Details for: IGKV3D 11

Gene ID: 28876

Gene Type:  Other  - A known gene or region type that lacks a specific category. Includes immunoglobulin (Ig), T-cell receptor (TCR) gene segments, and repetitive elements.

Symbol: IGKV3D 11

Ensembl ID: ENSG00000211632

Description: immunoglobulin kappa variable 3D-11

Selected Context(s):  Overall

Cell Significance Landscape

Contexts:

Associated with

Significant Cells

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

  • plasmablast CL0000980
    CSI 11.5
    rCSI 9.05%
    PRS 99.82
  • IgG plasma cell CL0000985
    CSI 5.64
    rCSI 6.75%
    PRS 99.89
  • IgA plasma cell CL0000987
    CSI 5.11
    rCSI 5.23%
    PRS 99.47

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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  • Node Color (Target Cell CSI, relative to current network):
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    • High
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    • 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 Immunoglobulin Kappa Variable 3D-11, encoded by the [IGKV3D 11](/details-gene/28876) gene, is a V (variable) segment of the immunoglobulin kappa light chain. As a crucial component of the adaptive immune system, it contributes to the diversity of the antibody repertoire. Its expression is highly specific to the B-cell lineage, with **Overall** data indicating it is a defining marker of terminally differentiated, antibody-secreting cells. The gene's primary function is to form part of the antigen-binding site of immunoglobulins, thereby playing a direct role in recognizing and neutralizing pathogens. ## Cellular Roles and Expression Landscape The expression profile of [IGKV3D 11](/details-gene/28876) firmly establishes its role in the humoral immune response. **Overall**, the gene shows the highest significance in cells responsible for antibody production. It is a top marker for [plasmablasts](/details-cell/CL0000980) (CSI: 11.50), which are rapidly proliferating, antibody-secreting cells. Furthermore, it is highly significant in mature, class-switched plasma cells, including [IgG plasma cells](/details-cell/CL0000985) (CSI: 5.64) and [IgA plasma cells](/details-cell/CL0000987) (CSI: 5.11). This highly restricted expression pattern suggests that [IGKV3D 11](/details-gene/28876) is primarily utilized during the final stages of B-cell maturation following antigen encounter. Its low or absent expression in other cell lineages underscores its specialized function within the immune system, specifically in generating the diversity required for effective antigen recognition by B-cells and antibodies. ## Pathways and Molecular Function The function of [IGKV3D 11](/details-gene/28876) is directly linked to the formation of functional immunoglobulins. Gene Ontology annotations place it within the [Adaptive immune response](/details-ontology/GO:0002250) and the broader [Immune response](/details-ontology/GO:0006955) processes. Its molecular role is realized through its incorporation into the [Immunoglobulin complex](/details-ontology/GO:0019814), which can be found anchored to the [Plasma membrane](/details-ontology/GO:0005886) as part of the B-cell receptor (BCR) or secreted as soluble antibodies. The high expression in [plasmablasts](/details-cell/CL0000980) and plasma cells is perfectly aligned with these annotations, as these cells are dedicated to the massive production and secretion of immunoglobulin complexes to mediate humoral immunity. ## Research Directions Given the specialized role of [IGKV3D 11](/details-gene/28876) in antibody production, future research could focus on its involvement in pathologies characterized by dysregulated humoral immunity. ### Proposed Hypotheses: 1. **Role in Autoimmunity:** Preferential usage or specific somatic hypermutations of the [IGKV3D 11](/details-gene/28876) segment may contribute to the generation of high-affinity, pathogenic autoantibodies in diseases like systemic lupus erythematosus or Sjögren's syndrome, where B-cell hyperactivity is a known driver of pathology. 2. **Biomarker in B-Cell Malignancies:** Clonal B-cell populations in malignancies such as multiple myeloma or chronic lymphocytic leukemia might exhibit biased usage of the [IGKV3D 11](/details-gene/28876) gene. Its prevalence within the malignant clone could serve as a prognostic biomarker or a minimal residual disease (MRD) marker. ### Experimental Approach: To test the hypothesis that [IGKV3D 11](/details-gene/28876) is a potential biomarker in multiple myeloma, a compelling experiment would be to perform single-cell V(D)J and RNA sequencing on bone marrow aspirates from a large cohort of newly diagnosed patients. This would allow for the precise quantification of [IGKV3D 11](/details-gene/28876) usage within the malignant [IgG plasma cell](/details-cell/CL0000985) clones and correlation of its usage frequency with clinical outcomes, such as depth of response to therapy and overall survival. ### Therapeutic Potential: As a component of the antibody variable region, [IGKV3D 11](/details-gene/28876) is not a conventional drug target. However, if a B-cell malignancy consistently expresses a specific antibody idiotype derived from the [IGKV3D 11](/details-gene/28876) segment, it presents a highly specific target for tailored immunotherapies. This could include the development of anti-idiotype monoclonal antibodies or CAR-T cells engineered to recognize the unique antigen-binding site of the malignant B-cell receptor. Such a strategy would represent a highly personalized therapeutic intervention designed to eliminate the cancerous clone while sparing healthy B-cells.