GABRG2 rs470399: Understanding This Genetic Variant
The rs470399 variant is a common genetic change located within the GABRG2 gene. It has been studied for its potential association with susceptibility to certain forms of epilepsy and febrile seizures.
What each genotype means
Common genetic profile
This genotype represents the most frequently observed sequence at this position in the GABRG2 gene. Current research does not identify this specific configuration as a primary driver of epilepsy or febrile seizure susceptibility. As with any genetic finding, this does not rule out other factors that may influence neurological health.
This is the most common genotype found across all major global populations.
Common genetic profile
This heterozygous genotype is frequently observed in the general population. While the GABRG2 gene is known to be associated with epilepsy and febrile seizures, this specific variant (rs470399) is generally considered a common polymorphism rather than a pathogenic mutation. There is no strong evidence linking this specific genotype to an increased clinical risk for seizure disorders.
This genotype is common and found at varying frequencies across diverse ancestral groups.
Common genetic profile
This genotype is a common variation at this location in the GABRG2 gene. While rare, pathogenic mutations in GABRG2 are linked to epilepsy and febrile seizures, this specific variant is not typically classified as one of those disease-causing mutations. It is considered a standard variation within the human genome.
This genotype is observed frequently in the general population, though its exact frequency varies by ancestry.
What is rs470399?
The rs470399 variant is a single nucleotide polymorphism (SNP) located within the GABRG2 gene. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant is categorized as a common polymorphism, meaning it is frequently observed across diverse human populations. While many SNPs have no observable effect on health, researchers investigate them to determine if they contribute to the risk of developing specific conditions. In the case of rs470399, the scientific community has explored its potential link to neurological traits, specifically those involving seizure disorders. It is important to note that the presence of this variant does not guarantee the development of any condition, as complex traits like epilepsy are influenced by a combination of multiple genetic factors, environmental influences, and individual biological history.
The Role of the GABRG2 Gene
The GABRG2 gene provides instructions for creating the gamma-2 subunit of the GABA-A receptor. GABA-A receptors are critical components of the brain's signaling system, acting as the primary inhibitory neurotransmitters that help calm neuronal activity. By allowing chloride ions to enter neurons, these receptors prevent the brain from becoming overexcited. The gamma-2 subunit is essential for the proper assembly, trafficking, and clustering of these receptors at the synapse, the junction where nerve cells communicate. When GABRG2 function is disrupted—often through rare, highly penetrant mutations—it can lead to a spectrum of epilepsy syndromes. Because of its central role in maintaining the balance between excitation and inhibition in the brain, researchers focus on this gene to understand how subtle variations might influence an individual's threshold for seizures.
Research and Evidence Strength
The evidence linking rs470399 to epilepsy and febrile seizures is currently considered limited. While rare, severe mutations in GABRG2 are well-documented causes of various epilepsy syndromes, the association of common variants like rs470399 is much more nuanced. Scientific studies have investigated whether this specific SNP contributes to a person's susceptibility to seizures, but results have been mixed or require further validation to establish a definitive clinical impact. Unlike rare, pathogenic mutations that directly cause disease, common variants often have very small individual effects on risk. Consequently, it is difficult to isolate the contribution of rs470399 from the thousands of other genetic variations present in an individual's genome. Current research suggests that while the GABRG2 gene is undeniably important for brain health, the specific role of rs470399 remains a subject of ongoing scientific inquiry rather than a established diagnostic marker.
Population Frequency
The rs470399 variant is classified as a common variant, meaning it is found at significant frequencies across many different ancestral populations. Because it is common, it is present in the genomes of many healthy individuals who do not have epilepsy or any other neurological condition. This high frequency is a key reason why researchers must conduct large-scale studies to determine if the variant has any meaningful association with disease risk. If a variant were only found in people with a specific condition, it would be much easier to link it to that condition. However, because rs470399 is widespread, its presence alone is not a reliable indicator of health outcomes. Population databases continue to track the frequency of this SNP to help scientists better understand its distribution and potential evolutionary history.
Interpreting Your Genetic Information
If you have received information about your rs470399 genotype, it is important to understand that this data is for educational purposes and should not be used for medical diagnosis. Because the evidence linking this variant to epilepsy is limited and the variant itself is common in the general population, it does not provide a clear clinical picture of your health. Genetic risk is rarely determined by a single SNP; rather, it is the result of a complex interplay between your entire genetic profile and environmental factors. You cannot use this information to predict your risk of seizures or to make decisions about medical treatments. If you have concerns about your health, family history of seizures, or neurological symptoms, the most appropriate step is to consult with a qualified healthcare professional or a genetic counselor who can provide context based on your full clinical history.
How common is this variant?
The rs470399 variant is a common polymorphism found across diverse global populations, with its specific allele frequencies varying by ancestry.
Frequently asked questions
Does having the rs470399 variant mean I will develop epilepsy?
No. The rs470399 variant is common in the general population and is not a direct cause of epilepsy. Most people who carry this variant do not have any seizure disorders.
Should I be worried about my rs470399 genotype?
There is no reason for concern based on this variant alone. It is a common genetic variation, and current evidence does not support using it as a standalone predictor of health.
Can I use this information to change my medication?
No. You should never change or stop any medication based on genetic test results without first consulting your doctor or pharmacist. Genetic variants like this do not provide sufficient information to guide clinical treatment decisions.
Where can I find more reliable information about GABRG2?
You can find authoritative information on the GABRG2 gene through resources like MedlinePlus Genetics or the National Center for Biotechnology Information (NCBI) Gene database. These sites provide scientifically vetted summaries of gene functions and their roles in human health.
Sources & further reading
Educational information only, last refreshed 9/23/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs470399?
Upload a raw DNA file from 23andMe, AncestryDNA, MyHeritage, or FamilyTreeDNA and see this variant — plus thousands more — interpreted in your full report.
Get my report — $29Related variants in GABRG2
This variant in the GABRG2 gene is associated with variations in response to certain anticonvulsant medications and epilepsy susceptibility.
Linked to GABA-A receptor subunit dysfunction, a known mechanism for inherited epilepsy syndromes.
Variant in GABRG2, a gene where mutations can alter GABA-A receptor function and influence seizure thresholds.
A common variant in GABRG2, a gene encoding a GABA-A receptor subunit linked to various epilepsy phenotypes including febrile seizures and GEFS+.
This variant is located in the GABRG2 gene, which encodes the gamma-2 subunit of the GABA-A receptor; variants in this gene are associated with a spectrum of epilepsy syndromes.
Mutations in GABRG2 are linked to a spectrum of epilepsy ranging from simple febrile seizures to severe developmental and epileptic encephalopathies.