Details for: RPS15AP17

Gene ID: 391656

Gene Type:  Pseudogene  - A non-functional segment of DNA that resembles a functional gene but has lost its protein-coding ability or is otherwise no longer expressed.

Symbol: RPS15AP17

Ensembl ID: ENSG00000225405

Description: ribosomal protein S15a pseudogene 17

Selected Context(s):  Overall

Cell Significance Landscape

Contexts:

Significant Cells

Cell Significance Index (CSI) scores for the chosen context(s)

  • CD4-positive, alpha-beta thymocyte CL0000810
    CSI 8.55
    rCSI 6.85%
    PRS 99.5

Cell ID: Standard Cell Ontology term used for mapping and comparing cells across experiments. Ensures consistency in analyzing cellular functions across tissues.
Fold Change: Represents the ratio of the current Cell Significance Index to the Cell Significance Index Threshold, indicating how much the gene expression has changed compared to a baseline.
Cell Significance Index: Reflects how strongly a gene is expressed in this specific cell.

Cell ID: Standard Cell Ontology term used for mapping and comparing cells across experiments. Ensures consistency in analyzing cellular functions across tissues.
Fold Change: Represents the ratio of the current Cell Significance Index to the Cell Significance Index Threshold, indicating how much the gene expression has changed compared to a baseline.
Cell Significance Index: Reflects how strongly a gene is expressed in this cell type. Calculated using techniques like effect size estimation and bootstrapping for reliability.

Cell ID: Standard Cell Ontology term used for mapping and comparing cells across experiments. Ensures consistency in analyzing cellular functions across tissues.
Fold Change: Represents the ratio of the current Cell Significance Index to the Cell Significance Index Threshold, indicating how much the gene expression has changed compared to a baseline.
Cell Significance Index: Reflects how strongly a gene is expressed in this cell type. Calculated using techniques like effect size estimation and bootstrapping for reliability.
Network Configuration

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  • Node Size: Proportional to Target Cell CSI magnitude
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Other Information

This section provides additional information about the gene, including a description generated by an AI language model and details about associated proteins.

## Summary [RPS15AP17](/details-gene/391656) is a processed pseudogene located on chromosome 4q13.1. It is homologous to the gene encoding ribosomal protein S15a. While pseudogenes have historically been considered non-functional, emerging evidence suggests they can have regulatory roles. Expression data indicates that [RPS15AP17](/details-gene/391656) has a highly specific significance in [CD4-positive, alpha-beta thymocyte](/details-cell/CL0000810), suggesting a potential, specialized function within the context of T-cell development. ## Cellular Roles and Expression Landscape The expression profile of [RPS15AP17](/details-gene/391656) is exceptionally specific. **Overall**, the gene shows its most significant expression (CSI: 8.55) exclusively in [CD4-positive, alpha-beta thymocyte](/details-cell/CL0000810). These cells are a critical intermediate stage in the thymus during the maturation of T lymphocytes. The high degree of cell-type specificity suggests that [RPS15AP17](/details-gene/391656) is not a broadly expressed housekeeping gene, but rather may be involved in a process unique to this stage of thymocyte development, such as T-cell receptor repertoire selection or lineage commitment. The lack of significant expression in other cell types underscores its potential role as a highly specific marker for this particular immune cell precursor. ## Pathways and Molecular Function As a pseudogene, [RPS15AP17](/details-gene/391656) is not predicted to be translated into a functional protein. Its molecular function, if any, is likely to be regulatory and operate at the RNA level. Given its homology to a ribosomal protein gene, it could potentially be involved in regulating ribosome biogenesis or protein translation by acting as a competing endogenous RNA (ceRNA), sequestering microRNAs or other regulatory factors that would otherwise target the parent gene, RPS15A. However, its specific involvement in known biological pathways has not been characterized, and its function remains largely inferred from its expression context within developing T-cells. ## Research Directions The highly restricted expression of [RPS15AP17](/details-gene/391656) in [CD4-positive, alpha-beta thymocyte](/details-cell/CL0000810) prompts several intriguing questions about its role in T-cell biology and its potential relevance to disease. ### Testable Hypotheses 1. **Regulatory Role in T-cell Development:** [RPS15AP17](/details-gene/391656) functions as a ceRNA, titrating microRNAs that target its parent gene, RPS15A. This regulation could be crucial for modulating protein synthesis rates during the metabolically demanding process of thymocyte positive selection. 2. **Involvement in T-cell Malignancies:** Dysregulation of [RPS15AP17](/details-gene/391656) expression could contribute to the pathogenesis of T-cell acute lymphoblastic leukemia (T-ALL), a cancer originating from transformed thymocytes, by disrupting normal developmental checkpoints. ### Proposed Experiments To test the hypothesis that [RPS15AP17](/details-gene/391656) acts as a ceRNA, one could perform a targeted knockdown of [RPS15AP17](/details-gene/391656) using antisense oligonucleotides or CRISPR interference (CRISPRi) in a relevant human T-cell precursor line. The functional consequences would be assessed by measuring changes in RPS15A mRNA and protein levels via qPCR and western blot, respectively. Furthermore, RNA-immunoprecipitation (RIP) followed by sequencing could identify specific microRNAs that bind to the [RPS15AP17](/details-gene/391656) transcript, directly testing its ability to sequester these regulatory molecules. ### Therapeutic Potential Given its pseudogene nature and extremely narrow expression profile, [RPS15AP17](/details-gene/391656) presents a unique therapeutic opportunity. If its expression is found to be aberrantly high in T-ALL and contributes to the disease state, it could be an excellent target for RNA-based therapies, such as antisense oligonucleotides. The specificity for thymocytes would theoretically minimize off-target effects on other healthy tissues. Such a strategy would focus on inhibition of its function. Conversely, if its loss is implicated in disease, restoring its expression could be a therapeutic goal, though this is technically more challenging.