GO:0048471 perinuclear region of cytoplasm: Components, Assembly and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0048471 (perinuclear region of cytoplasm) is a cellular component defined as the cytoplasm situated near, or occurring around, the nucleus.
• The perinuclear region is a hub for mRNA localization and localized translation, as shown for c-myc and metallothionein-1 mRNAs that are targeted there via cis-acting elements in their 3' untranslated regions.
• It concentrates intrinsically disordered proteins with predicted phase-separation capacity within a 3D network of cytoskeletal filaments and organelles.
• Signaling complexes such as BCL10 accumulate at the perinuclear region to mediate NF-kappaB activation.
• The perinuclear region is functionally important in specialized structures such as the sperm perinuclear theca, which is required for fertilization competence.
• Studying this compartment requires imaging, RNA localization assays, proteomics, and CRISPR-based perturbation of candidate genes.
Description
The perinuclear region of cytoplasm (GO:0048471) is a cellular component ontology term that describes the cytoplasm situated near, or occurring around, the nucleus. It is not a membrane-bound organelle but rather a spatially defined subcellular zone that concentrates specific RNAs, proteins, cytoskeletal elements, and organelles. This region has emerged as a functionally specialized compartment where mRNA localization, localized translation, signal transduction, and protein quality control intersect. For researchers, GO:0048471 provides a precise annotation term for imaging, proteomic, and transcriptomic studies that aim to resolve subcellular organization beyond the classical organelle inventory. Because the perinuclear region is enriched in intrinsically disordered proteins with predicted phase-separation behavior, it is also relevant to current efforts to understand biomolecular condensates and their roles in cell physiology and disease. In parallel, the perinuclear region is a site of pathological protein aggregation under stress conditions such as hydroxyurea-induced oxidative stress, linking this compartment to cellular stress responses and disease mechanisms.
perinuclear region of cytoplasm At A Glance
| GO ID | GO:0048471 |
|---|---|
| GO term | perinuclear region of cytoplasm |
| Ontology | cellular_component |
| Synonym | None |
| Definition | Cytoplasm situated near, or occurring around, the nucleus. |
| Major function | Spatial hub for mRNA localization, localized translation, signal transduction, and protein quality control. |
| Key molecular features | Enriched in intrinsically disordered proteins with predicted phase-separation capacity; associated with cytoskeletal filaments and organelles. |
| Representative RNAs | c-myc mRNA and metallothionein-1 mRNA are targeted to the perinuclear cytoplasm via 3' UTR cis-acting elements. |
| Disease relevance | Linked to oxidative stress-induced protein aggregation, NF-kappaB signaling, and sperm functional competence. |
What Is GO:0048471?
GO:0048471 (perinuclear region of cytoplasm) is defined by QuickGO as the cytoplasm situated near, or occurring around, the nucleus. In practical terms, it refers to the cytoplasmic zone immediately surrounding the nuclear envelope, including the cytoskeletal and organellar networks that occupy this space. It is distinct from the nucleoplasm and from the bulk cytoplasm, although its boundaries are operationally defined by proximity to the nucleus rather than by a membrane. This term is used to annotate gene products that localize to this region, such as mRNAs, signaling proteins, and cytoskeletal components.
Why Is perinuclear region of cytoplasm Important in Cell Biology?
The perinuclear region of cytoplasm is important because it organizes key cellular activities in space and time. Localizing mRNAs such as c-myc and metallothionein-1 to this region allows for localized translation and rapid responses to signals. The region also serves as a platform for assembling signaling complexes, as demonstrated by BCL10 accumulation required for NF-kappaB activation. In specialized cells, perinuclear structures such as the sperm perinuclear theca are essential for fertilization. Moreover, the perinuclear region is a site where disordered proteins and stress-induced aggregates accumulate, implicating it in proteinopathies and cellular stress responses. Understanding this compartment therefore has broad implications for cell biology, developmental biology, and disease research.
• Provides a spatial framework for mRNA localization and localized translation, as shown for c-myc and metallothionein-1 mRNAs.
• Concentrates intrinsically disordered proteins with phase-separation potential, linking it to biomolecular condensate biology.
• Serves as a signaling platform for NF-kappaB activation via BCL10 accumulation.
• Is a site of stress-induced protein aggregation, relevant to oxidative stress responses.
• Contains specialized structures such as the sperm perinuclear theca that are required for fertilization.
• Shows cell-type-specific composition, e.g., plectin distribution in glomerular visceral epithelial cells.
• Offers a target for imaging-based screens to map subcellular proteomes and RNA localizomes.
• Can be perturbed by CRISPR to test causal roles of localized genes in disease models.
What Happens During perinuclear region of cytoplasm?
mRNA localization to the perinuclear region
In simple terms: Certain mRNAs are actively moved to the area around the nucleus.
The perinuclear region is a destination for specific mRNAs. A localization signal in the 3' untranslated region of c-myc mRNA targets c-myc mRNA and beta-globin reporter sequences to the perinuclear cytoplasm and cytoskeletal-bound polysomes. Similarly, the 3' untranslated region of metallothionein-1 mRNA directs its perinuclear localization, and this element has been characterized as a cis-acting determinant. These findings establish that perinuclear mRNA targeting is an active, sequence-dependent process.
Localized translation and cytoskeletal association
In simple terms: mRNAs near the nucleus can be translated there, often attached to the cytoskeleton.
mRNAs localized to the perinuclear cytoplasm are associated with cytoskeletal-bound polysomes, suggesting that translation occurs in this subcellular zone. This coupling of mRNA localization and translation allows cells to concentrate protein synthesis near the nucleus, potentially facilitating efficient delivery of proteins to nuclear or perinuclear destinations.
Signaling complex assembly
In simple terms: Signaling proteins gather around the nucleus to turn on specific pathways.
The perinuclear region serves as a platform for assembling signaling complexes. Accumulation of BCL10 at the perinuclear region is required for BCL10-mediated nuclear factor-kappa B activation. This demonstrates that spatial concentration of signaling molecules in the perinuclear zone is functionally important for signal transduction.
Stress-induced protein aggregation
In simple terms: Under stress, proteins can clump together near the nucleus.
Hydroxyurea induces an oxidative stress response that triggers endoplasmic reticulum expansion and cytoplasmic protein aggregation, with aggregates forming in the perinuclear region. This links the perinuclear compartment to cellular stress responses and protein quality control.
Specialized perinuclear structures
In simple terms: Some cells build specialized structures around the nucleus for specific functions.
In sperm, the perinuclear theca is a specialized structure whose biogenesis is essential for sperm functional competence and fertilization. In rat glomerular visceral epithelial cells, plectin shows a perinuclear distribution that characterizes these cells. These examples illustrate cell-type-specific specialization of the perinuclear region.
Key Genes Involved in GO:0048471 perinuclear region of cytoplasm
The following genes and proteins have been experimentally linked to the perinuclear region of cytoplasm (GO:0048471) in the cited literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| MYC | c-myc mRNA localizes to perinuclear cytoplasm via a 3' UTR localization signal | Model for studying mRNA localization and localized translation |
| MT1 | Metallothionein-1 mRNA is targeted to perinuclear cytoplasm via a 3' UTR cis-acting element | Model for cis-acting RNA localization elements |
| BCL10 | Accumulates at the perinuclear region to mediate NF-kappaB activation | Model for spatial regulation of NF-kappaB signaling |
| PLEC | Plectin shows perinuclear distribution in glomerular visceral epithelial cells | Model for cytoskeletal linker localization in specialized cells |
| HBB | Beta-globin reporter sequences are targeted to perinuclear cytoplasm by the c-myc 3' UTR signal | Reporter for RNA localization studies |
| Disordered proteins with phase-separation potential | Concentrate in the perinuclear region within a 3D network of cytoskeletal filaments and organelles | Model for biomolecular condensate research |
| Proteins forming stress-induced aggregates | Aggregate in the perinuclear region upon hydroxyurea-induced oxidative stress | Model for protein aggregation and stress responses |
| Sperm perinuclear theca proteins | Form the perinuclear theca required for sperm functional competence and fertilization | Model for reproductive biology and fertilization |
| Cytoskeletal filaments | Form a 3D network in the perinuclear region | Model for cytoskeletal organization |
| Organelles | Distribute within the perinuclear 3D network | Model for organelle positioning |
| NF-kappaB pathway components | Activated downstream of perinuclear BCL10 accumulation | Model for signal transduction |
| Polysomes | Cytoskeletal-bound polysomes associate with perinuclear mRNAs | Model for localized translation |
| ER (endoplasmic reticulum) | Expands and participates in perinuclear aggregation under stress | Model for ER stress and expansion |
| Oxidative stress response proteins | Respond to hydroxyurea and trigger perinuclear aggregation | Model for oxidative stress |
| Glomerular visceral epithelial cell proteins | Show perinuclear distribution patterns | Model for kidney cell biology |
| Beta-globin (reporter) | Used as a reporter for perinuclear localization signals | Tool for RNA localization assays |
How Is perinuclear region of cytoplasm Regulated?
The perinuclear localization of mRNAs is regulated by cis-acting elements, particularly within 3' untranslated regions. The c-myc 3' UTR contains a localization signal that directs c-myc mRNA and heterologous reporter sequences to the perinuclear cytoplasm and cytoskeletal-bound polysomes. Similarly, the metallothionein-1 mRNA 3' UTR contains a cis-acting element that directs perinuclear localization. These elements are thought to interact with trans-acting factors that mediate transport and anchoring, although the full regulatory machinery remains to be fully defined. In addition, cellular stress such as hydroxyurea-induced oxidative stress can trigger ER expansion and perinuclear protein aggregation, indicating that the composition of the perinuclear region is responsive to environmental conditions.
perinuclear region of cytoplasm and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| BCL10 | NF-kappaB signaling dysregulation | Knockout or knock-in of BCL10 in immune cell lines |
| MT1 | Metal homeostasis and stress response | Point mutations in the 3' UTR to disrupt perinuclear localization |
| MYC | Oncogenesis and mRNA localization | CRISPR knock-in of tagged MYC to track mRNA localization |
| PLEC | Glomerular epithelial cell biology | Knockout of PLEC in podocyte models |
| Sperm perinuclear theca proteins | Fertilization and male fertility | Knockout mice or sperm cell models |
Perinuclear region and NF-kappaB signaling in disease
BCL10 accumulation at the perinuclear region is required for BCL10-mediated NF-kappaB activation. Dysregulated NF-kappaB signaling is implicated in various pathologies, and understanding how perinuclear localization contributes to this pathway may inform therapeutic strategies.
Perinuclear protein aggregation and stress-related disorders
Hydroxyurea-induced oxidative stress triggers ER expansion and cytoplasmic protein aggregation in the perinuclear region. This suggests that the perinuclear compartment is relevant to diseases characterized by oxidative stress and protein aggregation.
Perinuclear theca and reproductive disorders
The sperm perinuclear theca is essential for sperm functional competence and fertilization. Defects in its biogenesis could contribute to male infertility, making perinuclear theca proteins potential targets for reproductive research.
From perinuclear region of cytoplasm-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does a candidate gene localize to the perinuclear region? | Tagged knock-in with fluorescent protein |
| Is a specific 3' UTR element required for perinuclear mRNA localization? | Point mutation of the cis-acting element |
| What is the function of a perinuclear protein in signaling? | Knockout cell line |
| Can overexpression of a perinuclear protein induce aggregation? | Overexpression cell model |
| Which proteins are enriched in the perinuclear region? | Proteomics of subcellular fractions |
| Does a disease-associated mutation alter perinuclear localization? | Knock-in of the patient mutation |
How to Study the perinuclear region of cytoplasm Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Confocal microscopy | Subcellular localization of proteins/RNAs | Visualizing perinuclear distribution |
| Subcellular fractionation + RT-qPCR | Enrichment of specific mRNAs in perinuclear fraction | Validating RNA localization signals |
| Mass spectrometry proteomics | Protein composition of perinuclear fractions | Identifying perinuclear proteins |
| Fluorescence in situ hybridization (FISH) | Localization of specific mRNAs | Detecting perinuclear mRNA |
| Live-cell imaging | Dynamic movement of proteins/RNAs | Tracking perinuclear transport |
| Stress treatment + imaging | Aggregate formation | Studying perinuclear aggregation |
| Immunoelectron microscopy | Ultrastructural localization | Defining perinuclear structures |
| CRISPR-based tagging | Endogenous protein localization | Tagged knock-in for imaging |
Imaging-based localization studies
Fluorescence microscopy, including confocal and super-resolution imaging, is used to visualize the distribution of proteins and RNAs relative to the nucleus. For example, perinuclear distribution of plectin was characterized by immunolocalization, and BCL10 accumulation at the perinuclear region was demonstrated by imaging.
RNA localization assays
Subcellular fractionation followed by RT-PCR or RNA-seq can determine whether specific mRNAs are enriched in the perinuclear cytoplasm. The c-myc and metallothionein-1 mRNAs were shown to localize to the perinuclear cytoplasm using such approaches.
Proteomic profiling of the perinuclear region
Mass spectrometry-based proteomics of subcellular fractions can identify proteins enriched in the perinuclear region. This approach has revealed that the perinuclear region concentrates intrinsically disordered proteins with predicted phase-separation capacity.
Stress and aggregation assays
Treating cells with stressors such as hydroxyurea followed by imaging or biochemical assays can reveal perinuclear protein aggregation. This method was used to show that hydroxyurea induces ER expansion and perinuclear aggregation.
How CRISPR Can Be Used to Study GO:0048471 perinuclear region of cytoplasm
Knockout
CRISPR knockout can be used to eliminate candidate genes and test whether they are required for perinuclear localization of RNAs or proteins, or for perinuclear functions such as signaling. For example, knocking out BCL10 would test its role in perinuclear NF-kappaB activation.
Point Mutation
Point mutations can be introduced into cis-acting elements, such as the 3' UTR localization signals of c-myc or metallothionein-1, to dissect their role in perinuclear mRNA targeting. This allows precise structure-function analysis.
Knock-in
Knock-in of fluorescent or epitope tags enables visualization of endogenous proteins in the perinuclear region. This approach can be used to track proteins such as plectin or BCL10 in live cells.
Overexpression
Overexpression of perinuclear proteins can be used to test whether increased levels lead to aggregation or altered signaling. For instance, overexpressing proteins with phase-separation potential may mimic perinuclear condensation.
How EDITGENE Supports perinuclear region of cytoplasm Research
Researchers studying perinuclear region of cytoplasm-related genes often need to determine whether a candidate gene is causally involved in localization, signaling, or disease. EDITGENE provides a comprehensive suite of CRISPR-based services to enable such investigations, from knockout to precise point mutations and tagged knock-ins.
Contact EDITGENE today to design your custom CRISPR model for perinuclear region of cytoplasm research.
Frequently Asked Questions About perinuclear region of cytoplasm
What is the perinuclear region of cytoplasm?
The perinuclear region of cytoplasm (GO:0048471) is the cytoplasm situated near, or occurring around, the nucleus, as defined by QuickGO.
What genes are involved in the perinuclear region of cytoplasm?
Genes such as MYC, MT1, BCL10, and PLEC have been linked to this region through mRNA localization or protein distribution studies.
What is GO:0048471?
GO:0048471 is the Gene Ontology identifier for the cellular component term perinuclear region of cytoplasm.
Why is the perinuclear region important for mRNA localization?
It serves as a destination for specific mRNAs like c-myc and metallothionein-1, allowing localized translation near the nucleus.
How is the perinuclear region studied?
Common methods include fluorescence microscopy, subcellular fractionation, RNA localization assays, and proteomics.
Is the perinuclear region involved in disease?
Yes, it has been linked to NF-kappaB signaling, oxidative stress-induced aggregation, and sperm fertilization defects.
What proteins accumulate in the perinuclear region?
BCL10 accumulates there for NF-kappaB activation, and intrinsically disordered proteins with phase-separation potential concentrate in this region.
What is the sperm perinuclear theca?
It is a specialized perinuclear structure in sperm required for functional competence and fertilization.
Can CRISPR be used to study the perinuclear region?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression can be used to perturb genes and study their roles in perinuclear biology.
What is the relationship between the perinuclear region and stress?
Oxidative stress induced by hydroxyurea triggers ER expansion and perinuclear protein aggregation.
Conclusion
The perinuclear region of cytoplasm (GO:0048471) is a functionally specialized subcellular compartment that concentrates specific mRNAs, signaling proteins, and disordered proteins. It plays key roles in mRNA localization, localized translation, signal transduction, and stress responses, with implications for diseases ranging from cancer to infertility. Studying this region requires a combination of imaging, biochemical, and CRISPR-based approaches. EDITGENE provides the tools and services to enable such research.
References
- 1. do Amaral MJ et al.. 2022. The perinuclear region concentrates disordered proteins with predicted phase separation distributed in a 3D network of cytoskeletal filaments and organelles.. Biochim Biophys Acta Mol Cell Res 1869(1):119161 PMID: 34655689
- 2. Veyrune JL et al.. 1996. A localisation signal in the 3' untranslated region of c-myc mRNA targets c-myc mRNA and beta-globin reporter sequences to the perinuclear cytoplasm and cytoskeletal-bound polysomes.. J Cell Sci 109 ( Pt 6):1185-94 PMID: 8799809
- 3. Sánchez-Molina A et al.. 2025. Hydroxyurea induces an oxidative stress response that triggers ER expansion and cytoplasmic protein aggregation.. PLoS Biol 23(11):e3003493 PMID: 41259369
- 4. Nakamura K et al.. 2005. Accumulation of BCL10 at the perinuclear region is required for the BCL10-mediated nuclear factor-kappa B activation.. Pathobiology 72(4):191-202 PMID: 16127295
- 5. Chabanon H et al.. 2004. Characterization of the cis-acting element directing perinuclear localization of the metallothionein-1 mRNA.. Biochem Soc Trans 32(Pt 5):702-4 PMID: 15493992
- 6. Oko R et al.. 2009. Biogenesis of sperm perinuclear theca and its role in sperm functional competence and fertilization.. J Reprod Immunol 83(1-2):2-7 PMID: 19883945
- 7. Mahon P et al.. 1997. The 3' untranslated region plays a role in the targeting of metallothionein-I mRNA to the perinuclear cytoplasm and cytoskeletal-bound polysomes.. Biochim Biophys Acta 1358(2):153-62 PMID: 9332451
- 8. Yaoita E et al.. 1996. Perinuclear distribution of plectin characterizes visceral epithelial cells of rat glomeruli.. Am J Pathol 149(1):319-27 PMID: 8686756
