rs79739740

This variant is located in the CHRNA4 gene.

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GWAS Catalog Trait Associations (3)

Genome-wide significant associations (p < 5×10⁻⁸) from the NHGRI-EBI GWAS Catalog.

cigarettes per day measurement

Saunders GRB et al. “Genetic diversity fuels gene discovery for tobacco and alcohol use.” Nature 612(7941):720-724 (2022)
Allele T
OR 0.04
p 7.0e-34
N 618,489
Large GWAS
European

smoking cessation

Saunders GRB et al. “Genetic diversity fuels gene discovery for tobacco and alcohol use.” Nature 612(7941):720-724 (2022)
Allele T
OR 0.02
p 7.0e-17
N 1,147,272
Large GWAS
European

forced expiratory volume

Schoeler T et al. “Combining cross-sectional and longitudinal genomic approaches to identify determinants of cognitive and physical decline.” Nature Communications 16(1):4524 (2025)
Allele C
OR 0.02
p 3.0e-8
N 373,397
Large GWAS
European
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ClinVar annotation

Likely Benign★☆☆☆
1 submitter3 publications

Autosomal dominant nocturnal frontal lobe epilepsy

View on ClinVar →

About CHRNA4

This gene encodes a nicotinic acetylcholine receptor, which belongs to a superfamily of ligand-gated ion channels that play a role in fast signal transmission at synapses. These pentameric receptors can bind acetylcholine, which causes an extensive change in conformation that leads to the opening of an ion-conducting channel across the plasma membrane. This protein is an integral membrane receptor subunit that can interact with either nAChR beta-2 or nAChR beta-4 to form a functional receptor. Mutations in this gene cause nocturnal frontal lobe epilepsy type 1. Polymorphisms in this gene that provide protection against nicotine addiction have been described. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2012]

View all CHRNA4 variants →

Gene information from NCBI Gene. Variant classifications from ClinVar.

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