GO:0000779 condensed chromosome, centromeric region: Components, Assembly and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0000779 describes the centromeric region of a condensed chromosome, including the centromere and its associated kinetochore proteins.
• The chromosome passenger complex (CPC) is a master regulator of centromeric function and chromosome condensation during mitosis.
• Condensin complexes drive chromosome condensation and their dysfunction can cause reproductive isolation in mammals.
• Centromere organization is influenced by electrostatic repulsion and phase-separated condensates at pericentromeric heterochromatin.
• Cohesin and its regulator Sororin preserve sister-chromatid cohesion at the centromere, a process essential for accurate chromosome segregation.
• CRISPR-based knockout, knock-in, and overexpression models enable functional dissection of centromeric genes in cancer and developmental biology.
Description
The centromeric region of a condensed chromosome (GO:0000779) is a specialized chromatin domain that ensures faithful chromosome segregation during cell division. It encompasses the centromere and the kinetochore, a proteinaceous structure that attaches chromosomes to spindle microtubules. This region is critical for maintaining genomic stability, and its dysfunction is linked to aneuploidy, cancer, and developmental disorders. In monocentric chromosomes, the centromeric region is a single discrete area, whereas in holocentric chromosomes it is distributed along the chromosome. Understanding the molecular composition and regulation of this region is essential for researchers studying mitosis, meiosis, and chromosome biology. Recent studies have revealed that centromere organization involves electrostatic repulsion and condensation-dependent multivalent interactions. Moreover, condensin dysfunction at the centromere can act as a reproductive isolating barrier in mice, highlighting its evolutionary significance. This article synthesizes current knowledge on the structure, function, and research methods for GO:0000779, providing a resource for biomedical researchers.
condensed chromosome, centromeric region At A Glance
| GO ID | GO:0000779 |
|---|---|
| GO term | condensed chromosome, centromeric region |
| Ontology | cellular_component |
| Synonym | condensed chromosome, centric region; condensed chromosome, centromere; condensed chromosome, pericentric region; condensed nuclear chromosome, centromeric region |
| Major function | Chromosome segregation, kinetochore assembly, spindle attachment |
| Definition | The region of a condensed chromosome that includes the centromere and associated proteins, including the kinetochore. |
| Related processes | Mitosis, meiosis, chromosome condensation, sister-chromatid cohesion |
| Key proteins | CENP-A, CENP-R, CPC (Aurora B, INCENP, Survivin, Borealin), Condensin, Cohesin, Sororin, EB1 |
What Is GO:0000779?
GO:0000779, condensed chromosome, centromeric region, is defined as the region of a condensed chromosome that includes the centromere and associated proteins, including the kinetochore. In monocentric chromosomes, this region corresponds to a single area of the chromosome, whereas in holocentric chromosomes, it is evenly distributed along the chromosome. This cellular component term captures the structural and functional domain that mediates chromosome attachment to the spindle apparatus and ensures proper segregation during cell division.
Why Is condensed chromosome, centromeric region Important in Cell Biology?
The centromeric region of condensed chromosomes is fundamental to genome stability, as it ensures that each daughter cell receives an accurate complement of chromosomes during division. Errors in centromere function lead to aneuploidy, a hallmark of cancer and developmental disorders. Recent research has shown that condensin dysfunction at the centromere can drive reproductive isolation, underscoring its evolutionary importance. Additionally, phase-separated condensates at pericentromeric heterochromatin regulate transcription and genome architecture. Thus, studying GO:0000779 provides insights into basic cell biology and human disease mechanisms.
• Ensures faithful chromosome segregation and prevents aneuploidy.
• Dysfunction is linked to cancer, infertility, and developmental disorders.
• Condensin mutations cause reproductive isolation in mice.
• Centromeric phase separation regulates gene expression in cancer cells.
• H3K9 methylation inheritance at pericentromeric regions affects genome architecture.
• Cohesin and Sororin maintain sister-chromatid cohesion at centromeres.
• Electrostatic repulsion model explains centromere organization.
• EB1 and CENP-R condensation regulates chromosome oscillations.
• Target for CRISPR-based functional genomics in cancer research.
• Provides evolutionary insights into holocentric vs monocentric chromosomes.
What Happens During condensed chromosome, centromeric region?
Chromosome Condensation and Centromere Specification
In simple terms: The cell packs its DNA tightly and marks the center of each chromosome.
During mitosis, condensin complexes drive chromosome condensation, while the centromere is specified by the histone H3 variant CENP-A. The chromosome passenger complex (CPC) regulates condensation and centromere function. Condensin dysfunction leads to defective chromosome condensation and can cause reproductive isolation. The electrostatic repulsion model suggests that centromere organization arises from charged interactions between chromatin and proteins.
Kinetochore Assembly and Spindle Attachment
In simple terms: A protein machine builds on the centromere to grab the spindle fibers.
The kinetochore assembles at the centromeric region and attaches to spindle microtubules. EB1 and CENP-R undergo condensation-dependent multivalent interactions that regulate chromosome oscillations. This attachment is essential for chromosome alignment and segregation.
Sister-Chromatid Cohesion and Resolution
In simple terms: Sister chromosomes are glued together until it is time to separate.
Cohesin rings hold sister chromatids together, and Sororin locks the DNA-exit gate of cohesin to preserve cohesion. At the centromere, cohesion is protected until anaphase, when it is cleaved to allow segregation.
Pericentromeric Heterochromatin and Phase Separation
In simple terms: The area around the centromere forms gel-like droplets that control gene activity.
Pericentromeric heterochromatin contains H3K9 methylation, which is inherited to regulate genome architecture. TEAD1 condensates form transcriptionally inactive storage sites on pericentromeric heterochromatin in cancer cells. These phase-separated condensates influence chromatin organization and gene expression.
Key Genes Involved in GO:0000779 condensed chromosome, centromeric region
The following genes and proteins are key components or regulators of the condensed chromosome, centromeric region (GO:0000779).
| Gene | Major Role | Research Relevance |
|---|---|---|
| CENP-A | Centromere-specific histone H3 variant | Epigenetic mark of centromere identity |
| Aurora B | Chromosome passenger complex kinase | Regulates condensation and error correction |
| INCENP | CPC scaffold protein | Required for CPC localization and function |
| Survivin | CPC subunit | Involved in mitosis and apoptosis |
| Borealin | CPC subunit | Essential for centromere targeting |
| Condensin | Chromosome condensation complex | Dysfunction causes reproductive isolation |
| Cohesin | Sister-chromatid cohesion ring | Maintains cohesion at centromeres |
| Sororin | Cohesin regulator | Locks cohesin to preserve cohesion |
| EB1 | Microtubule plus-end tracking protein | Regulates chromosome oscillations |
| CENP-R | Kinetochore protein | Condensation-dependent interactions |
| TEAD1 | Transcription factor | Forms condensates on pericentromeric heterochromatin |
| H3K9 methyltransferase | Enzyme for heterochromatin mark | Inheritance regulates genome architecture |
| CENP-B | Centromeric DNA-binding protein | Centromere organization |
| CENP-C | Kinetochore assembly factor | Essential for kinetochore function |
| Ndc80 complex | Microtubule-binding kinetochore component | Spindle attachment |
| Mad2 | Spindle assembly checkpoint protein | Monitors kinetochore attachment |
| BubR1 | Spindle assembly checkpoint kinase | Ensures accurate segregation |
How Is condensed chromosome, centromeric region Regulated?
The centromeric region is regulated by phosphorylation and methylation events. Aurora B kinase in the CPC phosphorylates kinetochore substrates to correct erroneous attachments. Condensin activity is regulated by phosphorylation and ATP hydrolysis. Sororin is regulated by phosphorylation to control cohesin stability. H3K9 methylation at pericentromeric heterochromatin is inherited epigenetically and influences genome architecture. Phase separation of TEAD1 condensates is regulated by multivalent interactions and can be modulated by transcriptional activity.
condensed chromosome, centromeric region and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| Aurora B | Cancer, aneuploidy | Knockout in cancer cell lines |
| Condensin | Reproductive isolation | Knock-in mouse models |
| Cohesin | Cornelia de Lange syndrome | Point mutation knock-in |
| TEAD1 | Cancer | Overexpression in cancer cells |
| Sororin | Infertility | Knockout in mouse oocytes |
Cancer and Aneuploidy
Centromere dysfunction leads to chromosome missegregation and aneuploidy, a hallmark of cancer. Overexpression of Aurora B and other CPC components is observed in many cancers. TEAD1 condensates on pericentromeric heterochromatin are transcriptionally inactive storage sites in cancer cells, suggesting a role in oncogenic gene regulation.
Reproductive Isolation and Infertility
Condensin dysfunction at the centromere causes reproductive isolation in mice, indicating that centromere evolution can drive speciation. Cohesin mutations are linked to infertility and developmental disorders.
Developmental Disorders
Mutations in cohesin and condensin genes cause developmental syndromes such as Cornelia de Lange syndrome. Defects in centromere function can lead to microcephaly and growth retardation.
From condensed chromosome, centromeric region-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate centromere condensation? | Knockout cell line |
| Does mutation Y affect kinetochore assembly? | Point mutation knock-in |
| Does overexpression of Z drive aneuploidy? | Overexpression cell model |
| Does tag affect localization of CENP-A? | Tagged knock-in |
| Does condensin dysfunction cause reproductive isolation? | Knock-in mouse |
| Does H3K9 methylation inheritance affect genome architecture? | Knockout Drosophila |
How to Study the condensed chromosome, centromeric region Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Live-cell imaging | Chromosome dynamics | Kinetochore oscillations |
| ChIP-seq | Protein-DNA binding | Centromere mapping |
| Mass spectrometry | Protein interactions | Kinetochore composition |
| CRISPR screen | Gene essentiality | Segregation regulators |
| FISH | Chromosome copy number | Aneuploidy detection |
| FRAP | Protein turnover | Centromere dynamics |
| Electron microscopy | Ultrastructure | Condensation state |
Imaging and Live-Cell Microscopy
Fluorescence microscopy of GFP-tagged centromeric proteins allows visualization of kinetochore dynamics and chromosome oscillations. Live-cell imaging can track condensation and segregation in real time.
Chromatin Immunoprecipitation and Sequencing
ChIP-seq for CENP-A and H3K9me identifies centromeric and pericentromeric regions. This method reveals epigenetic inheritance and genome architecture.
Proteomics and Interaction Studies
Mass spectrometry of kinetochore complexes identifies novel components and post-translational modifications. Proximity labeling can map centromere-associated proteins.
CRISPR Screens and Functional Genomics
Genome-wide CRISPR knockout screens identify genes required for chromosome segregation and centromere function. Pooled screens with FACS-based readouts can uncover regulators of aneuploidy.
How CRISPR Can Be Used to Study GO:0000779 condensed chromosome, centromeric region
Knockout
CRISPR knockout of centromeric genes such as Aurora B or condensin subunits reveals their essential roles in mitosis and chromosome segregation. Knockout cell lines are used to study aneuploidy and cancer.
Point Mutation
Point mutations in cohesin or condensin genes can mimic human disease alleles, allowing functional dissection of centromere dysfunction. Knock-in of phospho-mutant Aurora B reveals regulation of error correction.
Knock-in
Tagged knock-in of CENP-A or CENP-R enables live-cell imaging and proteomic analysis of centromeric complexes. Knock-in of H3K9 methyltransferase reporters tracks epigenetic inheritance.
Overexpression
Overexpression of TEAD1 or Aurora B in cancer cells models oncogenic centromere dysfunction and identifies therapeutic targets. Overexpression of Sororin stabilizes cohesin and affects cohesion.
How EDITGENE Supports condensed chromosome, centromeric region Research
Researchers studying condensed chromosome, centromeric region-related genes often need to determine whether a candidate gene is causally involved in centromere function, chromosome segregation, or disease. EDITGENE provides comprehensive CRISPR services to generate precisely engineered cell models for such functional studies.
Contact EDITGENE today to design your custom CRISPR model for condensed chromosome, centromeric region research.
Frequently Asked Questions About condensed chromosome, centromeric region
What is GO:0000779?
GO:0000779 is the Gene Ontology term for the condensed chromosome, centromeric region, which includes the centromere and kinetochore.
What genes are involved in condensed chromosome, centromeric region?
Key genes include CENP-A, Aurora B, INCENP, Survivin, Borealin, Condensin, Cohesin, Sororin, EB1, and CENP-R.
What is the function of the centromeric region?
It ensures chromosome attachment to spindle microtubules and faithful segregation during cell division.
How is the centromeric region regulated?
It is regulated by phosphorylation, methylation, and phase separation.
What diseases are linked to centromere dysfunction?
Cancer, aneuploidy, infertility, and developmental disorders such as Cornelia de Lange syndrome.
What methods are used to study GO:0000779?
Live-cell imaging, ChIP-seq, mass spectrometry, and CRISPR screens.
What is the chromosome passenger complex?
A complex of Aurora B, INCENP, Survivin, and Borealin that regulates centromere function and condensation.
How does condensin dysfunction affect reproduction?
It can cause reproductive isolation in mice by disrupting chromosome segregation.
What is the role of Sororin in centromeres?
Sororin locks the DNA-exit gate of cohesin to preserve sister-chromatid cohesion.
How can CRISPR help study centromeric genes?
CRISPR knockout, knock-in, and overexpression models enable functional dissection of centromeric genes.
Conclusion
The condensed chromosome, centromeric region (GO:0000779) is a critical cellular component that ensures genome stability through precise chromosome segregation. Its molecular players, including the CPC, condensin, cohesin, and kinetochore proteins, are tightly regulated and linked to cancer, infertility, and developmental disorders. Advanced CRISPR models and imaging techniques continue to unravel its complexity, offering new therapeutic targets. EDITGENE provides essential tools for researchers to explore this dynamic region.
References
- 1. Trivedi P et al.. 2020. A Condensed View of the Chromosome Passenger Complex.. Trends Cell Biol 30(9):676-687 PMID: 32684321
- 2. El Yakoubi W et al.. 2023. Condensin dysfunction is a reproductive isolating barrier in mice.. Nature 623(7986):347-355 PMID: 37914934
- 3. Bell C et al.. 2025. An electrostatic repulsion model of centromere organisation.. bioRxiv PMID: 40950056
- 4. Wang Y et al.. 2026. TEAD1 condensates are transcriptionally inactive storage sites on the pericentromeric heterochromatin in cancer cells.. Nat Cell Biol 28(7):1480-1495 PMID: 42277434
- 5. Atinbayeva N et al.. 2024. Inheritance of H3K9 methylation regulates genome architecture in Drosophila early embryos.. EMBO J 43(13):2685-2714 PMID: 38831123
- 6. Hu C et al.. 2025. Condensation-dependent multivalent interactions of EB1 and CENP-R regulate chromosome oscillations in mitosis.. Cell Rep 44(5):115560 PMID: 40349345
- 7. Chen Q et al.. 2026. Sororin locks the DNA-exit gate of cohesin to preserve sister-chromatid cohesion.. Nat Commun 17(1) PMID: 41807408
- 8. Wang M et al.. 2025. Molecular mechanism targeting condensin for chromosome condensation.. EMBO J 44(3):705-735 PMID: 39690240
