Details for: CL0005010

Cell ID: CL0005010

Cell Name: renal intercalated cell

Description: A cuboidal epithelial cell of the kidney that regulates acid/base balance.

Synonyms: intercalated 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 renal intercalated 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 renal intercalated 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 renal intercalated 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 renal intercalated 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:  renal intercalated cell (CL0005010)

 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 [renal intercalated cell](/details-cell/CL0005010) is a cuboidal epithelial cell within the kidney collecting duct, primarily responsible for regulating systemic acid-base balance. The gene significance profile, based on expression specificity (**Overall** context), strongly indicates that this function is powered by an exceptionally high level of mitochondrial bioenergetic activity. The cell's identity is overwhelmingly defined by genes encoding components of the electron transport chain and ATP synthesis machinery, suggesting a cellular physiology that is highly specialized for massive and sustained energy production to fuel active ion transport. ## Key Characteristics and Function Analysis of the top marker genes reveals a dominant functional signature centered on oxidative phosphorylation and mitochondrial metabolism. * **Mitochondrial Bioenergetics:** The most significant defining markers for the [renal intercalated cell](/details-cell/CL0005010) are an extensive collection of genes encoding subunits of the mitochondrial respiratory chain complexes. This includes multiple cytochrome c oxidase subunits ([COX7C](/details-gene/1350), [COX4I1](/details-gene/1327), [COX6C](/details-gene/1345), [COX5B](/details-gene/1329), [COX8A](/details-gene/1351), [COX7A2](/details-gene/1347), and [COX6B1](/details-gene/1340)), ATP synthase subunits ([ATP5MK](/details-gene/84833), [ATP5F1B](/details-gene/506), [ATP5PF](/details-gene/522), [ATP5MG](/details-gene/10632), and [ATP5F1E](/details-gene/514)), and components of Complex I ([NDUFA4](/details-gene/4697)) and Complex III ([UQCRB](/details-gene/7381), [UQCR11](/details-gene/10975)). The high specificity (high `csi_z` scores) of this entire gene set suggests that a high capacity for aerobic respiration is not just a feature but a core element of this cell's specialized identity. This immense ATP-generating capacity is consistent with the high energy requirement for the V-type H+-ATPases that actively pump protons to regulate pH. * **Metabolic and Cytoskeletal Support:** The signature also includes genes like [LDHB](/details-gene/3945), involved in lactate metabolism, and [SLC25A6](/details-gene/293), an ADP/ATP translocase crucial for exporting mitochondrial ATP to the cytoplasm. The presence of [MYL12B](/details-gene/103910), a myosin regulatory light chain, as a specific marker suggests that cytoskeletal dynamics, likely involved in the trafficking of transporter-laden vesicles to the plasma membrane, are also a key specialized function. The calcium-binding protein [S100A6](/details-gene/6277) may indicate a role for calcium signaling in regulating these metabolic and trafficking processes. * **Defining by Absence (Anti-Markers):** The lack of specificity for many ubiquitous "housekeeping" genes is informative. Genes involved in general transcription ([BTF3](/details-gene/689)), translation ([EEF1D](/details-gene/1936)), protein degradation ([UBC](/details-gene/7316)), and glycolysis ([GAPDH](/details-gene/2597)) have negative CSI scores. This does not imply their absence, but rather that their expression is not a distinguishing feature of these cells. This pattern suggests that [renal intercalated cells](/details-cell/CL0005010) are terminally differentiated cells whose transcriptional and translational landscape is narrowly focused on maintaining their immense bioenergetic infrastructure, rather than on proliferation or broad metabolic flexibility. ## Clinical Significance and Contextual Roles Given their critical role in maintaining blood pH, dysfunction of [renal intercalated cells](/details-cell/CL0005010) can lead to severe metabolic acidosis or alkalosis. The data strongly suggest that the integrity of mitochondrial function is paramount for this cell type. **Overall**, the gene profile highlights a potential vulnerability to mitochondrial toxins or genetic defects affecting oxidative phosphorylation. Conditions that compromise mitochondrial function could selectively impair intercalated cell activity, leading to renal tubular acidosis. While this dataset does not provide a direct disease context, the profound dependence on genes like [COX7C](/details-gene/1350) and [ATP5F1B](/details-gene/506) implies that mutations or dysregulation affecting these pathways would have significant clinical consequences for renal acid-base handling. The high specificity of these markers suggests they could be valuable for identifying intercalated cell damage or dysfunction in kidney pathologies. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The extreme transcriptomic specialization in oxidative phosphorylation reflects a cellular architecture dominated by an unusually high density of mitochondria. This adaptation is essential to generate the supraphysiological amounts of ATP required to fuel the constant, high-capacity proton pumping by V-type H+-ATPases, which is the cell's primary homeostatic function. * **Surprising Findings:** The negative specificity scores for canonical housekeeping genes like [GAPDH](/details-gene/2597) and [UBC](/details-gene/7316) are notable. This suggests the cell's metabolic identity is so heavily skewed towards oxidative phosphorylation that its profile in other core pathways is less pronounced compared to the average of other cell types. * **Testable Questions:** Can quantitative electron microscopy or mitochondria-specific dyes confirm that [renal intercalated cells](/details-cell/CL0005010) have a significantly higher mitochondrial volume fraction compared to adjacent principal cells in the collecting duct? 2. **Hypothesis:** The coordinated high-specificity expression of numerous distinct subunits for each mitochondrial respiratory complex indicates the assembly of tissue-specific, highly stable "respirasomes" (supercomplexes). These structures may be optimized for maximal, sustained electron flow and minimal reactive oxygen species (ROS) production, a crucial adaptation for a long-lived, terminally differentiated cell with immense energy demands. * **Surprising Findings:** The identification of [MYL12B](/details-gene/103910), a myosin component, as a top-20 specific marker is unexpected in a context dominated by metabolic genes. This suggests a tight functional coupling between ATP production and actomyosin-dependent physical processes, such as the regulated trafficking and insertion/retrieval of proton pumps into the plasma membrane, which is a known mechanism for modulating activity. * **Testable Questions:** Does blue native PAGE (BN-PAGE) analysis of mitochondrial extracts from [renal intercalated cells](/details-cell/CL0005010) reveal a unique pattern or stoichiometry of respiratory supercomplexes compared to other epithelial cells? Furthermore, does inhibition of myosin activity block the cell's response to an acid-base challenge?