GO:0051301 cell division: Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0051301 (cell division) is the biological process that partitions cellular components to form new cells, and it may or may not include physical separation into distinct membrane-bounded daughter cells.
• Cell division is driven by conserved machinery including cyclin-dependent kinases, microtubule motors, actomyosin contractility, and checkpoint signaling.
• Asymmetric cell division generates daughter cells with different fates and is central to stem cell biology, development, and tumor heterogeneity.
• Proteomic and biochemical dissection of mitotic complexes has revealed dynamic protein interactions that coordinate chromosome segregation and cytokinesis.
• Deregulated cell division underlies cancer, and altered division modes contribute to stem cell exhaustion and tissue degeneration.
• CRISPR knockout, point mutation, knock-in, and overexpression models enable causal testing of cell division genes in human cells.
Description
Cell division (GO:0051301) is the fundamental biological process by which a cell partitions its components to produce new cells, and it may or may not culminate in the physical separation of a cell into distinct, individually membrane-bounded daughter cells. This process is essential for proliferation, tissue homeostasis, and development across eukaryotes, and its dysregulation is a hallmark of cancer and other proliferative disorders. Historically, cell division has been studied through cytology, biochemistry, and genetics, with early work establishing the basic principles of mitotic chromosome behavior and cytokinesis. Modern research has moved toward a systems-level understanding of the molecular machines that execute division, including the kinetochore, spindle apparatus, and contractile ring. Because division must be tightly coordinated with growth, DNA replication, and differentiation, it is regulated by checkpoints and signaling networks that ensure genomic fidelity. Asymmetric cell division further diversifies cell fates and is critical for stem cell self-renewal and lineage specification. Consequently, cell division remains a central topic in cell biology, cancer research, and regenerative medicine.
cell division At A Glance
| GO ID | GO:0051301 |
|---|---|
| GO term | cell division |
| Ontology | biological_process |
| Synonym | None |
| Major function | Partitioning of cellular components to form new cells, with or without physical separation into distinct membrane-bounded daughter cells |
| Key cellular structures | Mitotic spindle, kinetochore, contractile ring, midbody |
| Core molecular drivers | Cyclin-dependent kinases, microtubule motors, actomyosin, checkpoint kinases |
| Associated processes | Mitosis, meiosis, cytokinesis, asymmetric cell division |
| Disease relevance | Cancer, stem cell disorders, developmental defects |
What Is GO:0051301?
According to the Gene Ontology, GO:0051301 (cell division) is defined as the process resulting in division and partitioning of components of a cell to form more cells; it may or may not be accompanied by the physical separation of a cell into distinct, individually membrane-bounded daughter cells. In practice, this encompasses the coordinated events of nuclear division (mitosis or meiosis) and cytoplasmic division (cytokinesis), as well as the regulatory checkpoints that ensure accurate chromosome segregation and daughter cell formation.
Why Is cell division Important in Cell Biology?
Cell division is essential for life, enabling growth, tissue repair, and reproduction, and its precise regulation ensures genomic stability. Errors in division lead to aneuploidy, which is a hallmark of cancer and developmental disorders. Understanding the molecular mechanisms of cell division provides targets for anticancer therapies and insights into stem cell biology and regenerative medicine.
• Cell division is required for tissue homeostasis and organismal growth.
• Asymmetric division generates cellular diversity during development.
• Deregulated division drives tumor initiation and progression.
• Checkpoint defects cause aneuploidy and genomic instability.
• Stem cell division modes influence tissue regeneration and aging.
• Cell division machinery is a target for chemotherapeutic drugs.
• Proteomic studies of division reveal dynamic protein networks.
• Endoreduplication, a variant of the cell cycle, affects plant growth and crop yield.
• Understanding division mechanisms aids in synthetic biology and tissue engineering.
• Division defects are linked to neurodevelopmental disorders.
What Happens During cell division?
Mitotic entry and chromosome condensation
In simple terms: The cell prepares to divide by condensing its DNA into compact chromosomes.
Mitotic entry is triggered by activation of cyclin-dependent kinase 1 (CDK1) in complex with cyclin B, which phosphorylates substrates to drive chromosome condensation, nuclear envelope breakdown, and spindle assembly. This transition is tightly regulated by checkpoint kinases such as Aurora A and PLK1, which ensure that mitosis begins only after DNA replication is complete and damage is repaired.
Spindle assembly and chromosome segregation
In simple terms: A molecular machine pulls duplicated chromosomes apart.
The mitotic spindle, composed of microtubules and motor proteins, attaches to kinetochores on sister chromatids and segregates them to opposite poles. Key components include tubulin, dynein, kinesins, and the chromosomal passenger complex, which correct attachment errors and regulate the spindle assembly checkpoint.
Cytokinesis and abscission
In simple terms: The cell physically splits into two daughter cells.
After chromosome segregation, an actomyosin contractile ring assembles at the equatorial cortex and constricts to form the cleavage furrow, a process regulated by RhoA and its effectors. The midbody forms at the intercellular bridge and is required for abscission, the final separation of daughter cells, which involves ESCRT machinery and membrane remodeling.
Asymmetric cell division
In simple terms: Some cells divide unequally to produce two different daughter cells.
Asymmetric cell division generates daughter cells with distinct fates by differentially segregating fate determinants, such as proteins and RNAs, during mitosis. This process is critical for stem cell self-renewal and differentiation, and its dysregulation is linked to cancer and tissue degeneration.
Key Genes Involved in GO:0051301 cell division
The following genes and proteins are core components and regulators of cell division, with well-documented roles in mitosis, cytokinesis, and checkpoint control.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CDK1 | Master kinase driving mitotic entry and progression | Target for cell cycle inhibitors; essential for division |
| CCNB1 | Regulatory subunit of CDK1; controls mitotic entry | Biomarker in cancer; target for degradation studies |
| AURKA | Spindle assembly and centrosome maturation | Oncogene; target for Aurora kinase inhibitors |
| PLK1 | Mitotic entry, spindle assembly, and cytokinesis | Therapeutic target in multiple cancers |
| BUB1 | Spindle assembly checkpoint kinase | Mutations cause aneuploidy; cancer predisposition |
| MAD2L1 | Spindle checkpoint component | Defects lead to chromosomal instability |
| RHO A | Regulator of actomyosin contractile ring | Key for cytokinesis; cancer cell invasion |
| ANLN | Actin-binding protein in contractile ring | Required for cytokinesis; overexpressed in tumors |
| ECT2 | RhoA guanine nucleotide exchange factor | Essential for cytokinesis; oncogenic potential |
| KIF11 | Eg5 kinesin; spindle bipolarity | Target for mitotic kinesin inhibitors |
| DYNC1H1 | Dynein heavy chain; spindle positioning | Mutations linked to neurodevelopmental disorders |
| NUMA1 | Spindle organization and nuclear reformation | Regulates asymmetric division |
| TPX2 | Spindle assembly factor; Aurora A activator | Overexpressed in cancers |
| CENPA | Centromere-specific histone H3 variant | Required for kinetochore assembly |
| INCENP | Chromosomal passenger complex component | Regulates chromosome segregation and cytokinesis |
| ESCRT-III | Membrane scission during abscission | Required for final separation of daughter cells |
| SEPT9 | Cytokinesis and scaffold protein | Implicated in cancer and neural development |
How Is cell division Regulated?
Cell division is regulated by a network of checkpoints and signaling pathways that ensure fidelity. The spindle assembly checkpoint (SAC) delays anaphase until all chromosomes are properly attached to the spindle, involving proteins such as BUB1, MAD2L1, and the chromosomal passenger complex. CDK1 activity is controlled by cyclin synthesis and degradation, and by inhibitory phosphorylation by WEE1 and activation by CDC25 phosphatases. Asymmetric division is regulated by polarity cues and spindle orientation, which are influenced by extracellular signals and cell fate determinants. Additionally, endoreduplication, a modified cell cycle, is regulated by plant-specific factors and affects growth.
cell division and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| AURKA | Cancer (breast, colon, leukemia) | Knockout and point mutation in cancer cell lines |
| PLK1 | Cancer (multiple solid tumors) | Overexpression and knockout in HeLa or HCT116 |
| BUB1 | Aneuploidy, cancer predisposition | Knockout in RPE1 or HCT116 cells |
| DYNC1H1 | Neurodevelopmental disorders | Knock-in of patient mutations in iPSC-derived neurons |
| SEPT9 | Cancer and neural tube defects | Knockout in neural stem cells |
Cancer and genomic instability
Deregulated cell division is a hallmark of cancer, where overexpression of mitotic kinases such as AURKA and PLK1 drives proliferation and chromosomal instability. Mutations in spindle checkpoint genes like BUB1 and MAD2L1 lead to aneuploidy and tumor progression. Targeting mitotic machinery with inhibitors is a therapeutic strategy in oncology.
Stem cell disorders and aging
Altered modes of stem cell division, particularly a shift from asymmetric to symmetric division, can lead to stem cell exhaustion or expansion, contributing to aging and tissue degeneration. Dysregulation of asymmetric division is also implicated in cancer stem cell maintenance.
Developmental and neurodevelopmental defects
Mutations in genes controlling spindle orientation and cytokinesis, such as DYNC1H1 and SEPT9, are associated with neurodevelopmental disorders and structural birth defects. Proper cell division is essential for brain development and tissue morphogenesis.
From cell division-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is a mitotic kinase essential for cell division? | CRISPR knockout in human cell lines (e.g., HeLa, RPE1) |
| Does a specific mutation affect spindle assembly? | Point mutation knock-in in endogenous locus |
| How does a gene contribute to cytokinesis? | Knock-in of fluorescent tag for live imaging |
| Does overexpression drive proliferation? | Doxycycline-inducible overexpression in cancer cells |
| What are the interaction partners during mitosis? | Affinity purification with tagged knock-in followed by mass spectrometry |
| Can a gene be targeted for cancer therapy? | CRISPR library screening for synthetic lethality |
How to Study the cell division Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Live-cell imaging | Spindle dynamics, chromosome segregation, cytokinesis | Assessing division defects in real time |
| Proteomics (LC-MS/MS) | Protein interactions and modifications during mitosis | Identifying novel mitotic regulators |
| CRISPR knockout screens | Genes essential for cell division | Discovering therapeutic targets |
| RNA-seq | Transcriptional changes during cell cycle | Cell cycle profiling |
| Phosphoproteomics | Kinase substrate identification | Mapping mitotic signaling |
| Flow cytometry | DNA content and cell cycle phase | Quantifying proliferation and aneuploidy |
| In vitro kinase assays | Enzymatic activity of mitotic kinases | Testing inhibitors |
Proteomics of cell division
Mass spectrometry-based proteomics enables the identification of protein complexes and post-translational modifications that change during mitosis, providing a systems view of division machinery. Affinity purification of tagged mitotic proteins followed by LC-MS/MS reveals dynamic interactomes.
Live-cell imaging
Fluorescence microscopy of GFP-tagged proteins and chromosome markers allows real-time visualization of spindle assembly, chromosome segregation, and cytokinesis in living cells. This method is essential for assessing division defects and dynamics.
Functional genomics screens
CRISPR knockout and RNAi screens identify genes required for cell division and viability, uncovering novel regulators and potential drug targets. High-content imaging of division phenotypes links genotype to function.
Biochemical assays
In vitro assays using purified proteins measure kinase activity, microtubule dynamics, and actin polymerization, providing mechanistic insights into division components.
How CRISPR Can Be Used to Study GO:0051301 cell division
Knockout
CRISPR knockout of cell division genes, such as AURKA or PLK1, results in mitotic arrest, apoptosis, or cytokinesis failure, confirming their essential roles. Knockout cell lines are valuable for studying gene function and for drug sensitivity testing.
Point Mutation
Introducing specific point mutations (e.g., kinase-dead or phospho-deficient) into endogenous genes via CRISPR allows precise dissection of signaling pathways in cell division without altering expression levels.
Knock-in
Knock-in of fluorescent tags (e.g., GFP) or epitope tags enables live imaging and proteomic analysis of division proteins at endogenous levels, revealing their localization and interactions.
Overexpression
CRISPR activation or inducible overexpression of cell division genes, such as AURKA, can model oncogenic transformation and test whether increased dosage drives proliferation or genomic instability.
How EDITGENE Supports cell division Research
Researchers studying cell division-related genes often need to determine whether a candidate gene is causally involved in proliferation, chromosome segregation, or cytokinesis. CRISPR-based models provide a robust way to test gene function in relevant cellular contexts, from knockout to precise point mutations and tagged knock-ins.
Contact EDITGENE today to design your custom CRISPR model for cell division research.
Frequently Asked Questions About cell division
What is GO:0051301?
GO:0051301 is the Gene Ontology term for cell division, defined as the process resulting in division and partitioning of components of a cell to form more cells, with or without physical separation into distinct membrane-bounded daughter cells.
What genes are involved in cell division?
Key genes include CDK1, CCNB1, AURKA, PLK1, BUB1, MAD2L1, RHO A, ANLN, ECT2, KIF11, DYNC1H1, NUMA1, TPX2, CENPA, INCENP, and SEPT9, among others.
How is cell division regulated?
Cell division is regulated by cyclin-dependent kinases, checkpoint kinases such as Aurora and PLK1, and the spindle assembly checkpoint, which ensure accurate chromosome segregation and cytokinesis.
What is asymmetric cell division?
Asymmetric cell division is a process that generates two daughter cells with different fates by differentially segregating fate determinants, important for stem cell self-renewal and development.
What diseases are linked to cell division defects?
Defects in cell division are linked to cancer, aneuploidy, stem cell disorders, and neurodevelopmental defects.
How can I study cell division genes with CRISPR?
CRISPR knockout, point mutation, knock-in, and overexpression models allow functional dissection of cell division genes in human cells.
What methods are used to study cell division?
Common methods include live-cell imaging, proteomics, CRISPR screens, RNA-seq, phosphoproteomics, and flow cytometry.
What is the role of Aurora kinase in cell division?
Aurora kinases regulate spindle assembly, centrosome maturation, and chromosome segregation, and are targets for cancer therapy.
What is the spindle assembly checkpoint?
The spindle assembly checkpoint is a surveillance mechanism that delays anaphase until all chromosomes are properly attached to the spindle, involving BUB1 and MAD2L1.
Why is cell division important for cancer research?
Cancer cells often exhibit deregulated division, and targeting mitotic machinery is a therapeutic strategy, making cell division a key area in oncology.
Conclusion
Cell division (GO:0051301) is a fundamental biological process that ensures the faithful partitioning of cellular components into new cells. Its molecular mechanisms involve a complex interplay of kinases, motors, and structural proteins that are conserved across eukaryotes. Dysregulation of division underlies cancer and other diseases, making it a critical area of research. CRISPR-based models provide powerful tools to dissect gene function and identify therapeutic targets in cell division.
References
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