GO:0032506 cytokinetic process: Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0032506 cytokinetic process describes the cellular process that divides the cytoplasm and separates a cell into two daughter cells.
• Cytokinetic abscission is a tightly timed final step that requires ESCRT-III recruitment and membrane fission.
• PI(3,4)P2 lipid signaling controls abscission timing and prevents early senescence and cataract formation.
• Formins and actin regulators localize to the cytokinetic apparatus and are required for cleavage furrow ingression.
• Methylation of ESCRT-III components regulates when abscission occurs, linking post-translational modification to division timing.
• Dysregulated cytokinetic processes are linked to senescence, cataract, and other proliferative disorders.
Description
The Gene Ontology term GO:0032506, cytokinetic process, refers to a cellular process involved in cytokinesis, the division of the cytoplasm and its separation into two daughter cells. This term captures the dynamic events that follow chromosome segregation, including cleavage furrow ingression, midbody formation, and abscission. Researchers study this process because failures in cytokinetic timing or execution can lead to binucleation, senescence, and tissue degeneration. The process is highly conserved and has been characterized in organisms ranging from ascidians to Xenopus to human cells. Understanding cytokinetic process is therefore central to cell biology, developmental biology, and disease research.
cytokinetic process At A Glance
| GO ID | GO:0032506 |
|---|---|
| GO term | cytokinetic process |
| Ontology | biological_process |
| Synonym | none |
| Major function | Division of the cytoplasm and separation into two daughter cells |
| Key final step | Cytokinetic abscission |
| Key regulators | ESCRT-III, PI(3,4)P2, formins, actin |
| Associated disease | Early senescence and cataract formation |
What Is GO:0032506?
GO:0032506 cytokinetic process is defined as a cellular process that is involved in cytokinesis, the division of the cytoplasm of a cell and its separation into two daughter cells. It encompasses the molecular and structural events that physically split one cell into two, including the assembly and contraction of the actomyosin ring, membrane remodeling, and the final abscission step.
Why Is cytokinetic process Important in Cell Biology?
Cytokinetic process is essential for genome stability, tissue homeostasis, and development because it ensures that each daughter cell receives a complete copy of the genome and an appropriate cytoplasmic content. Defects in abscission timing or execution can cause binucleation, senescence, and degenerative phenotypes such as cataract. The process is also a target of post-translational regulation, including methylation of ESCRT-III components, which fine-tunes when abscission occurs. Because cytokinetic failure is linked to proliferative and degenerative disorders, understanding its molecular control has broad biomedical relevance.
• Ensures equal cytoplasmic division and genome stability during cell division.
• Controls the timing of abscission through ESCRT-III and its methylation.
• Requires PI(3,4)P2 lipid signaling to prevent early senescence.
• Involves formin-mediated actin assembly at the division site.
• Is conserved in embryonic elongation and notochord morphogenesis.
• Dysregulation is linked to cataract formation and cellular aging.
• Provides a model for studying membrane remodeling and fission.
• Offers targets for research on proliferative and degenerative diseases.
What Happens During cytokinetic process?
Cleavage furrow ingression
In simple terms: The cell pinches inward to start splitting in two.
During cytokinetic process, an actomyosin ring assembles at the equatorial cortex and contracts to drive cleavage furrow ingression. Formin proteins localize to the division site and nucleate actin filaments that support this contraction. This step physically narrows the connection between the two future daughter cells.
Midbody formation
In simple terms: A narrow bridge forms between the two new cells.
As ingression proceeds, a midbody is formed, which serves as a platform for recruiting abscission machinery. The midbody contains bundled microtubules and associated proteins that coordinate the final separation. ESCRT-III components are recruited to this structure to prepare for membrane fission.
ESCRT-III recruitment and abscission
In simple terms: Molecular scissors cut the last connection between the cells.
Cytokinetic abscission requires the sequential recruitment of ESCRT-III components to the midbody. Methylation of ESCRT-III components regulates the timing of this recruitment and the final fission event. PI(3,4)P2-mediated signaling also controls abscission, and its loss leads to early senescence.
Membrane fission and separation
In simple terms: The membrane seals off to make two separate cells.
The final step of cytokinetic process is membrane fission, which separates the two daughter cells. This step depends on ESCRT-III polymerization and disassembly, which is regulated by post-translational modifications. Failure of membrane fission results in persistent cell bridges and binucleation.
Key Genes Involved in GO:0032506 cytokinetic process
The following genes and proteins are experimentally implicated in cytokinetic process, including abscission, actin regulation, and lipid signaling.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ESCRT-III components | Membrane fission during abscission | Methylation regulates abscission timing |
| PI(3,4)P2 effectors | Lipid signaling for abscission | Loss causes early senescence and cataract |
| Formins | Actin nucleation at division site | Localization studied in Xenopus epithelial cells |
| Actin | Cleavage furrow contraction | Required for ingression |
| Myosin | Contractile ring force generation | Drives furrow ingression |
| Microtubules | Midbody scaffold | Platform for ESCRT-III recruitment |
| ESCRT-III CHMP4 | Membrane remodeling | Methylation controls timing |
| ESCRT-III CHMP2 | Membrane fission | Regulated by methylation |
| VPS4 | ESCRT-III disassembly | Required for abscission completion |
| ALIX | ESCRT-III recruitment | Midbody targeting |
| TSG101 | ESCRT-I component | Upstream of ESCRT-III |
| CEP55 | Midbody recruitment | Links microtubules to ESCRT |
| Anillin | Actomyosin ring organization | Scaffold for furrow ingression |
| RhoA | Contractile ring assembly | GTPase signaling |
| Citron kinase | Furrow ingression | Regulates contractility |
| Formin FHOD1 | Actin assembly | Localizes to division site |
| Formin INF2 | Actin and membrane remodeling | Studied in Xenopus |
How Is cytokinetic process Regulated?
Cytokinetic process is regulated by post-translational modifications, notably methylation of ESCRT-III components, which controls the timing of abscission. Lipid signaling through PI(3,4)P2 also regulates abscission, and its disruption leads to early senescence and cataract formation. Actin assembly mediated by formins is spatially and temporally controlled to ensure proper furrow ingression.
cytokinetic process and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| PI(3,4)P2 pathway | Early senescence and cataract | Knockout of lipid phosphatase in lens cells |
| ESCRT-III CHMP4 | Abscission timing defects | Point mutation of methylation sites |
| ESCRT-III CHMP2 | Membrane fission failure | Knockout in HeLa cells |
| Formin FHOD1 | Furrow ingression defects | Overexpression in Xenopus |
| VPS4 | Abscission arrest | Knockout in cultured cells |
Cytokinetic defects and cataract
Loss of PI(3,4)P2-mediated cytokinetic abscission causes early senescence and cataract formation in model systems. This links failed abscission to degenerative disease of the lens.
Senescence and aging
Persistent cytokinetic bridges and abscission failure can trigger cellular senescence, a hallmark of aging. Methylation of ESCRT-III components regulates abscission timing, and its dysregulation may contribute to age-related phenotypes.
Proliferative disorders
Because cytokinetic process is essential for cell division, its dysregulation can affect proliferation and genome stability. Research into abscission regulators may inform studies of proliferative diseases.
From cytokinetic process-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate abscission timing? | Knockout cell line |
| Does methylation of ESCRT-III control abscission? | Point mutation knock-in |
| Where does protein X localize during cytokinesis? | Tagged knock-in |
| Does overexpression of formin alter furrow ingression? | Overexpression |
| Does loss of PI(3,4)P2 cause senescence? | Knockout in lens epithelial cells |
| Is gene X required for midbody formation? | Knockout followed by imaging |
How to Study the cytokinetic process Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Live-cell imaging | Furrow ingression and abscission timing | ESCRT-III recruitment |
| Mass spectrometry | Methylation sites on ESCRT-III | Post-translational regulation |
| Knockout + rescue | Causality of candidate genes | PI(3,4)P2 pathway |
| Fluorescence microscopy | Formin localization | Xenopus epithelial cells |
| Time-lapse microscopy | Midbody formation | Abscission dynamics |
| Senescence assays | Early senescence | Cataract models |
| Notochord elongation assays | Morphogenesis | Ascidian embryos |
Live-cell imaging
Live-cell imaging of fluorescently tagged cytokinetic proteins allows real-time analysis of furrow ingression, midbody formation, and abscission. This method is essential for determining the timing and localization of ESCRT-III components.
Proteomics and methylation analysis
Mass spectrometry-based proteomics can identify methylation sites on ESCRT-III components and quantify their dynamics during abscission. This approach links post-translational modifications to cytokinetic timing.
Genetic knockout and rescue
Knockout of candidate genes followed by rescue with wild-type or mutant constructs tests causality in cytokinetic process. This is particularly useful for lipid signaling and ESCRT-III components.
Xenopus and ascidian models
Xenopus epithelial cells and ascidian embryos provide tractable systems for studying formin localization and notochord elongation during cytokinesis. These models allow direct observation of cytokinetic events in developing tissues.
How CRISPR Can Be Used to Study GO:0032506 cytokinetic process
Knockout
CRISPR knockout of ESCRT-III components or PI(3,4)P2 effectors can reveal their requirement for cytokinetic abscission. Knockout cell lines are used to assess abscission timing, binucleation, and senescence.
Point Mutation
Point mutations at methylation sites of ESCRT-III components can test whether specific modifications regulate abscission timing. Such models help distinguish phosphorylation from methylation effects.
Knock-in
Knock-in of fluorescent tags into endogenous cytokinetic genes allows real-time visualization of protein localization during abscission. Tagged knock-in models are valuable for live-cell imaging.
Overexpression
Overexpression of formins or ESCRT-III components can perturb cytokinetic process and reveal dominant effects on furrow ingression or abscission. These models are useful for structure-function studies.
How EDITGENE Supports cytokinetic process Research
Researchers studying cytokinetic process-related genes often need to determine whether a candidate gene is causally involved in abscission, furrow ingression, or midbody formation. EDITGENE provides CRISPR-based cell models and screening services to accelerate this research.
Contact EDITGENE today to design your custom CRISPR model for cytokinetic process research.
Frequently Asked Questions About cytokinetic process
What is GO:0032506 cytokinetic process?
GO:0032506 is a Gene Ontology biological process term for the cellular process involved in cytokinesis, the division of the cytoplasm and separation into two daughter cells.
What genes are involved in cytokinetic process?
Key genes include ESCRT-III components, PI(3,4)P2 effectors, formins, actin, myosin, and microtubule-associated proteins.
What is the final step of cytokinetic process?
The final step is abscission, which requires ESCRT-III recruitment and membrane fission.
How is cytokinetic abscission regulated?
Abscission is regulated by methylation of ESCRT-III components and by PI(3,4)P2 lipid signaling.
What happens if cytokinetic process fails?
Failure can lead to binucleation, early senescence, and cataract formation.
Which diseases are linked to cytokinetic process?
Defects are linked to early senescence and cataract formation.
What model systems are used to study cytokinetic process?
Xenopus epithelial cells, ascidian embryos, and cultured human cells are commonly used.
How can CRISPR be used to study cytokinetic process?
CRISPR knockout, point mutation, knock-in, and overexpression models can test gene function in abscission and furrow ingression.
What methods measure cytokinetic abscission?
Live-cell imaging, mass spectrometry, and senescence assays are used to measure abscission timing and outcomes.
Why is cytokinetic process important for development?
It ensures equal cytoplasmic division and genome stability during development and tissue homeostasis.
Conclusion
GO:0032506 cytokinetic process is a fundamental biological process that ensures the physical separation of daughter cells after mitosis. Its molecular control involves ESCRT-III, PI(3,4)P2 signaling, and formin-mediated actin assembly, and its dysregulation is linked to senescence and cataract. Continued research using CRISPR models and advanced imaging will clarify how abscission timing is regulated in health and disease.
References
- 3. Gulluni F et al.. 2021. PI(3,4)P2-mediated cytokinetic abscission prevents early senescence and cataract formation.. Science 374(6573):eabk0410 PMID: 34882480
- 4. Higashi T et al.. 2019. Comprehensive analysis of formin localization in Xenopus epithelial cells.. Mol Biol Cell 30(1):82-95 PMID: 30379611
- 5. Lu Q et al.. 2019. Ascidian notochord elongation.. Dev Biol 448(2):147-153 PMID: 30458170
- 6. Richard A et al.. 2024. Methylation of ESCRT-III components regulates the timing of cytokinetic abscission.. Nat Commun 15(1):4023 PMID: 38740816
