GO:1903490 positive regulation of mitotic cytokinesis: Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1903490 (positive regulation of mitotic cytokinesis) describes any process that activates or increases the frequency, rate or extent of mitotic cytokinesis, the final step of cell division.
• Cytokinesis is driven by the central spindle, the cleavage furrow and the midbody, and its positive regulation depends on dynamic ubiquitylation and deubiquitylation at these structures.
• Aurora A kinase is a central positive regulator of mitotic progression and cytokinesis, and its activity is linked to cancer stem cell biology.
• Separase regulates RAB-11-positive vesicles at the cleavage furrow and midbody, providing a membrane-trafficking route for positive control of cytokinesis.
• Plant and fungal systems show that cytokinin and GA3 signaling can activate cell division programs, illustrating conserved positive regulation of division.
• CRISPR knockout, point-mutation, knock-in and overexpression models allow causal testing of candidate positive regulators of mitotic cytokinesis.
Description
Mitotic cytokinesis is the terminal event of cell division in which the cytoplasm of a single cell is physically partitioned into two daughter cells. The Gene Ontology term GO:1903490, positive regulation of mitotic cytokinesis, captures any process that activates or increases the frequency, rate or extent of this event. Because cytokinesis must be tightly coordinated with chromosome segregation and membrane remodeling, positive regulators act at the central spindle, the cleavage furrow and the midbody to ensure timely abscission. Understanding these positive regulators is important because their dysregulation can lead to aneuploidy, failed abscission and genome instability, processes relevant to cancer and developmental disorders. Research on positive regulation of mitotic cytokinesis spans model organisms and human cells. In Arabidopsis, cytokinin-activated cell division provides a plant paradigm for positive regulation of division, while in Caenorhabditis elegans separase controls RAB-11-positive vesicles at the cleavage furrow and midbody. In human cells, Aurora A kinase governs mitotic progression and is implicated in cancer stem cell maintenance. Signaling pathways that regulate cell division, including mitotic kinases and ubiquitylation cycles, form the mechanistic backbone of this GO term. For researchers, GO:1903490 is a useful annotation target because it distinguishes positive regulators from the core cytokinesis machinery. It supports functional genomics screens, CRISPR perturbation studies and bioinformatics enrichment analyses aimed at identifying genes that accelerate or enhance cytokinesis. This article summarizes the definition, mechanisms, key genes, disease links and experimental methods relevant to GO:1903490.
positive regulation of mitotic cytokinesis At A Glance
| GO ID | GO:1903490 |
|---|---|
| GO term | positive regulation of mitotic cytokinesis |
| Ontology | biological_process |
| Definition | Any process that activates or increases the frequency, rate or extent of mitotic cytokinesis. |
| Synonyms | activation of cytokinesis after mitosis; activation of mitotic cytokinesis; positive regulation of cytokinesis after mitosis; up regulation of cytokinesis after mitosis; up-regulation of cytokinesis after mitosis; upregulation of cytokinesis after mitosis; up regulation of mitotic cytokinesis; up-regulation of mitotic cytokinesis; upregulation of mitotic cytokinesis |
| Major function | Enhances the initiation, progression or completion of mitotic cytokinesis, the final step of cell division. |
| Related cellular structures | Central spindle, cleavage furrow, midbody. |
| Related processes | Mitotic cell cycle, ubiquitylation and deubiquitylation, vesicle trafficking. |
What Is GO:1903490?
GO:1903490, positive regulation of mitotic cytokinesis, is a biological process term defined as any process that activates or increases the frequency, rate or extent of mitotic cytokinesis. In practical terms, it covers gene products and pathways that promote the initiation, progression or completion of the physical separation of daughter cells after mitosis, rather than the structural components that carry out cytokinesis itself.
Why Is positive regulation of mitotic cytokinesis Important in Cell Biology?
Positive regulation of mitotic cytokinesis is important because failure or delay in cytokinesis produces binucleated cells, aneuploidy and genome instability, all of which are hallmarks of cancer and developmental disease. Positive regulators such as Aurora A and separase-associated vesicle trafficking ensure that the cleavage furrow ingresses correctly and that abscission occurs at the right time and place. Because cytokinesis is the last chance to correct division errors, understanding its positive regulation offers therapeutic opportunities in oncology and regenerative biology.
• Prevents binucleation and aneuploidy by ensuring timely cleavage furrow ingression and abscission.
• Aurora A, a positive regulator of mitosis, is linked to cancer stem cell maintenance and tumor progression.
• Separase-dependent RAB-11 vesicle trafficking at the midbody supports membrane delivery for cytokinesis completion.
• Dynamic ubiquitylation and deubiquitylation at the central spindle provide reversible control of cytokinesis regulators.
• Plant cytokinin signaling activates cell division, offering a model for conserved positive regulation of division.
• Signaling pathways that regulate cell division integrate growth cues with mitotic progression.
• Fungal GA3 responses alter cell division transcriptional programs, relevant to comparative studies.
• Cell cycle triggering in plants illustrates how positive regulation of division is developmentally controlled.
• CRISPR screens can identify new positive regulators of mitotic cytokinesis for drug target discovery.
• Bioinformatics enrichment of GO:1903490 can prioritize candidate genes from omics datasets.
What Happens During positive regulation of mitotic cytokinesis?
Initiation at the central spindle
In simple terms: The cell first builds a signaling platform in the middle of the dividing cell that tells it where to pinch.
Positive regulation of mitotic cytokinesis begins with assembly and activation of the central spindle, a microtubule-rich structure that recruits signaling proteins. Dynamic ubiquitylation and deubiquitylation at the central spindle regulate the localization and activity of cytokinesis factors, providing a reversible switch that promotes furrow formation. Aurora A kinase contributes to mitotic progression and is a positive regulator of events leading to cytokinesis.
Cleavage furrow ingression
In simple terms: The cell membrane pinches inward like a drawstring to start splitting the cell in two.
Once the furrow site is defined, actomyosin contraction drives membrane ingression. Positive regulators enhance the rate and extent of this ingression. Separase regulates RAB-11-positive vesicles at the cleavage furrow, supporting membrane trafficking needed for furrow progression. Signaling pathways that regulate cell division coordinate these events with the cell cycle engine.
Midbody formation and abscission
In simple terms: A narrow bridge forms between the two future cells, and it is finally cut to separate them.
The midbody is the compact structure at the intercellular bridge that coordinates final abscission. Positive regulation of mitotic cytokinesis includes processes that accelerate or enhance midbody maturation and abscission. RAB-11-positive vesicles at the midbody contribute to membrane remodeling during this step, and central spindle ubiquitylation cycles help time abscission.
Coordination with mitotic kinases and signaling
In simple terms: Kinases act like foremen, checking that each step happens in the right order.
Aurora A is a mitotic kinase that promotes mitotic progression and has been linked to cancer stem cell biology. Signaling pathways that regulate cell division integrate external and internal cues to ensure cytokinesis occurs only after chromosome segregation. These kinase and signaling inputs are core positive regulators annotated to GO:1903490.
Conserved positive regulation in plants and fungi
In simple terms: Plants and fungi also have ways to boost cell division, showing this process is ancient and conserved.
In Arabidopsis, cytokinin-activated cell division demonstrates positive regulation of division in a plant context. GA3 treatment alters transcriptional responses in Armillaria gallica, including cell division-related programs. Early work on triggering the cell cycle in plants further supports conserved positive control of division.
Key Genes Involved in GO:1903490 positive regulation of mitotic cytokinesis
The following genes and proteins have documented roles in positive regulation of mitotic cytokinesis or closely related mitotic division processes.
| Gene | Major Role | Research Relevance |
|---|---|---|
| AURKA | Mitotic kinase promoting mitotic progression and cytokinesis | Cancer stem cell maintenance and tumor biology |
| ESPL1 (separase) | Regulates RAB-11-positive vesicles at cleavage furrow and midbody | Membrane trafficking during cytokinesis |
| RAB11 | Vesicle trafficking to the cleavage furrow and midbody | Membrane delivery for abscission |
| Ubiquitin ligases (central spindle) | Ubiquitylation of cytokinesis regulators | Reversible control of central spindle proteins |
| Deubiquitylases (central spindle) | Deubiquitylation counteracting ligases | Dynamic regulation at the central spindle |
| Cytokinin signaling genes (Arabidopsis) | Activate cell division in plants | Plant cytokinesis and division control |
| Cell cycle trigger genes (plants) | Initiate cell cycle progression | Plant division activation |
| GA3-responsive genes (Armillaria gallica) | Transcriptional response to gibberellic acid | Fungal cell division programs |
| Aurora A substrates | Phosphorylation targets in mitosis | Mitotic progression |
| Mitotic signaling pathway components | Integrate signals for cell division | General division regulation |
| RAB-11 effectors | Vesicle docking and fusion at midbody | Abscission membrane remodeling |
| Central spindle kinesins | Microtubule organization at central spindle | Furrow positioning |
| PRC1-like bundling proteins | Microtubule bundling in central spindle | Central spindle assembly |
| Chromosomal passenger complex components | Regulate furrow ingression | Mitotic regulation |
| Polo-like kinase 1 (PLK1) | Promotes mitotic progression | Cytokinesis timing |
| Anillin | Scaffolds furrow components | Cleavage furrow stability |
| ECT2 | RhoA activator at the furrow | Furrow ingression |
How Is positive regulation of mitotic cytokinesis Regulated?
Positive regulation of mitotic cytokinesis is controlled by reversible post-translational modifications, especially ubiquitylation and deubiquitylation at the central spindle, which tune the stability and localization of cytokinesis regulators. Mitotic kinases such as Aurora A provide phosphorylation-based control of mitotic progression. Broader signaling pathways that regulate cell division integrate growth and stress cues with the mitotic machinery. In plants, cytokinin signaling activates cell division, showing hormonal control of positive regulation. Vesicle trafficking regulated by separase and RAB-11 adds a membrane-remodeling layer of control at the cleavage furrow and midbody.
positive regulation of mitotic cytokinesis and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| AURKA | Cancer stem cell maintenance and tumor progression | Knockout and point-mutation cancer cell lines |
| ESPL1 | Cytokinesis failure and aneuploidy | Knockout with RAB-11 vesicle imaging |
| RAB11 | Membrane trafficking defects in abscission | Knock-in fluorescent tagging |
| Central spindle ubiquitin ligases | Genome instability | Knockout and overexpression models |
| Cytokinin signaling genes | Plant growth and division disorders | Arabidopsis knockout lines |
Cancer and genome instability
Defects in cytokinesis can produce aneuploidy and binucleated cells, which are features of cancer. Aurora A, a positive regulator of mitosis, is implicated in cancer stem cell maintenance and tumor progression, making it an attractive oncology target. Positive regulators annotated to GO:1903490 may therefore represent candidate therapeutic nodes.
Developmental and proliferative disorders
Because cytokinesis is essential for normal development, altered positive regulation can affect tissue growth and regeneration. Signaling pathways that regulate cell division are central to developmental control, and plant models show that hormonal activation of division is developmentally programmed.
Infection and fungal biology
Fungal transcriptional responses to GA3 include cell division-related programs, suggesting that positive regulation of division is relevant to fungal growth and potentially to antifungal strategies.
From positive regulation of mitotic cytokinesis-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is a candidate gene required for cytokinesis? | CRISPR knockout cell line |
| Does a specific residue control kinase activity? | Point-mutation knock-in |
| Where does the protein localize during cytokinesis? | Tagged knock-in (e.g., GFP) |
| Does overexpression accelerate cytokinesis? | Overexpression cell model |
| Which genes enhance cytokinesis in a screen? | CRISPR library screening |
| Which pathways are enriched in GO:1903490? | Bioinformatics enrichment analysis |
How to Study the positive regulation of mitotic cytokinesis Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Live-cell imaging | Furrow ingression and abscission timing | Positive regulation of cytokinesis |
| Proteomics | Protein abundance and modifications | Central spindle ubiquitylation |
| RNA-seq | Transcriptional changes | Division-related gene expression |
| CRISPR knockout screening | Gene requirement for cytokinesis | Discovery of positive regulators |
| Point-mutation knock-in | Residue-specific function | Kinase activity studies |
| Tagged knock-in | Protein localization | Central spindle and midbody imaging |
| Bioinformatics enrichment | GO term overrepresentation | GO:1903490 annotation analysis |
| Flow cytometry | Cell cycle and ploidy | Detection of cytokinesis failure |
Live-cell imaging of cytokinesis
Time-lapse microscopy of fluorescently tagged central spindle, furrow and midbody markers allows direct measurement of furrow ingression and abscission timing. This is the primary method to assess positive regulation of mitotic cytokinesis.
Proteomics and ubiquitylation profiling
Mass spectrometry-based proteomics can identify ubiquitylated proteins at the central spindle, revealing dynamic regulation of cytokinesis factors.
Transcriptomics and bioinformatics
RNA-seq and GO enrichment can identify pathways annotated to GO:1903490. Plant and fungal studies show how transcriptional responses reveal division-related programs.
CRISPR functional genomics
Pooled CRISPR knockout screens can systematically identify positive regulators of mitotic cytokinesis, while point-mutation and knock-in models test specific mechanisms.
How CRISPR Can Be Used to Study GO:1903490 positive regulation of mitotic cytokinesis
Knockout
CRISPR knockout of candidate positive regulators such as AURKA or ESPL1 can test whether they are required for efficient mitotic cytokinesis. Loss-of-function phenotypes include delayed abscission or binucleation, which can be scored by imaging.
Point Mutation
Point-mutation knock-in can dissect specific residues in kinases or trafficking proteins, for example to test whether Aurora A catalytic activity is needed for its positive regulatory role.
Knock-in
Tagged knock-in of genes such as RAB11 allows real-time visualization of vesicle trafficking at the cleavage furrow and midbody, directly linking localization to positive regulation.
Overexpression
Overexpression of candidate genes can test whether increased dosage accelerates cytokinesis or overrides checkpoints, providing gain-of-function evidence for GO:1903490.
How EDITGENE Supports positive regulation of mitotic cytokinesis Research
Researchers studying positive regulation of mitotic cytokinesis-related genes often need to determine whether a candidate gene is causally involved in promoting or accelerating cytokinesis, rather than merely correlating with it. EDITGENE provides CRISPR-based cell models and screening services to establish causality with publication-ready validation.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of mitotic cytokinesis research.
Frequently Asked Questions About positive regulation of mitotic cytokinesis
What is GO:1903490?
GO:1903490 is the Gene Ontology term for positive regulation of mitotic cytokinesis, defined as any process that activates or increases the frequency, rate or extent of mitotic cytokinesis.
What genes are involved in positive regulation of mitotic cytokinesis?
Key genes include AURKA, ESPL1 (separase), RAB11 and central spindle ubiquitin ligases and deubiquitylases.
Why is positive regulation of mitotic cytokinesis important?
It ensures timely cell separation and prevents aneuploidy and genome instability, which are linked to cancer.
What happens if cytokinesis is not properly regulated?
Failure can produce binucleated cells and aneuploidy, contributing to tumorigenesis and developmental defects.
Which proteins regulate the central spindle during cytokinesis?
Ubiquitin ligases and deubiquitylases dynamically modify central spindle proteins, while Aurora A and other kinases control mitotic progression.
How does separase regulate cytokinesis?
Separase regulates RAB-11-positive vesicles at the cleavage furrow and midbody, supporting membrane trafficking for abscission.
Is positive regulation of mitotic cytokinesis conserved in plants?
Yes, cytokinin-activated cell division in Arabidopsis demonstrates conserved positive regulation of division.
What methods study positive regulation of mitotic cytokinesis?
Live-cell imaging, proteomics, RNA-seq, CRISPR screens and flow cytometry are commonly used.
How can CRISPR help study GO:1903490?
CRISPR knockout, point-mutation, knock-in and overexpression models can test causality of candidate positive regulators.
What diseases are linked to cytokinesis defects?
Cancer and genome instability are strongly linked, with Aurora A implicated in cancer stem cells.
Conclusion
GO:1903490, positive regulation of mitotic cytokinesis, defines the processes that activate or enhance the final step of cell division. Its mechanisms involve central spindle ubiquitylation cycles, Aurora A kinase signaling, separase-dependent vesicle trafficking and conserved hormonal control in plants. Because cytokinesis failure drives aneuploidy and cancer, positive regulators are important research and therapeutic targets. CRISPR-based knockout, point-mutation, knock-in, overexpression and library screening models provide the causal evidence needed to move from correlation to mechanism. EDITGENE supports these workflows with validated cell models and bioinformatics, enabling publication-ready studies of positive regulation of mitotic cytokinesis.
References
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- 2. Mukai A et al.. 2008. Dynamic regulation of ubiquitylation and deubiquitylation at the central spindle during cytokinesis.. J Cell Sci 121(Pt 8):1325-33 PMID: 18388320
- 3. Li M et al.. 2018. The role of Aurora-A in cancer stem cells.. Int J Biochem Cell Biol 98:89-92 PMID: 29544896
- 4. Crane R et al.. 2004. Aurora A, meiosis and mitosis.. Biol Cell 96(3):215-29 PMID: 15182704
- 5. Rhind N et al.. 2012. Signaling pathways that regulate cell division.. Cold Spring Harb Perspect Biol 4(10) PMID: 23028116
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- 7. Cai G et al.. 2023. Characterization of the transcriptional responses of Armillaria gallica 012m to GA3.. Arch Microbiol 205(9):308 PMID: 37594611
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