GABRG2 rs3764147: Understanding This Genetic Variant
The rs3764147 variant is located within the GABRG2 gene, which plays a vital role in the brain's inhibitory signaling pathways. Research has investigated this gene's involvement in various epilepsy syndromes, though the specific impact of this individual variant remains a subject of ongoing scientific study.
What each genotype means
Common genetic variant profile
This genotype represents the most common form of this variant in the general population. While the GABRG2 gene is known to be associated with various epilepsy syndromes when specific rare mutations are present, this common variant does not independently indicate a clinical diagnosis. You should not interpret this result as a sign of increased risk for neurological conditions.
This is the most frequent genotype observed across most global populations.
Common genetic variant profile
This genotype is a common variation found in the GABRG2 gene. Current scientific literature does not identify this specific common genotype as a standalone cause of epilepsy or other health conditions. It is considered a normal variation in the human genome, and no specific medical action is required based on this result.
This genotype is frequently observed in diverse populations worldwide.
Common genetic variant profile
This genotype is a standard variation within the GABRG2 gene. Research indicates that while rare, pathogenic mutations in this gene can influence seizure susceptibility, this common genotype is not associated with such risks. This result is considered a normal finding and does not require clinical follow-up.
This genotype is common and found at varying frequencies across different ancestral groups.
What is rs3764147 and Where is it Located?
The identifier rs3764147 refers to a specific single nucleotide polymorphism (SNP) situated within the GABRG2 gene. This gene is located on chromosome 5 and provides the instructions for creating the gamma-2 subunit of the GABA-A receptor. In the context of human genetics, SNPs like rs3764147 represent common variations where a single "letter" of the DNA code differs between individuals. Because this variant sits within a gene responsible for critical neurological functions, researchers often study such sites to determine if they influence how the brain processes signals or if they contribute to a person's susceptibility to certain neurological conditions. It is important to note that the presence of a variant does not automatically imply a health outcome, as most common genetic variations are part of the natural diversity found in the human population.
The Role of the GABRG2 Gene
The GABRG2 gene is essential for the proper function of GABA-A receptors, which are the primary mediators of fast inhibitory neurotransmission in the central nervous system. By allowing chloride ions to enter neurons, these receptors help "calm" brain activity, preventing the over-excitation that can lead to seizures. The gamma-2 subunit, encoded by GABRG2, is particularly important for the receptor's ability to respond to benzodiazepines and for its proper trafficking to the cell surface. When the GABRG2 gene is altered, it can potentially disrupt this inhibitory balance. While severe mutations in this gene have been linked to specific epilepsy syndromes, such as Dravet syndrome or childhood absence epilepsy, the functional consequences of common variants like rs3764147 are often more subtle and require extensive population-level data to fully understand.
Research Associations and Evidence Strength
Scientific literature has long explored the link between GABRG2 and epilepsy. While certain rare, pathogenic mutations in GABRG2 are well-documented as causes of epilepsy, the evidence for common variants like rs3764147 is generally considered moderate or exploratory. Some studies have examined various GABRG2 polymorphisms in relation to febrile seizures and idiopathic generalized epilepsy, finding that certain alleles may appear more frequently in affected groups compared to healthy controls. However, these associations are not always consistent across different populations, and the presence of a variant does not serve as a diagnostic tool. Because epilepsy is a complex condition influenced by many genes and environmental factors, researchers emphasize that a single SNP rarely acts as a sole cause for a disorder. Current evidence suggests that while GABRG2 is a significant gene in neurology, the clinical relevance of rs3764147 should be interpreted with caution.
Population Frequency
The rs3764147 variant is considered common, meaning it is found at significant frequencies across various global populations. Genetic databases like gnomAD indicate that the alleles for this variant are widely distributed, reflecting the natural variation inherent in the human genome. Because it is a common variant, it is present in many healthy individuals who do not exhibit any signs of epilepsy or neurological conditions. This high frequency reinforces the idea that the variant is likely a normal part of human genetic diversity rather than a rare, disease-causing mutation. Researchers use this frequency data to help distinguish between common variations that have little to no impact on health and rare variants that may have a more pronounced effect on protein function.
What You Can and Cannot Do With This Information
Understanding your genetic data can be an educational experience, but it is important to maintain realistic expectations. You cannot use information about the rs3764147 variant to diagnose yourself with a medical condition or to predict future health outcomes. Genetic associations are statistical observations made across large groups of people and do not necessarily apply to any single individual. 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. They can provide context based on your personal medical history and clinical presentation. Furthermore, if you are currently taking medication for a condition, never make changes to your treatment plan based on genetic test results without first discussing it with your clinician or pharmacist.
How common is this variant?
The rs3764147 variant is common across diverse ancestral populations, with its various genotypes appearing frequently in healthy individuals worldwide.
Frequently asked questions
Does having the rs3764147 variant mean I will develop epilepsy?
No. This variant is a common genetic polymorphism found in many healthy people. It is not a diagnostic marker for epilepsy, and its presence does not mean you will develop any neurological condition.
Is GABRG2 a dangerous gene?
GABRG2 is a critical gene for normal brain function, specifically for inhibitory signaling. While rare, severe mutations in this gene can be associated with epilepsy, but common variants like rs3764147 are generally considered part of normal human genetic variation.
Should I get tested for GABRG2 variants?
Genetic testing for specific variants is typically only recommended by healthcare providers if there is a strong clinical reason, such as a family history of specific epilepsy syndromes. You should discuss the necessity of any genetic testing with a doctor or genetic counselor.
Can I change my diet or lifestyle to offset this variant?
Because this variant is common and not a confirmed cause of disease, there is no evidence-based lifestyle or dietary change specifically recommended for it. Always focus on general healthy habits and consult a doctor for personalized medical advice.
Sources & further reading
Educational information only, last refreshed 10/17/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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This variant in the GABRG2 gene is associated with variations in response to certain anticonvulsant medications and epilepsy susceptibility.
Variant in GABRG2, a gene where mutations can alter GABA-A receptor function and influence seizure thresholds.
Mutations in GABRG2 are linked to a spectrum of epilepsy ranging from simple febrile seizures to severe developmental and epileptic encephalopathies.
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.
A common variant in GABRG2, a gene encoding a GABA-A receptor subunit linked to various epilepsy phenotypes including febrile seizures and GEFS+.
Linked to GABA-A receptor subunit dysfunction, a known mechanism for inherited epilepsy syndromes.