et al.. 1999. Control of metaphase-anaphase progression by proteolysis: cyclosome function regulated by the protein kinase A pathway, ubiquitination and localization.. Philos Trans R Soc Lond B Biol Sci 354(1389):1559-69; discussion 1569-70 PMID: 10582241
