Details for: CL0010011

Cell ID: CL0010011

Cell Name: cerebral cortex GABAergic interneuron

Description: A GABAergic interneuron whose soma is located in the cerebral cortex.

Selected Context(s): Overall

Gene Significance Landscape

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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 cerebral cortex GABAergic interneuron 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 cerebral cortex GABAergic interneuron. 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 cerebral cortex GABAergic interneuron. 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 cerebral cortex GABAergic interneuron. 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.

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Target Cell for CSI:  cerebral cortex GABAergic interneuron (CL0010011)

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Node size also reflects Target Cell CSI magnitude.
Node Color (Target Cell CSI in specific network):
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 N/A or Not Sig.
Edges (Interactions):
 STRING (Protein-Protein)
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 Colors vary by pathway category; default arrow applies.

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## Summary The **cerebral cortex GABAergic interneuron** ([cerebral cortex GABAergic interneuron](/details-cell/CL0010011)) is a key inhibitory neuron of the cerebral cortex. Based on its gene significance profile, this cell is characterized by a robust and specialized molecular machinery dedicated to neuronal identity, synaptic transmission, and intricate transcriptional and post-transcriptional regulation. The high specificity scores for genes like the transcription factor [MYT1L](/details-gene/23040) and the splicing regulator [SRRM4](/details-gene/84530) suggest a tightly controlled program maintains its distinct phenotype. Furthermore, the prominence of synaptic vesicle protein [SYT1](/details-gene/6857) underscores its fundamental role in rapid, calcium-dependent neurotransmission, critical for modulating cortical circuits. ## Key Characteristics and Function **Overall**, the gene expression signature of the [cerebral cortex GABAergic interneuron](/details-cell/CL0010011) points to a highly specialized cell with demanding metabolic and regulatory needs. Its function can be understood through several key biological themes: * **Neuronal Identity and Synaptic Function:** The identity of this cell is strongly defined by neuron-specific regulatory factors. [MYT1L](/details-gene/23040), a transcription factor involved in neuronal development, and [SRRM4](/details-gene/84530), a brain-specific splicing factor, show high specificity (PRS of 99.6% and 99.2%, respectively), indicating their crucial role in establishing and maintaining the interneuron's molecular architecture. Functionally, the high significance of [SYT1](/details-gene/6857), the primary calcium sensor for synaptic vesicle exocytosis, confirms its role in neurotransmission. Interestingly, the high score for the AMPA receptor subunit [GRIA1](/details-gene/2890) suggests that this inhibitory neuron is itself under the control of strong excitatory glutamatergic inputs, positioning it as a critical node for integrating and balancing cortical network activity. * **Transcriptional and Post-transcriptional Regulation:** Beyond neuron-specific factors, there is a prominent signature of genes involved in general gene expression regulation. This includes [YBX1](/details-gene/4904) (negative regulation of transcription), histone variants [H3 3A](/details-gene/3020) and [H3 3B](/details-gene/3021) (chromatin structure), and multiple heterogeneous nuclear ribonucleoproteins like [HNRNPDL](/details-gene/9987) and [HNRNPA1](/details-gene/3178) (mRNA processing). This suggests that the cell's state is maintained by complex, multi-layered regulatory control. * **Energy Metabolism:** The cell appears to have high energy demands, consistent with sustained neural activity. This is indicated by the high significance of nuclear-encoded mitochondrial proteins, including the ATP/ADP antiporter [SLC25A6](/details-gene/293) and cytochrome c oxidase subunits [COX7C](/details-gene/1350) and [COX7A2](/details-gene/1347). These components are essential for oxidative phosphorylation and ATP production. * **Anti-Markers and Distinctive Features:** The anti-marker profile reveals what this cell is not. A striking observation is the strong negative significance for numerous core mitochondrial-encoded genes of the electron transport chain, such as [COX1](/details-gene/4512), [COX2](/details-gene/4513), [CYTB](/details-e-gene/4519), and multiple NADH dehydrogenase subunits ([ND1](/details-gene/4535), [ND3](/details-gene/4537), [ND5](/details-gene/4540)). This paradoxical finding, where nuclear-encoded mitochondrial genes are positive markers while mitochondrial-encoded ones are negative markers, may suggest a unique metabolic specialization or a distinct stoichiometric assembly of respiratory complexes compared to other cell types in this dataset. Additionally, the low significance of the MHC class I component [B2M](/details-gene/567) is consistent with the immune-privileged status of the central nervous system. ## Clinical Significance and Contextual Roles As only an **Overall** context is provided, the analysis focuses on the general clinical relevance of the key marker genes. Several top markers for the [cerebral cortex GABAergic interneuron](/details-cell/CL0010011) are directly implicated in neurodevelopmental disorders, highlighting the critical role of this cell type in brain health. * Mutations in the neuron-specific transcription factor [MYT1L](/details-gene/23040) are known to cause a syndrome characterized by intellectual disability and behavioral abnormalities. Its high specificity in this cell type reinforces the idea that dysfunction of cortical interneurons is a key pathological mechanism in this condition. * Similarly, variants in [SYT1](/details-gene/6857) are associated with SYT1-related developmental and epileptic encephalopathy, a severe disorder also known as Baker-Gordon syndrome. This directly links the core synaptic machinery of these interneurons to seizure activity and cognitive impairment. * The high significance of the glutamate receptor subunit [GRIA1](/details-gene/2890) is also clinically relevant, as mutations in this gene are associated with intellectual developmental disorder. This suggests that deficits in the excitatory inputs that regulate these inhibitory neurons can lead to profound neurological dysfunction. Collectively, the genetic signature strongly implicates the proper functioning of [cerebral cortex GABAergic interneurons](/details-cell/CL0010011) in maintaining cognitive function and preventing neurological diseases like epilepsy and intellectual disability. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The identity and function of cerebral cortex GABAergic interneurons are maintained by a specialized, multi-layered regulatory network where the neuron-specific splicing factor [SRRM4](/details-gene/84530) orchestrates a unique proteome essential for inhibitory synaptic transmission. * **Surprising Findings:** The high significance of a splicing regulator ([SRRM4](/details-gene/84530)) is on par with that of a master transcription factor ([MYT1L](/details-gene/23040)), suggesting that post-transcriptional regulation is as crucial as transcriptional initiation in defining this cell's phenotype. * **Testable Questions:** Does conditional knockout of [SRRM4](/details-gene/84530) specifically in cortical interneurons lead to aberrant splicing of key synaptic genes (e.g., neurexins, ion channels) and result in impaired inhibitory postsynaptic currents or altered network oscillations in vivo? 2. **Hypothesis:** Cerebral cortex GABAergic interneurons possess a unique metabolic profile characterized by a non-canonical stoichiometry of oxidative phosphorylation complexes, which is reflected by the discrepancy between the high expression of nuclear-encoded subunits ([COX7C](/details-gene/1350), [SLC25A6](/details-gene/293)) and the low relative abundance of mitochondrial-encoded core subunits (e.g., [COX1](/details-gene/4512), [ATP6](/details-gene/4508)). * **Surprising Findings:** The stark opposition in significance between nuclear- and mitochondrial-encoded respiratory genes is highly atypical for a neuron, a cell type traditionally viewed as being heavily reliant on oxidative phosphorylation. This challenges conventional models of neuronal metabolism. * **Testable Questions:** Using proteomics or high-resolution respirometry on isolated cortical interneurons, can a different ratio of respiratory supercomplexes be observed compared to neighboring excitatory neurons? Does this potential metabolic specialization render them uniquely vulnerable to specific metabolic toxins or hypoxic conditions?