Details for: CL0000791

Cell ID: CL0000791

Cell Name: mature alpha-beta T cell

Description: A alpha-beta T cell that has a mature phenotype.

Synonyms: mature alpha-beta T lymphocyte, mature alpha-beta T-cell, mature alpha-beta T-lymphocyte

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 mature alpha-beta T 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 mature alpha-beta T 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 mature alpha-beta T 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 mature alpha-beta T 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:  mature alpha-beta T cell (CL0000791)

 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 A [mature alpha-beta T cell](/details-cell/CL0000791) is a differentiated lymphocyte of the adaptive immune system, characterized by the expression of a T-cell receptor (TCR) composed of alpha and beta chains. The gene significance profile suggests that **Overall**, this cell type is defined by a state of high metabolic and translational readiness. The top specificity marker, [B2M](/details-gene/567), underscores its fundamental role in MHC class I-mediated antigen recognition and T-cell cytotoxicity. This is complemented by a distinct signature of highly expressed mitochondrial and ribosomal protein genes, indicating that these cells are metabolically poised and equipped for rapid protein synthesis, which is essential for executing effector functions upon activation. ## Key Characteristics and Function Analysis of top marker genes, ranked by expression specificity (`csi_z`), reveals several core functional clusters that define the [mature alpha-beta T cell](/details-cell/CL0000791). * **Immune Recognition and Regulation:** The paramount significance of [B2M](/details-gene/567) (CSI: 28.73) highlights the cell's central role in the immune system. As an integral component of MHC class I molecules, it is essential for antigen presentation pathways that govern T-cell development, survival, and cytotoxic function ([Link](https://pubmed.ncbi.nlm.nih.gov/3312414/)). The presence of [HLA E](/details-gene/3133) as another significant marker points towards regulatory interactions, potentially with NK cells or other T-cell subsets, further refining its role in immune surveillance ([Link](https://pubmed.ncbi.nlm.nih.gov/3260916/)). * **High Metabolic Poise:** A prominent feature of this cell type is the unique expression of numerous genes involved in mitochondrial respiration. This includes multiple subunits of ATP synthase ([ATP5MG](/details-gene/10632), [ATP5F1E](/details-gene/514)) and cytochrome c oxidase ([COX4I1](/details-gene/1327), [COX7C](/details-gene/1350), [COX1](/details-gene/4512)). The high specificity of these core metabolic genes suggests that [mature alpha-beta T cell](/details-cell/CL0000791)s maintain a distinct and highly active state of oxidative phosphorylation. This metabolic posture is likely critical to meet the high energetic demands required for immune surveillance and rapid transition from a quiescent to a highly proliferative and effector state upon antigen encounter. * **Translational and Transcriptional Readiness:** The cell is characterized by high-level expression of genes integral to protein synthesis and RNA processing. This includes translation elongation factor [EEF1B2](/details-gene/1933), the ribosomal biogenesis factor [NPM1](/details-gene/4869), and various RNA-binding proteins such as [PABPC1](/details-gene/26986) and [HNRNPA2B1](/details-gene/3181). This robust translational machinery suggests that the cell is primed to rapidly synthesize large quantities of proteins, such as cytokines and cytotoxic molecules, immediately following activation. The high significance of the transcription factor [BTF3](/details-gene/689) and the anti-proliferative co-regulator [BTG1](/details-gene/694) may indicate that while the machinery is ready, its use is under tight transcriptional control to maintain a state of quiescence until activation. * **Defining Boundaries:** The list of anti-markers helps to circumscribe the identity of this cell population. The low significance of the Th2-lineage-defining transcription factor [GATA3](/details-gene/2625) and markers more commonly associated with NK cells or specific T-cell subsets like [KLRB1](/details-gene/3820) and [CD96](/details-gene/10225) confirms that this gene signature represents a general, unpolarized [mature alpha-beta T cell](/details-cell/CL0000791) population, rather than a specific effector subset. ## Clinical Significance and Contextual Roles The gene signature of the [mature alpha-beta T cell](/details-cell/CL0000791) has significant clinical implications, particularly in oncology and immunology. The prominence of [B2M](/details-gene/567) is clinically crucial. Loss-of-function mutations in [B2M](/details-gene/567) are a well-documented mechanism of tumor immune evasion, as the resulting loss of MHC class I surface expression prevents tumor cells from being recognized and eliminated by cytotoxic T lymphocytes. Therefore, the high expression of [B2M](/details-gene/567) is fundamental to the cell's anti-tumor activity. The distinct metabolic profile, marked by high expression of oxidative phosphorylation components, is relevant to T-cell function in chronic diseases and the tumor microenvironment. T-cell exhaustion, a state of dysfunction occurring during chronic antigen stimulation, is often associated with metabolic collapse. The specific mitochondrial markers identified here, such as [COX4I1](/details-gene/1327) and [ATP5F1E](/details-gene/514), could serve as potential biomarkers for T-cell metabolic fitness and targets for metabolic reprogramming strategies aimed at restoring T-cell function. Furthermore, the high expression of genes like [NPM1](/details-gene/4869), a nucleolar phosphoprotein, is of interest. While mutations in [NPM1](/details-gene/4869) are a hallmark of acute myeloid leukemia, its role as a defining marker in healthy T cells suggests it performs a critical physiological function in maintaining ribosomal capacity and cellular homeostasis, which may be distinct from its pathological role in myeloid transformation ([Link](https://pubmed.ncbi.nlm.nih.gov/2713355/)). ## Potential Mechanisms and Research Directions 1. The unique metabolic signature of mature T cells suggests a pre-configured state for rapid activation. * **Hypothesis:** The specific suite of highly expressed mitochondrial genes (e.g., [COX4I1](/details-gene/1327), [ATP5F1E](/details-gene/514)) in [mature alpha-beta T cell](/details-cell/CL0000791)s does not merely support basal energy needs but constitutes a pre-assembled "metabolic engine" optimized for a rapid switch from quiescence to effector function. The specific composition of this engine may be a key determinant of the cell's subsequent functional fate (e.g., cytotoxicity vs. helper function) upon activation. * **Surprising Findings:** It is notable that fundamental metabolic genes, often considered ubiquitous housekeeping components, emerge as top *specificity* markers. This implies that the expression level and perhaps the specific subunit composition of the respiratory chain are uniquely regulated in T cells compared to other cell types, representing a specialized adaptation rather than a general cellular feature. * **Testable Questions:** How does the targeted knockdown of T-cell-specific mitochondrial protein isoforms, such as [ATP5F1E](/details-gene/514), affect the kinetics and magnitude of cytokine production and proliferation following T-cell receptor (TCR) stimulation compared to the knockdown of more ubiquitously expressed isoforms? 2. The co-expression of extensive translational machinery and potent anti-proliferative regulators suggests a "poised but restrained" state. * **Hypothesis:** The high expression of translational machinery ([TPT1](/details-gene/7178), [PABPC1](/details-gene/26986)) alongside the anti-proliferative transcription co-regulator [BTG1](/details-gene/694) indicates a mechanism of post-transcriptional control. In this model, quiescent T cells transcribe and maintain a pool of key effector mRNAs that are held in a translationally repressed state, with [BTG1](/details-gene/694) contributing to the maintenance of this quiescent state. TCR signaling would then relieve this inhibition, allowing for immediate translation and a more rapid response than transcription alone would permit. * **Surprising Findings:** The paradox of a cell being simultaneously enriched for potent protein synthesis machinery and anti-proliferative factors is striking. This suggests an elegant biological "brake-and-accelerator" system where the cell is constantly ready for rapid action but is actively and powerfully restrained to prevent inappropriate activation. * **Testable Questions:** Does a CLIP-Seq (Cross-Linking Immunoprecipitation followed by Sequencing) analysis for [BTG1](/details-gene/694) or associated protein complexes in resting T cells reveal binding to the 3' UTRs of translationally silent cytokine or effector molecule mRNAs? Does knockdown of [BTG1](/details-gene/694) lead to a lower threshold for T-cell activation or leaky expression of effector proteins?