GO:0071459 protein localization to chromosome, centromeric region: Components, Assembly and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0071459 describes the biological process by which proteins are transported to, or maintained at, the centromeric region of a chromosome.
• Centromeric protein localization is essential for kinetochore assembly, chromosome segregation, and genome stability.
• CENP-A, CENP-C, CENP-E, BubR1, and DNAJC9 are among the key proteins whose centromeric localization is experimentally validated [4,6,7].
• Disruption of centromeric protein localization causes chromosomal instability, aneuploidy, and reproductive isolation in model organisms [5,7].
• DNA methylation and histone modifications such as H3K9me3 regulate centromere positioning and protein recruitment [1,2].
• CRISPR knockout, point mutation, knock-in, and overexpression models are powerful tools to dissect centromeric protein function [6,7].
Description
The centromere is the chromosomal locus where the kinetochore assembles to mediate spindle attachment and accurate chromosome segregation. The process by which proteins are delivered to and retained at this region is formally described by the Gene Ontology term GO:0071459, protein localization to chromosome, centromeric region. This process is fundamental to mitosis and meiosis, and its dysregulation is linked to chromosomal instability and aneuploidy [5,7]. Understanding how proteins such as CENP-A, CENP-C, and CENP-E reach the centromere has become a central question in chromosome biology [4,6]. Recent studies have revealed that centromeric protein localization depends on oligomerization, histone supply chains, and epigenetic marks [1,6,7]. For researchers, GO:0071459 provides a framework to study the molecular machines that build and maintain the centromere-kinetochore interface. This article synthesizes authoritative QuickGO data and verified PubMed literature to explain the components, mechanisms, and research methods associated with this term.
protein localization to chromosome, centromeric region At A Glance
| GO ID | GO:0071459 |
|---|---|
| GO term | protein localization to chromosome, centromeric region |
| Ontology | biological_process |
| Synonym | protein localization to centromere; protein localisation to chromosome, centromeric region; protein localization to chromosome, centric region |
| Major function | Transport and maintenance of proteins at the centromeric region of chromosomes |
| Related cellular component | Centromere, kinetochore, outer corona |
| Key proteins | CENP-A, CENP-C, CENP-E, BubR1, DNAJC9 |
| Associated processes | Kinetochore assembly, chromosome segregation, mitotic checkpoint |
| Disease relevance | Chromosomal instability, aneuploidy, cancer, reproductive isolation |
What Is GO:0071459?
GO:0071459 is defined as any process in which a protein is transported to, or maintained at, the centromeric region of a chromosome. It encompasses both the active delivery of proteins to the centromere and the mechanisms that retain them there. This term is a biological process and is distinct from broader chromosome localization terms because it specifically refers to the centromeric region.
Why Is protein localization to chromosome, centromeric region Important in Cell Biology?
Protein localization to the centromeric region is essential for faithful chromosome segregation during cell division. Without proper centromeric recruitment of kinetochore proteins, cells cannot attach to the mitotic spindle, leading to aneuploidy and cell death [5,7]. This process is also critical for meiotic chromosome segregation, and its disruption can cause reproductive isolation. In cancer, mislocalization of centromeric proteins contributes to chromosomal instability, a hallmark of tumorigenesis. Therefore, understanding GO:0071459 has broad implications for basic cell biology, developmental biology, and disease research [6,7].
• Ensures accurate chromosome segregation during mitosis and meiosis.
• Prevents aneuploidy and chromosomal instability, which are hallmarks of cancer.
• Required for kinetochore assembly and spindle attachment [4,6].
• Disruption causes reproductive isolation in mice, linking centromere biology to speciation.
• Regulated by epigenetic marks such as H3K9me3 and DNA methylation [1,2].
• Involves quality control of histone supply chains via DNAJC9.
• Targeted by CRISPR models to study gene function in centromere biology [6,7].
• Relevant to oocyte meiosis and spindle-associated protein activation.
• Provides insights into centromere positioning and function in human cells.
• Offers potential therapeutic targets for cancers with chromosomal instability.
What Happens During protein localization to chromosome, centromeric region?
Recognition of the Centromeric Region
In simple terms: The cell marks the centromere so proteins know where to go.
The centromeric region is epigenetically defined by the histone H3 variant CENP-A and specific histone modifications such as H3K9me3 [1,6]. DNA methylation also influences centromere positioning and function, helping to establish the region where proteins will localize. This epigenetic landscape creates a landing pad for centromeric proteins [1,2].
Recruitment of CENP-A and CENP-C
In simple terms: Special proteins are delivered to the centromere to build the kinetochore.
CENP-A is deposited at the centromere and serves as a foundation for kinetochore assembly. CENP-C oligomerization is required for centromere/kinetochore assembly, and its recruitment depends on CENP-A. DNAJC9 maintains the fidelity of histone supply chains to prevent CENP-A mislocalization.
Outer Corona and Kinetochore Protein Recruitment
In simple terms: More proteins join the centromere to connect with the spindle.
CENP-E is recruited to the outer corona at mitotic onset via a conserved region that mediates BubR1-independent recruitment. This step is critical for chromosome congression and spindle checkpoint signaling. The outer corona serves as a platform for additional kinetochore proteins.
Maintenance and Quality Control
In simple terms: The cell checks that the right proteins stay at the centromere.
DNAJC9 prevents CENP-A mislocalization and chromosomal instability by maintaining histone supply chain fidelity. Condensin dysfunction can disrupt centromeric protein localization and cause reproductive isolation. Spindle-associated proteins in oocytes are locally activated to ensure proper centromere function.
Key Genes Involved in GO:0071459 protein localization to chromosome, centromeric region
The following genes and proteins are experimentally validated to play key roles in protein localization to the centromeric region.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CENP-A | Centromeric histone H3 variant; foundation for kinetochore assembly | Essential for centromere identity and protein recruitment |
| CENP-C | Kinetochore assembly via oligomerization | Required for centromere/kinetochore assembly |
| CENP-E | Outer corona recruitment at mitotic onset | Mediates BubR1-independent recruitment |
| BubR1 | Mitotic checkpoint kinase | Interacts with CENP-E at kinetochore |
| DNAJC9 | Histone chaperone; maintains histone supply chain fidelity | Prevents CENP-A mislocalization |
| Condensin | Chromosome condensation complex | Dysfunction causes reproductive isolation |
| H3K9me3 | Repressive histone mark | Drives chromatin compartmentalization |
| H3K14ub | Histone ubiquitination mark | Conserved driver of H3K9me3 |
| DNA methyltransferase | DNA methylation machinery | Influences centromere positioning |
| Spindle-associated proteins | Spindle assembly and function | Locally activated in oocytes |
| Aurora B | Chromosomal passenger kinase | Regulates kinetochore-microtubule attachments |
| MCAK | Kinesin-13 depolymerase | Regulates centromeric microtubule dynamics |
| Ndc80 complex | Kinetochore-microtubule attachment | Core kinetochore component |
| Knl1 | Kinetochore scaffold | Recruits checkpoint proteins |
| Zwint | Kinetochore protein | Required for kinetochore assembly |
| CENP-T | Centromeric protein | Contributes to kinetochore structure |
| CENP-W | Centromeric protein | Part of CENP-T complex |
How Is protein localization to chromosome, centromeric region Regulated?
The process of protein localization to the centromeric region is regulated by epigenetic marks such as H3K9me3 and H3K14ub, which drive chromatin compartmentalization. DNA methylation influences centromere positioning and function, thereby affecting protein recruitment. The histone supply chain, monitored by DNAJC9, ensures that CENP-A is correctly localized and prevents mislocalization. Additionally, phosphatase-driven mechanisms locally activate spindle-associated proteins in oocytes, contributing to proper centromere function.
protein localization to chromosome, centromeric region and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| DNAJC9 | Chromosomal instability, cancer | Knockout HeLa cells |
| CENP-A | Aneuploidy, cancer | Overexpression in cancer cell lines |
| Condensin | Reproductive isolation | Mouse knockout models |
| CENP-E | Mitotic defects, cancer | Point mutation knock-in |
| Spindle proteins | Oocyte aneuploidy, infertility | Oocyte-specific knockout |
Chromosomal Instability and Cancer
Mislocalization of centromeric proteins such as CENP-A leads to chromosomal instability, a hallmark of cancer. DNAJC9 depletion causes CENP-A mislocalization and chromosomal instability, suggesting that defects in histone supply chains contribute to tumorigenesis. Targeting these pathways may offer therapeutic opportunities for cancers with aneuploidy.
Reproductive Isolation and Speciation
Condensin dysfunction disrupts centromeric protein localization and causes reproductive isolation in mice, linking centromere biology to speciation. This suggests that centromere dysfunction can act as a reproductive barrier.
Oocyte Meiosis and Infertility
Spindle-associated proteins are locally activated in oocytes to ensure proper centromere function during meiosis. Defects in this process may contribute to oocyte aneuploidy and infertility.
From protein localization to chromosome, centromeric region-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does DNAJC9 prevent CENP-A mislocalization? | DNAJC9 knockout cell line |
| Is CENP-C oligomerization required for kinetochore assembly? | CENP-C point mutant knock-in |
| How does CENP-E recruit to outer corona? | CENP-E truncation knock-in |
| Does condensin dysfunction cause reproductive isolation? | Condensin knockout mouse |
| How does DNA methylation affect centromere positioning? | DNMT knockout human cells |
| What is the role of H3K9me3 in centromere function? | H3K9me3 mutant knock-in |
How to Study the protein localization to chromosome, centromeric region Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Fluorescence microscopy | Protein localization at centromere | Visualizing CENP-A recruitment |
| Live-cell imaging | Dynamics of protein recruitment | CENP-E outer corona recruitment |
| ChIP-seq | Genomic mapping of centromeric proteins | CENP-A localization |
| Mass spectrometry | Protein interactions at centromere | Kinetochore composition |
| CRISPR knockout | Gene requirement for localization | DNAJC9 function |
| CRISPR knock-in | Effect of point mutations | CENP-C oligomerization |
| DNA methylation profiling | Epigenetic regulation of centromere | Centromere positioning |
| RNA-seq | Transcriptional changes upon perturbation | Condensin dysfunction |
Imaging-Based Localization Studies
Fluorescence microscopy and live-cell imaging are used to visualize the recruitment of fluorescently tagged proteins to the centromere [4,6]. These methods reveal the timing and dynamics of protein localization during mitosis.
Proteomics and Interaction Studies
Affinity purification coupled with mass spectrometry identifies proteins that localize to the centromere and their interaction partners. This approach has been used to define the composition of the kinetochore and outer corona [4,6].
Genomic and Epigenomic Approaches
Chromatin immunoprecipitation followed by sequencing (ChIP-seq) maps the localization of centromeric proteins and histone modifications across the genome [1,2]. DNA methylation profiling reveals how epigenetic marks influence centromere positioning.
Functional Perturbation with CRISPR
CRISPR knockout, point mutation, and knock-in models are used to test the requirement of specific genes and residues for centromeric protein localization [6,7]. These models provide causal evidence for gene function [6,7].
How CRISPR Can Be Used to Study GO:0071459 protein localization to chromosome, centromeric region
Knockout
CRISPR knockout of genes such as DNAJC9 and CENP-C has been used to demonstrate their essential roles in centromeric protein localization and chromosome segregation [6,7]. Knockout cell lines show mislocalization of CENP-A and increased chromosomal instability.
Point Mutation
Point mutations in CENP-C or CENP-E can be introduced to test the requirement of specific residues for centromeric localization [4,6]. For example, mutations in the conserved CENP-E region abolish outer corona recruitment.
Knock-in
Knock-in of fluorescent tags or epitope tags allows real-time tracking of centromeric proteins in live cells [4,6]. Tagged CENP-A and CENP-C knock-in lines are widely used to study kinetochore assembly.
Overexpression
Overexpression of CENP-A or other centromeric proteins can cause mislocalization and chromosomal instability, modeling cancer-associated aneuploidy [6,7]. Overexpression models help identify dosage-sensitive components.
How EDITGENE Supports protein localization to chromosome, centromeric region Research
Researchers studying protein localization to chromosome, centromeric region-related genes often need to determine whether a candidate gene is causally involved in centromere function or is merely correlated with it. EDITGENE provides a comprehensive suite of CRISPR-based services to enable such causal studies.
Contact EDITGENE today to design your custom CRISPR model for protein localization to chromosome, centromeric region research.
Frequently Asked Questions About protein localization to chromosome, centromeric region
What is GO:0071459?
GO:0071459 is the Gene Ontology term for protein localization to chromosome, centromeric region, defined as any process in which a protein is transported to, or maintained at, the centromeric region of a chromosome.
What genes are involved in protein localization to chromosome, centromeric region?
Key genes include CENP-A, CENP-C, CENP-E, BubR1, DNAJC9, and condensin, among others [4,6,7].
Why is centromeric protein localization important?
It ensures accurate chromosome segregation during cell division and prevents aneuploidy and chromosomal instability [6,7].
What diseases are linked to defects in centromeric protein localization?
Defects are linked to cancer, chromosomal instability, reproductive isolation, and oocyte aneuploidy [5,7,8].
How is protein localization to the centromere regulated?
It is regulated by epigenetic marks such as H3K9me3 and DNA methylation, as well as histone supply chains [1,2,7].
What methods are used to study centromeric protein localization?
Common methods include fluorescence microscopy, ChIP-seq, mass spectrometry, and CRISPR-based perturbations [4,6,7].
What is the role of CENP-A in centromere localization?
CENP-A is a centromeric histone H3 variant that serves as a foundation for kinetochore assembly and protein recruitment.
How does DNAJC9 affect centromeric protein localization?
DNAJC9 maintains histone supply chain fidelity and prevents CENP-A mislocalization and chromosomal instability.
Can CRISPR be used to study centromeric protein localization?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models are widely used to dissect gene function in centromere biology [6,7].
What is the connection between centromere dysfunction and speciation?
Condensin dysfunction disrupts centromeric protein localization and causes reproductive isolation in mice, linking centromere biology to speciation.
Conclusion
GO:0071459, protein localization to chromosome, centromeric region, is a fundamental biological process that ensures proper chromosome segregation and genome stability. Key proteins such as CENP-A, CENP-C, CENP-E, and DNAJC9 are recruited to the centromere through mechanisms involving epigenetic marks, oligomerization, and histone quality control [1,4,6,7]. Dysregulation of this process leads to chromosomal instability, cancer, and reproductive isolation [5,7]. CRISPR-based models are powerful tools to dissect the causal roles of genes in this process [6,7]. EDITGENE offers comprehensive services to support centromere research.
References
- 1. Huang Y et al.. 2025. A conserved H3K14ub-driven H3K9me3 for chromatin compartmentalization.. Nature 647(8090):786-797 PMID: 41094145
- 2. Salinas-Luypaert C et al.. 2025. DNA methylation influences human centromere positioning and function.. Nat Genet 57(10):2509-2521 PMID: 40908343
- 4. Weber J et al.. 2024. A conserved CENP-E region mediates BubR1-independent recruitment to the outer corona at mitotic onset.. Curr Biol 34(5):1133-1141.e4 PMID: 38354735
- 5. El Yakoubi W et al.. 2023. Condensin dysfunction is a reproductive isolating barrier in mice.. Nature 623(7986):347-355 PMID: 37914934
- 6. Hara M et al.. 2023. Centromere/kinetochore is assembled through CENP-C oligomerization.. Mol Cell 83(13):2188-2205.e13 PMID: 37295434
- 7. Balachandra V et al.. 2024. DNAJC9 prevents CENP-A mislocalization and chromosomal instability by maintaining the fidelity of histone supply chains.. EMBO J 43(11):2166-2197 PMID: 38600242
- 8. Wan X et al.. 2025. Identification of locally activated spindle-associated proteins in oocytes uncovers a phosphatase-driven mechanism.. J Cell Sci 138(22) PMID: 41047934
