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CHRNA4
Overview
Alias
BFNC; EBN; EBN1; NACHR; NACHRA4; NACRA4
Associated disorders
The CHRNA4 gene is associated with autosomal dominant nocturnal frontal lobe epilepsy (MedGen UID: 324932).
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CHRNA4
Order this gene as a single gene test.
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Invitae tests that include this gene:
Invitae Epilepsy Panel 125 genes
Clinical sensitivity
Pathogenic variants in CHRNA4 are associated with 10-20% of clinical cases of familial autosomal dominant nocturnal frontal lobe epilepsy, and rarely cause sporadic autosomal dominant nocturnal frontal lobe epilepsy.
Gene function
Nicotinic acetylcholine receptors are neuronal receptors that bind to the neurotransmitter acetylcholine and trigger an influx of cations to stimulate the neuron to fire. The CHRNA4 gene encodes an alpha subunit of the nicotinic acetylcholine receptor (PMID: 25717303).
References
- Becchetti, A, et al. The role of nicotinic acetylcholine receptors in autosomal dominant nocturnal frontal lobe epilepsy. Front Physiol. 2015; 6:22. PMID: 25717303
- Kurahashi, H, Hirose, S. Autosomal Dominant Nocturnal Frontal Lobe Epilepsy. 2002 May 16. In: Pagon, RA, et al, editors. GeneReviews(®) (Internet). University of Washington, Seattle. PMID: 20301348
Assay
Assay and technical information
Invitae is a College of American Pathologists (CAP)-accredited and Clinical Laboratory Improvement Amendments (CLIA)-certified clinical diagnostic laboratory performing full-gene sequencing and deletion/duplication analysis using next-generation sequencing technology (NGS).
Our sequence analysis covers clinically important regions of each gene, including coding exons, +/- 10 base pairs of adjacent intronic sequence, and select noncoding variants. Our assay provides a Q30 quality-adjusted mean coverage depth of 350x (50x minimum, or supplemented with additional analysis). Variants classified as pathogenic or likely pathogenic are confirmed with orthogonal methods, except individual variants that have high quality scores and previously validated in at least ten unrelated samples.
Our analysis detects most intragenic deletions and duplications at single exon resolution. However, in rare situations, single-exon copy number events may not be analyzed due to inherent sequence properties or isolated reduction in data quality. If you are requesting the detection of a specific single-exon copy number variation, please contact Client Services before placing your order.
| Gene | Transcript reference | Sequencing analysis | Deletion/Duplication analysis |
|---|---|---|---|
| CHRNA4 | NM_000744.6 |
Resources
Patient resources
Patient guide: Genetic testing simplifiedReferences
- Becchetti, A, et al. The role of nicotinic acetylcholine receptors in autosomal dominant nocturnal frontal lobe epilepsy. Front Physiol. 2015; 6:22. PMID: 25717303
- Kurahashi, H, Hirose, S. Autosomal Dominant Nocturnal Frontal Lobe Epilepsy. 2002 May 16. In: Pagon, RA, et al, editors. GeneReviews(®) (Internet). University of Washington, Seattle. PMID: 20301348
