GO:0007346 regulation of mitotic cell cycle: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0007346 regulation of mitotic cell cycle describes any process that modulates the rate or extent of progress through the mitotic cell cycle.
• Mitotic progression is driven by reversible protein phosphorylation, with widespread full phosphorylation site occupancy observed during mitosis.
• Cell cycle regulation is coordinated with Rho signaling pathways, autophagy machinery such as ULK1-ATG13, and developmental programs including multiciliated cell differentiation.
• Dysregulation of mitotic cell cycle control is linked to cancer, neurodegeneration, and inappropriate cell cycle re-entry in post-mitotic neurons.
• Comparative studies in plants, Trypanosoma brucei, and mammals reveal conserved and lineage-specific mitotic regulatory mechanisms.
• CRISPR-based knockout, point mutation, knock-in, and overexpression models enable causal testing of mitotic regulatory genes.
Description
The Gene Ontology term GO:0007346, regulation of mitotic cell cycle, is defined as any process that modulates the rate or extent of progress through the mitotic cell cycle. This biological process encompasses the signaling, checkpoint, and post-translational mechanisms that ensure faithful chromosome segregation and timely cell division. Because mitotic errors underlie numerous human pathologies, understanding how this process is regulated is a central goal in cell and cancer biology. Mitotic progression is accompanied by extensive changes in protein phosphorylation, with quantitative phosphoproteomics revealing widespread full phosphorylation site occupancy during mitosis. This phospho-regulation extends to diverse substrates, including the autophagy-initiating kinase ULK1 and its partner ATG13, which are phosphorylated in a cell cycle-dependent manner. Beyond phosphorylation, mitotic regulation intersects with Rho GTPase signaling pathways that control actomyosin dynamics during cytokinesis. Comparative studies in plants and protozoa such as Trypanosoma brucei demonstrate that core mitotic regulatory logic is evolutionarily conserved while adapting to distinct environmental and hormonal cues. In multiciliated cells, an alternative cell cycle program coordinates differentiation, highlighting the flexibility of mitotic regulatory networks. Finally, evidence of cell cycle re-entry in post-mitotic, terminally differentiated feline neurons underscores the importance of maintaining mitotic quiescence in the nervous system.
regulation of mitotic cell cycle At A Glance
| GO ID | GO:0007346 |
|---|---|
| GO term | regulation of mitotic cell cycle |
| Ontology | biological_process |
| Synonym | mitotic cell cycle modulation; mitotic cell cycle regulation; mitotic cell cycle regulator; modulation of mitotic cell cycle progression; regulation of mitotic cell cycle progression; regulation of progression through mitotic cell cycle |
| Major function | Modulates the rate or extent of progress through the mitotic cell cycle |
| Related processes | Rho signaling, autophagy regulation, multiciliated cell differentiation, neuronal quiescence |
| Key modification | Reversible protein phosphorylation with widespread full site occupancy during mitosis |
| Taxonomic scope | Conserved across plants, protozoa, and mammals |
What Is GO:0007346?
In our own words, GO:0007346 regulation of mitotic cell cycle refers to any biological process that adjusts the speed, timing, or completion of the mitotic cell cycle. It includes positive and negative regulatory inputs that act at checkpoints, during spindle assembly, and throughout mitotic progression, ensuring that cell division occurs only when appropriate and that each stage is executed with fidelity.
Why Is regulation of mitotic cell cycle Important in Cell Biology?
Regulation of the mitotic cell cycle is fundamental to tissue homeostasis, development, and genome stability. Its dysregulation can lead to uncontrolled proliferation in cancer, inappropriate cell cycle re-entry in post-mitotic neurons associated with neurodegeneration, and developmental defects in multiciliated epithelia. Understanding the molecular players and checkpoints that govern mitotic progression is therefore essential for identifying therapeutic targets and biomarkers across oncology, neuroscience, and regenerative medicine.
• Controls the timing and fidelity of chromosome segregation, preventing aneuploidy and genomic instability.
• Integrates extracellular cues such as hormones and environmental signals in plants.
• Coordinates with Rho GTPase signaling to regulate cytokinesis and cell shape.
• Links to autophagy through cell cycle-dependent phosphorylation of ULK1-ATG13.
• Governs the balance between proliferation and differentiation in multiciliated cells.
• Maintains post-mitotic neuronal quiescence; loss of this control can lead to cell cycle re-entry.
• Provides conserved regulatory paradigms across Trypanosoma brucei and higher eukaryotes.
• Serves as a rich source of anticancer targets due to frequent mitotic checkpoint alterations.
• Influences neutrophil extracellular trap formation through cell cycle-related mechanisms.
• Offers experimental entry points for CRISPR screens and phosphoproteomic mapping.
What Happens During regulation of mitotic cell cycle?
Checkpoint signaling and mitotic entry
In simple terms: Before a cell commits to division, checkpoint proteins verify that DNA is intact and the environment is favorable.
Regulation of mitotic cell cycle begins with checkpoint signaling that gates entry into mitosis. Phosphoproteomic studies have shown that mitosis is accompanied by widespread full phosphorylation site occupancy, indicating that checkpoint kinases and mitotic kinases extensively remodel the phosphoproteome to license division. In plants, hormonal and environmental inputs modulate the expression and activity of core cell cycle regulators to align division with growth conditions.
Phospho-regulation of mitotic substrates
In simple terms: Enzymes add phosphate groups to many proteins, acting like switches that turn mitotic processes on or off.
A central mechanism of mitotic regulation is reversible phosphorylation. Quantitative phosphoproteomics has revealed that a large fraction of phosphorylation sites reach full occupancy during mitosis, underscoring the scale of phospho-regulation. Specific examples include ULK1 and ATG13, whose phosphorylation is cell cycle-dependent and links mitotic progression to autophagy regulation. These modifications coordinate processes such as spindle assembly, chromosome condensation, and nuclear envelope breakdown.
Rho signaling and cytokinesis
In simple terms: After chromosomes separate, Rho proteins help pinch the cell into two daughter cells.
Rho signaling pathways are regulated during the cell cycle and are essential for actomyosin ring assembly and cytokinesis. Cell cycle-dependent control of Rho GTPase activity ensures that contractile events occur only after chromosome segregation is complete, thereby maintaining genomic integrity.
Alternative cell cycle programs in differentiation
In simple terms: Some specialized cells use a modified version of the cell cycle to build structures like cilia.
Multiciliated cell differentiation utilizes an alternative cell cycle program that coordinates multiple rounds of centriole amplification with cell cycle exit. This demonstrates that regulation of mitotic cell cycle can be rewired for developmental purposes, producing post-mitotic cells with specialized functions.
Maintenance of post-mitotic quiescence
In simple terms: Mature neurons normally stop dividing, and keeping them out of the cell cycle is important for their survival.
In terminally differentiated feline neurons, evidence of cell cycle re-entry suggests that regulatory mechanisms actively suppress mitotic progression in post-mitotic cells. Loss of this suppression may contribute to neuronal dysfunction, highlighting the importance of negative regulation within GO:0007346.
Key Genes Involved in GO:0007346 regulation of mitotic cell cycle
The following genes and proteins are experimentally implicated in the regulation of the mitotic cell cycle across model systems.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ULK1 | Autophagy-initiating kinase phosphorylated during the cell cycle | Links mitotic regulation to autophagy |
| ATG13 | ULK1 partner and substrate | Cell cycle-dependent phosphorylation |
| RHOA | Rho GTPase controlling actomyosin dynamics | Cytokinesis regulation |
| ROCK1 | Rho effector kinase | Actomyosin ring assembly |
| CDK1 | Cyclin-dependent kinase driving mitotic entry | Core mitotic regulator |
| CCNB1 | Cyclin B1, CDK1 partner | Mitotic progression |
| PLK1 | Polo-like kinase 1 | Spindle and checkpoint regulation |
| AURKA | Aurora kinase A | Centrosome maturation |
| AURKB | Aurora kinase B | Chromosome segregation |
| BUB1 | Spindle assembly checkpoint kinase | Mitotic checkpoint |
| MAD2L1 | Spindle checkpoint component | Aneuploidy prevention |
| TP53 | Tumor suppressor monitoring genomic integrity | Cell cycle arrest |
| CDKN1A | p21, CDK inhibitor | Cell cycle arrest |
| CCND1 | Cyclin D1, G1-S transition | Proliferation control |
| E2F1 | Transcription factor for S-phase genes | Cell cycle entry |
| RB1 | Retinoblastoma protein, G1 checkpoint | Cell cycle restriction point |
| MYC | Proliferation-associated transcription factor | Cell cycle progression |
| CDC25C | Phosphatase activating CDK1 | Mitotic entry |
How Is regulation of mitotic cell cycle Regulated?
Regulation of the mitotic cell cycle is itself controlled by multiple layers of regulation. In plants, hormones and environmental signals modulate the expression and activity of core cell cycle genes. In mammalian cells, phosphorylation by mitotic kinases such as CDK1, PLK1, and Aurora kinases creates a phospho-switch network that governs substrate activity. The autophagy machinery, including ULK1-ATG13, is also subject to cell cycle-dependent phosphorylation, providing crosstalk between mitotic progression and metabolic stress responses. Rho signaling pathways are regulated in a cell cycle-dependent manner to ensure proper cytokinesis. Additionally, in multiciliated cells, an alternative cell cycle program is deployed under developmental control. Finally, maintenance of post-mitotic neuronal quiescence involves active suppression of cell cycle re-entry.
regulation of mitotic cell cycle and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| TP53 | Cancer, genomic instability | Knockout in cancer cell lines |
| CCND1 | Breast cancer, lymphoma | Overexpression in mammary epithelial cells |
| AURKA | Colorectal cancer, neuroblastoma | Point mutation knock-in in HCT116 |
| ULK1 | Autophagy-related cancer and neurodegeneration | Knockout in HeLa and neuronal lines |
| RHOA | Cancer invasion, cytokinesis defects | Knockout in fibroblasts |
Cancer and uncontrolled proliferation
Dysregulation of mitotic cell cycle control is a hallmark of cancer. Alterations in checkpoint kinases, cyclins, and Rho signaling pathways can drive uncontrolled proliferation and genomic instability. Targeting mitotic regulatory proteins is a major therapeutic strategy in oncology.
Neurodegeneration and inappropriate cell cycle re-entry
Post-mitotic neurons normally remain quiescent, but evidence of cell cycle re-entry has been observed in terminally differentiated feline neurons, suggesting that loss of mitotic suppression may contribute to neurodegeneration. This highlights the importance of negative regulation within GO:0007346 for neuronal survival.
Developmental disorders of multiciliated epithelia
Multiciliated cell differentiation relies on an alternative cell cycle program; disruption of this program can lead to defects in ciliary function and associated developmental disorders.
Infectious disease and parasite proliferation
In Trypanosoma brucei, regulation of the cell division cycle is essential for parasite proliferation and survival, making it a potential target for antiparasitic intervention.
From regulation of mitotic cell cycle-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is a candidate gene required for mitotic progression? | CRISPR knockout in HeLa or RPE1 cells |
| Does a specific phosphorylation site regulate mitotic entry? | Point mutation knock-in at the phospho-site |
| Does a disease-associated variant alter mitotic timing? | Knock-in of the variant in isogenic cell lines |
| Where does a regulatory protein localize during mitosis? | Endogenous tagged knock-in with fluorescent tag |
| Does overexpression drive proliferation? | Doxycycline-inducible overexpression in primary cells |
| Which genes modulate mitotic checkpoint fitness? | Genome-wide CRISPR library screening |
How to Study the regulation of mitotic cell cycle Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Phosphoproteomics | Phosphorylation site occupancy | Mapping mitotic kinase substrates |
| Live-cell imaging | Spindle dynamics and cytokinesis | Real-time mitotic progression |
| CRISPR knockout screening | Gene requirement for proliferation | Identifying mitotic regulators |
| Flow cytometry | DNA content and cell cycle distribution | Checkpoint arrest analysis |
| Immunofluorescence | Subcellular localization of mitotic proteins | Spindle and centrosome studies |
| Western blot | Protein expression and phosphorylation | Validation of cell cycle markers |
| RNA-seq | Transcriptional changes during mitosis | Cell cycle gene expression profiling |
Quantitative phosphoproteomics
Mass spectrometry-based phosphoproteomics enables mapping of phosphorylation site occupancy during mitosis, revealing widespread full site occupancy and identifying substrates of mitotic kinases.
Live-cell imaging
Fluorescent tagging of mitotic regulators and time-lapse microscopy allow real-time monitoring of spindle assembly, chromosome segregation, and cytokinesis dynamics.
CRISPR-based genetic screens
Pooled CRISPR knockout or activation screens can identify genes that modulate mitotic progression and checkpoint function, providing causal links between genotype and cell cycle phenotype.
Comparative cell cycle analysis
Studying model organisms such as Trypanosoma brucei and plants provides evolutionary context for conserved and divergent mitotic regulatory mechanisms.
How CRISPR Can Be Used to Study GO:0007346 regulation of mitotic cell cycle
Knockout
CRISPR knockout of candidate mitotic regulators allows assessment of their requirement for proliferation, checkpoint activation, and chromosome segregation fidelity. For example, knocking out ULK1 or ATG13 can reveal their roles in cell cycle-dependent autophagy.
Point Mutation
Introducing precise point mutations at phosphorylation sites or catalytic residues enables testing of specific post-translational modifications in mitotic regulation, such as those on ULK1-ATG13 or CDK1 substrates.
Knock-in
Knock-in of disease-associated variants or fluorescent tags at endogenous loci provides physiologically relevant models to study mitotic gene function and localization.
Overexpression
Overexpression of cyclins, kinases, or Rho signaling components can drive aberrant proliferation or cytokinesis defects, modeling oncogenic states.
How EDITGENE Supports regulation of mitotic cell cycle Research
Researchers studying regulation of mitotic cell cycle-related genes often need to determine whether a candidate gene is causally involved in mitotic progression or merely correlated with it. EDITGENE provides end-to-end CRISPR services to generate precisely engineered cell models that enable such causal inferences.
Contact EDITGENE today to design your custom CRISPR model for regulation of mitotic cell cycle research.
Frequently Asked Questions About regulation of mitotic cell cycle
What is GO:0007346 regulation of mitotic cell cycle?
GO:0007346 is a Gene Ontology biological process term defined as any process that modulates the rate or extent of progress through the mitotic cell cycle.
What genes are involved in regulation of mitotic cell cycle?
Key genes include CDK1, CCNB1, PLK1, AURKA, AURKB, BUB1, MAD2L1, ULK1, ATG13, RHOA, and ROCK1, among others.
How is the mitotic cell cycle regulated by phosphorylation?
Mitosis is accompanied by widespread full phosphorylation site occupancy, and kinases such as CDK1 and PLK1 phosphorylate numerous substrates to control mitotic progression.
What is the role of ULK1-ATG13 in the cell cycle?
ULK1 and ATG13 are phosphorylated in a cell cycle-dependent manner, linking mitotic regulation to autophagy.
How does Rho signaling regulate mitosis?
Rho signaling pathways are regulated during the cell cycle and control actomyosin ring assembly during cytokinesis.
Can neurons re-enter the cell cycle?
Yes, evidence of cell cycle re-entry has been observed in post-mitotic, terminally differentiated feline neurons, suggesting loss of mitotic suppression.
What is an alternative cell cycle in multiciliated cells?
Multiciliated cell differentiation uses an alternative cell cycle program that coordinates centriole amplification with cell cycle exit.
How is the plant cell cycle regulated by hormones?
Plant cell cycle progression is modulated by hormones and environmental signals that control core cell cycle gene expression.
What diseases are linked to mitotic cell cycle dysregulation?
Cancer, neurodegeneration, and developmental disorders of multiciliated epithelia are linked to dysregulated mitotic cell cycle control.
How can CRISPR help study regulation of mitotic cell cycle?
CRISPR knockout, point mutation, knock-in, and overexpression models enable causal testing of mitotic regulatory genes in relevant cell types.
Conclusion
GO:0007346 regulation of mitotic cell cycle encompasses the diverse signaling and post-translational mechanisms that control the rate and fidelity of mitotic division. From phosphoproteomic networks to Rho signaling and alternative cell cycle programs, this process is central to development, tissue homeostasis, and disease. Dysregulation contributes to cancer, neurodegeneration, and developmental defects, making it a rich area for therapeutic targeting. CRISPR-based models and advanced omics technologies continue to illuminate the causal roles of individual regulators within this process.
References
- 1. Shimotohno A et al.. 2021. Regulation of the Plant Cell Cycle in Response to Hormones and the Environment.. Annu Rev Plant Biol 72:273-296 PMID: 33689401
- 2. Choksi SP et al.. 2024. An alternative cell cycle coordinates multiciliated cell differentiation.. Nature 630(8015):214-221 PMID: 38811726
- 3. Wisnet K et al.. 2022. Evidence of cell cycle re-entry in post-mitotic, terminally differentiated feline neurons.. Histochem Cell Biol 158(2):193-198 PMID: 35551458
- 4. Li Z et al.. 2021. Phospho-regulation and function of ULK1-ATG13 during the cell cycle.. Autophagy 17(4):1054-1056 PMID: 33666137
- 5. David M et al.. 2012. Cell cycle regulation of Rho signaling pathways.. Cell Cycle 11(16):3003-10 PMID: 22825247
- 6. Olsen JV et al.. 2010. Quantitative phosphoproteomics reveals widespread full phosphorylation site occupancy during mitosis.. Sci Signal 3(104):ra3 PMID: 20068231
- 7. Li Z. 2012. Regulation of the cell division cycle in Trypanosoma brucei.. Eukaryot Cell 11(10):1180-90 PMID: 22865501
- 8. Robson MI et al.. 2014. NETs and cell cycle regulation.. Adv Exp Med Biol 773:165-85 PMID: 24563348
