Details for: CL0000817

Cell ID: CL0000817

Cell Name: precursor B cell

Description: A precursor B cell is a B cell with the phenotype CD10-positive.

Synonyms: pre-B cell

Selected Context(s): Overall

Gene Significance Landscape

Display Options
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 precursor 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 precursor 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 precursor 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 precursor 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:  precursor B cell (CL0000817)

 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 [precursor B cell](/details-cell/CL0000817), an early-stage lymphocyte defined by CD10 expression, is characterized by an exceptionally high level of biosynthetic and metabolic activity. The gene significance profile is dominated by genes essential for protein synthesis, RNA processing, and energy production, suggesting a cell state geared towards rapid growth and proliferation. While key B-lymphoid identity markers such as [CD79B](/details-gene/974) and the surrogate light chain component [IGLL1](/details-gene/3543) are significantly expressed, confirming its lineage, the most defining characteristic based on expression specificity is a broad and robust activation of fundamental cellular machinery. The top marker, [B2M](/details-gene/567), underscores the cell's preparedness for antigen presentation via MHC class I, a foundational function of the B cell lineage. ## Key Characteristics and Function **Overall**, the gene expression landscape of the [precursor B cell](/details-cell/CL0000817) points to a cell focused on executing a demanding developmental program requiring massive investment in cellular infrastructure. * **B-Cell Lineage Identity and Receptor Assembly:** The identity of this cell as a B lymphocyte intermediate is firmly established by the significant expression of [CD79B](/details-gene/974), a core component of the B-cell receptor (BCR) signaling complex, and [IGLL1](/details-gene/3543), which forms the surrogate light chain of the pre-BCR. The expression of [B2M](/details-gene/567) as the top marker (rCSI 95.1%) highlights the cell's capacity for MHC class I antigen presentation, a role it shares with mature B cells. * **Intense Biosynthetic Activity:** A prominent functional signature is the high significance of genes involved in RNA and protein production. * **RNA Processing and Stability:** Genes encoding heterogeneous nuclear ribonucleoproteins like [HNRNPA2B1](/details-gene/3181) and [HNRNPA1](/details-gene/3178), along with the poly(A)-binding protein [PABPC1](/details-gene/26986), are highly significant. This suggests extensive post-transcriptional regulation, including mRNA splicing and stabilization, is critical for this developmental stage. * **Protein Translation:** The high significance of translationally controlled tumor protein ([TPT1](/details-gene/7178)) and elongation factors ([EEF1D](/details-gene/1936), [EEF1B2](/details-gene/1933)) indicates a high rate of protein synthesis, necessary to produce components for cell growth, division, and the pre-BCR complex. * **High Energy Metabolism:** The cell's high metabolic demand is underscored by the strong significance of multiple nuclear-encoded mitochondrial genes. These include components of the ATP synthase complex ([ATP5MG](/details-gene/10632), [ATP5MC2](/details-gene/517), [ATP5F1E](/details-gene/514)), cytochrome c oxidase ([COX4I1](/details-gene/1327)), and the ADP/ATP translocase ([SLC25A6](/details-gene/293)). This metabolic profile is consistent with the energetic requirements of a rapidly proliferating cell. * **Nuclear and Chromatin Organization:** The profile includes significant markers related to chromatin structure and nuclear processes, such as the replacement histone variants [H3 3A](/details-gene/3020) and [H3 3B](/details-gene/3021), the nucleolar protein [NPM1](/details-gene/4869), and the chromatin-binding protein [HMGB1](/details-gene/3146). This is characteristic of a cell undergoing active transcription and preparing for cell division. * **Negative Markers and Metabolic Specialization:** The anti-marker profile provides critical insights into the cell's specialized state. Notably, several genes encoded by the mitochondrial genome, including NADH dehydrogenase subunits ([ND1](/details-gene/4535), [ND2](/details-gene/4536), [ND4](/details-gene/4538)) and cytochrome c oxidase subunit III ([COX3](/details-gene/4514)), are among the most negatively significant genes. This striking dichotomy between the high expression of nuclear-encoded and low expression of mitochondrial-encoded respiratory chain components suggests a specific and tightly regulated metabolic state, possibly favoring aerobic glycolysis (Warburg effect) over oxidative phosphorylation, a feature common in developing and cancerous cells. ## Clinical Significance and Contextual Roles The gene signature of the [precursor B cell](/details-cell/CL0000817) holds significant clinical relevance, particularly in the context of hematological malignancies. Precursor B-cell acute lymphoblastic leukemia (B-ALL) originates from the malignant transformation of this cell type. The genes identified as highly significant in this **Overall** context are likely fundamental to the survival and proliferation of these leukemic cells. For instance, [NPM1](/details-gene/4869) and [HMGB1](/details-gene/3146) are frequently overexpressed in various cancers and are associated with proliferation and cell growth ([Link](https://doi.org/10.1021/bi00429a017), [Link](https://pubmed.ncbi.nlm.nih.gov/9036861/)). The translationally controlled tumor protein, [TPT1](/details-gene/7178), is also widely associated with cell growth and tumorigenesis. The metabolic profile, particularly the potential reliance on glycolysis suggested by the anti-marker signature, is a known hallmark of cancer that is actively explored for therapeutic targeting. Therefore, the genes defining the highly proliferative and biosynthetic state of normal [precursor B cells](/details-cell/CL0000817) represent a molecular toolkit that can be co-opted during malignant transformation, making them potential targets for anti-leukemia therapies. ## Potential Mechanisms and Research Directions 1. **Hypothesis: [Precursor B cells](/details-cell/CL0000817) exhibit uncoupled expression of nuclear and mitochondrial-encoded respiratory genes to enforce a glycolytic state.** * **Surprising Findings:** It is highly unexpected to observe a strong positive significance for numerous nuclear-encoded components of the mitochondrial electron transport chain and ATP synthase (e.g., [COX4I1](/details-gene/1327), [ATP5MG](/details-gene/10632)) co-occurring with a strong negative significance for core subunits encoded by the mitochondrial genome itself (e.g., [ND1](/details-gene/4535), [ND2](/details-gene/4536), [COX3](/details-gene/4514)). This suggests a deliberate metabolic reprogramming rather than a simple shutdown of mitochondrial activity. * **Testable Questions:** What is the functional status of the electron transport chain in [precursor B cells](/details-cell/CL0000817)? Does this transcriptional imbalance lead to the assembly of incomplete respiratory complexes, thereby promoting a state of aerobic glycolysis essential for providing biosynthetic precursors for proliferation? 2. **Hypothesis: The defining characteristic of the [precursor B cell](/details-cell/CL0000817) stage is the quantitative dominance of its biosynthetic machinery over lineage-specific gene expression.** * **Surprising Findings:** While B-lineage markers like [CD79B](/details-gene/974) and [IGLL1](/details-gene/3543) are significantly expressed, their specificity scores are notably lower than those of ubiquitous "housekeeping" genes involved in fundamental processes like translation ([TPT1](/details-gene/7178)), RNA binding ([PABPC1](/details-gene/26986)), and MHC I presentation ([B2M](/details-gene/567)). This suggests that the cell's identity at this transient stage is overwhelmingly defined by its functional state of high-level biosynthesis. * **Testable Questions:** How does the targeted inhibition of key RNA processing proteins, such as [HNRNPA1](/details-gene/3178) or [PABPC1](/details-gene/26986), impact the progression of B-cell development? Would this inhibition cause a global collapse of the biosynthetic program or specifically impair the expression and assembly of the pre-BCR, thus revealing a hierarchical dependence?