Details for: CL0000822

Cell ID: CL0000822

Cell Name: B-2 B cell

Description: B-2 B cells are reportedly CD48-positive, CD244-negative, and CD352-positive.

Synonyms: B-0 B cell, B-2 B lymphocyte, B-2 B-cell, B-2 B-lymphocyte, B2 B cell, B2 B lymphocyte, B2 B-cell, B2 B-lymphocyte, B2 cell

Selected Context(s): Overall

Gene Significance Landscape

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Score:
Display
Genes

Contexts:

Cell Significance Index (CSI) is uniquely calculated to reveal cell-specific gene markers. More info here

Significant Genes List

Genes with the highest and lowest Percentile Rank Scores (PRS) for B-2 B cell within the selected context(s).

Gene ID: A unique numerical identifier for this specific gene.
Symbol: Shortened abbreviation or name that represents this gene.
Ensembl Gene ID: A unique identifier assigned by Ensembl for genomic data mapping.
CSI Score: A combined effect size and statistical significance measure for B-2 B cell. Higher scores indicate a stronger, more significant difference in expression.
(Previously described as "Fold Change", but now represents Cliff's Delta × –log10(p).)

Gene ID: A unique numerical identifier for this specific gene.
Symbol: Shortened abbreviation or name that represents this gene.
Ensembl Gene ID: A unique identifier assigned by Ensembl for genomic data mapping.
CSI Score: A combined effect size and statistical significance measure for B-2 B cell. Higher scores indicate a stronger, more significant difference in expression.
Average CSI: csi sum / gene count
Cell network configuration

This network visualizes key genes for B-2 B cell. It primarily includes:
1. Top genes highly significant for this cell (Num. Top Cell Genes - based on the 'Min. CSI' setting).
2. Any additional specific 'Context Genes' you add below.
The final network is a combined view. Choose an Interaction Source (pathways or protein interactions) and optionally compare CSI scores with a Baseline Cell Type.

Maximum number of selected genes.
Select a context for the baseline cell.
Select a context for the target cell.
Target Cell for CSI:  B-2 B cell (CL0000822)

 Legend
Nodes (Genes):
 Query Gene
Node size also reflects Target Cell CSI magnitude.
Node Color (Target Cell CSI in specific network):
 Very High
 High
 Medium
 Low
 Very Low
 N/A or Not Sig.
Edges (Interactions):
 STRING (Protein-Protein)
 ONTOLOGY (Shared Pathway)
 Colors vary by pathway category; default arrow applies.

Loading network (please wait)...

## Summary The [B-2 B cell](/details-cell/CL0000822) is a conventional B lymphocyte central to the adaptive immune response. **Overall**, analysis of its gene significance profile reveals a striking and somewhat unexpected identity. While it is defined by its role in humoral immunity, its most specific gene markers, as determined by expression specificity (`csi_z`), are not classical immune-related genes. Instead, the profile is dominated by genes involved in fundamental cellular processes, including mitochondrial respiration, protein translation, and general transcription. This suggests that the unique characteristic of the [B-2 B cell](/details-cell/CL0000822) state, when compared to a broad landscape of other cell types, is its distinct metabolic and biosynthetic infrastructure, likely poised to support rapid activation and differentiation. ## Key Characteristics and Function The transcriptional identity of the [B-2 B cell](/details-cell/CL0000822) is underscored by a unique expression pattern of genes essential for high metabolic and biosynthetic output. These can be grouped into several key functional clusters. * **Mitochondrial Bioenergetics and Metabolism:** A significant number of the top markers are components of the mitochondrial electron transport chain and ATP synthesis machinery. This includes [COX2](/details-gene/4513) (Cytochrome c oxidase II), [COX7C](/details-gene/1350), [COX4I1](/details-gene/1327), [ND3](/details-gene/4537) (NADH-ubiquinone oxidoreductase chain 3), [UQCRB](/details-gene/7381) (Ubiquinol-cytochrome c reductase binding protein), [ATP5F1E](/details-gene/514), and [ATP5MG](/details-gene/10632). The high specificity of these genes suggests that [B-2 B cells](/details-cell/CL0000822) maintain a distinct and highly active state of aerobic respiration, likely to meet the energetic demands required for immune surveillance and rapid response to antigenic challenge. Further supporting this metabolic specialization is the specific expression of [TOMM7](/details-gene/54543), a component of the mitochondrial outer membrane protein import complex. * **Protein Synthesis and RNA Processing:** The cell exhibits a specific signature for genes involved in the translation and processing of messenger RNA. Top markers include the general transcription factor [BTF3](/details-gene/689), the poly(A)-binding protein [PABPC1](/details-gene/26986), and translation elongation factors [EEF1B2](/details-gene/1933) and [EEF1D](/details-gene/1936). Additionally, RNA-binding proteins such as [PCBP2](/details-gene/5094), [YBX1](/details-gene/4904), and [HNRNPA1](/details-gene/3178) are highly specific, indicating a unique regulatory network for mRNA stability, splicing, and translation. This machinery is consistent with a cell that must be prepared to synthesize large quantities of protein, such as antibodies, following activation. * **Cell Cycle and Growth Regulation:** The profile includes genes that regulate cell proliferation, such as the antiproliferative gene [BTG1](/details-gene/694), which is known to be maximally expressed in the G0/G1 phases of the cell cycle ([Link](https://doi.org/10.1002/j.1460-2075.1992.tb05213.x)). The high specificity of [TPT1](/details-gene/7178) (translationally controlled tumor protein) and [OAZ1](/details-gene/4946) (ornithine decarboxylase antizyme), which regulates polyamine biosynthesis, further points to a tightly controlled state of cellular growth and readiness. * **Immune Lineage Context:** Paradoxically, several canonical B-cell identity and function genes are found among the least specific markers (anti-markers). These include the B-cell lineage transcription factor [BCL11A](/details-gene/53335), the B-cell coactivator [POU2AF1](/details-gene/5450), the B-cell receptor component [CD79A](/details-gene/973), and the plasma cell differentiation factor [IRF4](/details-gene/3662). The low specificity of these genes does not imply their absence; rather, it suggests that their expression levels are not uniquely high in [B-2 B cells](/details-cell/CL0000822) when compared to all other cell types, which may include other B-cell subsets. This reinforces the conclusion that the distinguishing feature of a [B-2 B cell](/details-cell/CL0000822) in this **Overall** context is its metabolic and biosynthetic profile, rather than its fundamental lineage markers. ## Clinical Significance and Contextual Roles **Overall**, the gene significance profile of [B-2 B cells](/details-cell/CL0000822) highlights cellular processes with direct relevance to immunology and oncology. The high metabolic state, characterized by specific expression of mitochondrial genes, may represent a vulnerability in hematological malignancies. Cancers arising from the B-cell lineage, such as lymphomas and leukemias, require substantial energy for proliferation, and targeting mitochondrial metabolism is an emerging therapeutic strategy. The specific expression of the antiproliferative gene [BTG1](/details-gene/694), which has been identified as a translocation partner in B-cell chronic lymphocytic leukemia ([Link](https://doi.org/10.1002/j.1460-2075.1992.tb05213.x)), underscores the clinical relevance of the cell's growth control machinery. Deregulation of this gene or its pathways could contribute to malignant transformation. Furthermore, the specific suite of RNA-binding proteins and translation factors, including [PABPC1](/details-gene/26986) and [YBX1](/details-gene/4904), suggests a layer of post-transcriptional regulation that could be critical for normal B-cell function and differentiation. Dysregulation of these processes can impact the expression of key oncogenes or tumor suppressors, potentially contributing to lymphomagenesis. The low specificity of key immune signaling molecules like [TNF](/details-gene/7124) and innate sensors like [CGAS](/details-gene/115004) suggests that while B-2 B cells participate in inflammatory responses, these programs are not their most unique feature compared to other immune cells. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The highly specific expression of mitochondrial bioenergetics and protein synthesis machinery in [B-2 B cells](/details-cell/CL0000822) reflects a unique metabolic "poised" state. This state may be essential for maintaining long-term viability and enabling the rapid, energetically demanding processes of clonal expansion and high-volume antibody production upon antigen encounter, distinguishing them metabolically from other resting lymphocytes. * **Surprising Findings:** The most specific markers for a key adaptive immune cell are not immune receptors or signaling molecules, but rather components of core metabolic pathways. Concurrently, canonical B-cell identity genes like [CD79A](/details-gene/973) and [POU2AF1](/details-gene/5450) exhibit low specificity, suggesting that while they define the cell's lineage, they do not define its unique transcriptional state in a broad cellular comparison. * **Testable Questions:** How does the metabolic flux (e.g., oxygen consumption rate, extracellular acidification rate) of quiescent [B-2 B cells](/details-cell/CL0000822) compare to that of other lymphocyte populations like T cells or NK cells? Furthermore, would pharmacologic inhibition of key mitochondrial complexes, marked by genes like [COX2](/details-gene/4513) or [UQCRB](/details-gene/7381), disproportionately impair the activation and differentiation of [B-2 B cells](/details-cell/CL0000822) into plasma cells? 2. **Hypothesis:** The specificity of general transcription and RNA-binding proteins, such as [BTF3](/details-gene/689) and [PABPC1](/details-gene/26986), indicates the existence of a distinct, B-2 B cell-specific network of transcriptional and post-transcriptional control. This network may govern the expression of a broad set of housekeeping genes, thereby establishing the unique metabolic and biosynthetic phenotype of the cell. * **Surprising Findings:** A general transcription factor, [BTF3](/details-gene/689), which associates with RNA polymerase II, is the top specificity marker. Such factors are typically considered ubiquitously expressed, so its high `csi_z` score suggests its expression is maintained at a uniquely high or stable level in [B-2 B cells](/details-cell/CL0000822) relative to other cell types. * **Testable Questions:** Does depletion of [BTF3](/details-gene/689) or [PABPC1](/details-gene/26986) in [B-2 B cells](/details-cell/CL0000822) lead to a global disruption of the cell's characteristic metabolic gene signature? Moreover, what are the specific genomic binding sites for [BTF3](/details-gene/689) (via ChIP-seq) and the mRNA interactome of [PABPC1](/details-gene/26986) (via CLIP-seq) in [B-2 B cells](/details-cell/CL0000822), and do these targets predominantly include genes involved in energy metabolism and protein synthesis?