Details for: CHKB CPT1B

Gene ID: 386593

Gene Type:  ncRNA (Non-coding RNA)  - A functional RNA molecule that is transcribed from DNA but not translated into a protein. Includes classes like miRNA and lncRNA.

Symbol: CHKB CPT1B

Ensembl ID: ENSG00000254413

Description: CHKB-CPT1B readthrough (NMD candidate)

Cell Significance Landscape

Significant Cells

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

  • basal cell of epidermis CL0002187
    CSI 2.42
    rCSI 4.3%
    PRS 94.19
  • suprabasal keratinocyte CL4033013
    CSI 1.43
    rCSI 2.33%
    PRS 95.67

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

Explore relationships of the current gene. Select an Interaction Source: 'ONTOLOGY' for shared pathways (GO/Reactome) or 'STRING' for protein-protein interactions. Further refine by selecting context genes and comparing Cell Significance Index (CSI) scores between baseline and target cell types and their specific contexts.

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Legend:
  • Query Gene
  • Node Color (Target Cell CSI, relative to current network):
    • Very High
    • High
    • Medium
    • Low
    • Very Low
    • CSI N/A
  • Node Size: Proportional to Target Cell CSI magnitude
  • STRING PPI Edge
  • Shared Pathway Edge (ONTOLOGY)

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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 [CHKB CPT1B](/details-gene/386593) is a non-coding RNA (ncRNA) located on chromosome 22q13.33. It is generated from a transcriptional readthrough event involving the adjacent *CHKB* and *CPT1B* genes and is considered a candidate for nonsense-mediated decay (NMD). Expression data from the **Overall** context indicates a highly specialized role for this transcript within the skin. It shows significant expression specifically in the [basal cell of epidermis](/details-cell/CL0002187) and [suprabasal keratinocyte](/details-cell/CL4033013), suggesting its involvement in the maintenance and differentiation programs of the human epidermis. ## Cellular Roles and Expression Landscape The expression profile of [CHKB CPT1B](/details-gene/386593) points to a distinct and specific function in epidermal biology. **Overall**, its most significant expression is observed in the two key cell populations responsible for skin barrier formation: * **[basal cell of epidermis](/details-cell/CL0002187):** The highest significance is found in these progenitor cells of the epidermis (CSI: 2.42), which are responsible for the constant renewal of the skin. * **[suprabasal keratinocyte](/details-cell/CL4033013):** High significance is also noted in these cells (CSI: 1.43), which represent the differentiating progeny of basal cells that progressively move towards the skin surface. This restricted expression pattern strongly suggests that [CHKB CPT1B](/details-gene/386593) is not a broadly expressed housekeeping gene but rather plays a specialized role tightly linked to the processes of keratinocyte proliferation and differentiation. The available data exclusively highlights its presence in the epidermis, underscoring its potential importance in skin homeostasis. ## Pathways and Molecular Function Direct functional annotations for the [CHKB CPT1B](/details-gene/386593) readthrough transcript are not provided. However, the functions of its parent genes may offer valuable context. The *CHKB* (Choline Kinase Beta) gene is essential for the *de novo* biosynthesis of phosphatidylcholine, a major component of cellular membranes. The *CPT1B* (Carnitine Palmitoyltransferase 1B) gene encodes a key mitochondrial enzyme that facilitates the transport of long-chain fatty acids for beta-oxidation, a critical process for energy production. The specific expression of this ncRNA in metabolically active and proliferating/differentiating keratinocytes suggests a potential, though uncharacterized, role. It may function as a *cis*-regulatory element to coordinate the expression of its parent genes, thereby linking the demand for membrane biogenesis (*CHKB*) with the energy supply required for the process (*CPT1B*) during the formation of the epidermal layers. ## Research Directions The highly specific expression of the [CHKB CPT1B](/details-gene/386593) ncRNA in the epidermis makes it a compelling subject for further investigation, particularly in the context of skin health and disease. ### Testable Hypotheses 1. The [CHKB CPT1B](/details-gene/386593) ncRNA acts as a local regulatory transcript that coordinates the expression of metabolic genes (*CHKB* and *CPT1B*) required for the high energetic and biosynthetic demands of keratinocyte differentiation and stratification. 2. Dysregulation of [CHKB CPT1B](/details-gene/386593) expression is a feature of skin barrier disorders, such as psoriasis or atopic dermatitis, where its altered levels contribute to defects in epidermal differentiation or lipid metabolism. ### Suggested Experimental Approach To test the hypothesis that [CHKB CPT1B](/details-gene/386593) is integral to keratinocyte differentiation, a loss-of-function study could be performed. Primary human keratinocytes could be cultured in vitro and treated with specifically designed antisense oligonucleotides (ASOs) to induce knockdown of the [CHKB CPT1B](/details-gene/386593) transcript. The effect on differentiation could be assessed by inducing differentiation with high calcium levels and monitoring the expression of key markers like Keratin 1, Keratin 10, and Loricrin via qRT-PCR and immunofluorescence. Furthermore, RNA-sequencing could elucidate the downstream consequences of its knockdown, particularly on the expression of its parent genes and other lipid and energy metabolism pathways. ### Therapeutic Potential Given its remarkable specificity to epidermal cells, [CHKB CPT1B](/details-gene/386593) presents an attractive potential target for topical therapies. As an ncRNA, it is amenable to targeting with nucleic acid-based drugs like ASOs or siRNAs. If its dysregulation is causally linked to hyperproliferative skin diseases like psoriasis, therapeutic **inhibition** could help normalize keratinocyte function. Conversely, if its reduced expression contributes to the impaired barrier function seen in atopic dermatitis, strategies aimed at stabilizing or increasing its levels could offer therapeutic benefit. Its specificity suggests that such an approach would have a low risk of off-target effects in other tissues.