Details for: CL0011005

Cell ID: CL0011005

Cell Name: GABAergic interneuron

Description: The formal and textual definitions of this term will need to be altered if evidence for non-inhibitory GABA-ergic neurons emerges.

Synonyms: GABAergic inhibitory interneuron

Selected Context(s): Overall

Gene Significance Landscape

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Genes

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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 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 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 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 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.

Maximum number of selected genes.
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Select a context for the target cell.
Target Cell for CSI:  GABAergic interneuron (CL0011005)

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

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## Summary The [GABAergic interneuron](/details-cell/CL0011005) is a class of neuron that produces the inhibitory neurotransmitter gamma-aminobutyric acid (GABA), playing a crucial role in modulating neural circuit activity. Analysis of its gene significance profile suggests that the defining characteristic of this cell type, beyond its neurotransmitter identity, is an exceptionally specific and complex program of gene regulation. The most significant markers, as determined by expression specificity (`csi_z`), are not canonical synaptic proteins but are key regulators of chromatin structure, transcription, and post-translational protein modification. Genes such as [TTC3](/details-gene/7267), [NSD3](/details-gene/54904), and [ATRX](/details-gene/546) are highly specific to these interneurons, indicating that their identity and function are maintained by a precise and stable epigenetic and transcriptional state. ## Key Characteristics and Function **Overall**, the gene expression landscape of the [GABAergic interneuron](/details-cell/CL0011005) highlights a profound reliance on sophisticated gene regulatory networks. The top markers can be organized into several key functional clusters: * **Chromatin Remodeling and Transcriptional Control:** A striking number of top markers are involved in epigenetic and transcriptional regulation. This includes histone methyltransferases such as [NSD3](/details-gene/54904), [KMT2E](/details-gene/55904), and [KMT2C](/details-gene/58508), the putative demethylase [JMJD1C](/details-gene/221037), and several chromatin remodeling proteins like [ATRX](/details-gene/546) and [CHD2](/details-gene/1106). The high specificity of transcription coregulators like [CAMTA1](/details-gene/23261) and transcription factors such as [GTF2I](/details-gene/2969) and [ZNF292](/details-gene/23036) further underscores that a unique transcriptional program is central to this cell's identity. * **RNA and Protein Homeostasis:** Beyond transcription, post-transcriptional and post-translational regulation appear to be defining features. The top marker, [TTC3](/details-gene/7267), functions in ubiquitin-protein transferase activity. Additionally, factors involved in RNA processing, such as the RNA-binding protein [LUC7L3](/details-gene/51747) and the P-body component [TNRC6B](/details-gene/23112), show high specificity, suggesting that RNA splicing, stability, and localization are tightly controlled. * **Neuronal Structure and Transport:** The profile includes genes critical for neuronal development and maintenance. [PAFAH1B1](/details-gene/5048), a gene whose mutation causes lissencephaly, is involved in microtubule organization ([Link](https://pubmed.ncbi.nlm.nih.gov/8355785/)). Furthermore, the microtubule motor protein [KIF5C](/details-gene/3800) and the kinesin receptor [KTN1](/details-gene/3895) highlight the importance of active transport within these neurons, likely for distributing essential components to and from synapses. * **Synaptic Function and Signaling:** While regulatory genes dominate the profile, key neuronal signaling components are also present. The glutamate receptor subunit [GRIA2](/details-gene/2891) confirms its role in receiving excitatory inputs. The amyloid precursor protein, [APP](/details-gene/351), a central molecule in Alzheimer's disease, is also a highly specific marker, consistent with its known high expression in neurons. * **Anti-Markers:** Genes with low specificity scores, such as [PRKDC](/details-gene/5591) (DNA repair) and [SQSTM1](/details-gene/8878) (autophagy), are involved in ubiquitous cellular processes. Their lack of specificity suggests that while these functions are active, they are not uniquely prominent in defining the [GABAergic interneuron](/details-cell/CL0011005) compared to other cell types. ## Clinical Significance and Contextual Roles The gene signature of the [GABAergic interneuron](/details-cell/CL0011005) is strongly associated with a range of severe neurodevelopmental and neurodegenerative disorders. The high specificity of these disease-implicated genes suggests that GABAergic interneurons may be a particularly vulnerable cell population or a key contributor to the pathology of these conditions. * **Neurodevelopmental Syndromes:** Several of the most specific markers are directly causative of or strongly linked to congenital brain disorders. * **[TTC3](/details-gene/7267):** This top-ranking gene is located within the Down syndrome critical region on chromosome 21 and is considered a candidate gene responsible for some DS phenotypes ([Link](https://doi.org/10.1093/dnares/3.1.9), [Link](https://doi.org/10.1093/oxfordjournals.jbchem.a021485)). * **[ATRX](/details-gene/546):** Mutations in this chromatin regulator cause ATR-X syndrome, which is characterized by severe X-linked mental retardation ([Link](https://doi.org/10.1093/hmg/5.12.1899)). * **[PAFAH1B1](/details-gene/5048):** Also known as *LIS1*, mutations in this gene disrupt neuronal migration and are the primary cause of Miller-Dieker lissencephaly, a severe brain malformation characterized by a smooth cerebral surface ([Link](https://doi.org/10.1038/364717a0)). * **Neurodegenerative Disease:** * **[APP](/details-gene/351):** As the precursor to the amyloid-beta peptide, [APP](/details-gene/351) is central to the pathogenesis of Alzheimer's disease ([Link](https://doi.org/10.1038/325733a0)). Its high specificity in these interneurons points to their potential involvement in disease progression. The collective significance of these genes suggests that the precise regulation of chromatin state, gene expression, protein turnover, and cytoskeletal dynamics is paramount for the proper development and function of [GABAergic interneurons](/details-cell/CL0011005). Disruption of these core processes appears to be a convergent mechanism underlying several distinct and severe neurological diseases. ## Potential Mechanisms and Research Directions 1. **Hypothesis:** The fundamental identity of [GABAergic interneurons](/details-cell/CL0011005) is maintained by a highly specific and stable epigenetic landscape. The prominence of numerous chromatin-modifying enzymes ([NSD3](/details-gene/54904), [ATRX](/details-gene/546), [KMT2E](/details-gene/55904), [CHD2](/details-gene/1106)) as top-ranking specific markers suggests that their cell-type identity is actively enforced at the chromatin level. Perturbations in this regulatory network may represent a shared etiology for various neurodevelopmental disorders impacting inhibitory circuits. * **Surprising Findings:** The most distinctive molecular features of these neurons are not components of GABAergic synapses but rather a large suite of master regulators of gene expression, many of which are directly linked to human developmental syndromes. * **Testable Questions:** What are the specific genomic targets of the histone methyltransferase [NSD3](/details-gene/54904) in [GABAergic interneurons](/details-cell/CL0011005)? Does conditional knockout of [ATRX](/details-gene/546) specifically in interneurons disrupt their maturation, connectivity, or long-term stability? 2. **Hypothesis:** GABAergic interneurons are uniquely reliant on specific pathways of post-translational protein degradation to maintain cellular homeostasis and synaptic function. The identification of the ubiquitin-protein ligase [TTC3](/details-gene/7267) as the most specific gene marker suggests that protein turnover is not a mere housekeeping function but a highly specialized process in these cells. This pathway may be critical for regulating the levels of key synaptic or signaling proteins, and its dysregulation could contribute to the cognitive deficits seen in Down syndrome. * **Surprising Findings:** A ubiquitin ligase ([TTC3](/details-gene/7267)) has a higher specificity score than any receptor, ion channel, or neurotransmitter synthesis enzyme, positioning protein degradation as a uniquely defining feature of this cell type. * **Testable Questions:** Using proteomics, can we identify the specific protein substrates of [TTC3](/details-gene/7267) in [GABAergic interneurons](/details-cell/CL0011005)? Does modulating [TTC3](/details-gene/7267) activity alter the strength or plasticity of inhibitory synapses?