SLC6A3 rs27072: Understanding Your Dopamine Transporter Variant
The rs27072 variant is a single nucleotide polymorphism located within the SLC6A3 gene, which encodes the dopamine transporter protein. This genetic variation has been studied for its potential associations with various behavioral and psychiatric traits, including ADHD and alcohol withdrawal symptoms.
What each genotype means
Increased alcohol withdrawal risk
This genotype has been associated in some studies with a higher risk of experiencing severe symptoms, such as seizures, during alcohol withdrawal. Research regarding its link to ADHD is mixed, with some clinical samples suggesting a potential increase in susceptibility, though findings remain inconsistent across different populations.
This is a common genotype found in many populations, though exact frequencies vary by ancestry.
Reduced alcohol withdrawal risk
Individuals with this genotype may have a lower risk of experiencing seizures during alcohol withdrawal compared to those with the C/C genotype. Some research also suggests a potential for lower odds of ADHD, though these associations are based on statistical trends and do not account for all environmental or genetic factors.
This heterozygous genotype is frequently observed in general population studies.
Reduced alcohol withdrawal risk
Carriers of this genotype have been observed to have a lower risk of alcohol withdrawal seizures in clinical studies of alcohol-dependent individuals. While some evidence points toward lower odds of ADHD, the scientific literature on this variant is complex and results have been inconsistent across different studies.
This genotype is present in the general population, with frequencies varying depending on the specific ancestral background.
What is rs27072?
The rs27072 variant is a specific change in the DNA sequence of the SLC6A3 gene. In genetics, a single nucleotide polymorphism (SNP) like rs27072 represents a variation at a single position in the genome. This particular SNP is located within the SLC6A3 gene, which provides instructions for making the dopamine transporter protein. Scientists track these variations to understand how small differences in our genetic code might influence biological processes or susceptibility to certain conditions. Because rs27072 is a common variant, it is found frequently across many different human populations. Researchers often study such SNPs to determine if they act as markers for specific traits or if they play a functional role in how genes are expressed or how proteins are built. While the variant itself is just a single letter change, its presence is often analyzed alongside other nearby genetic markers to better understand the complex landscape of human genetics.
The Role of the SLC6A3 Gene
The SLC6A3 gene is responsible for producing the dopamine transporter, a protein that plays a critical role in the brain's reward and movement systems. This transporter is responsible for the reuptake of dopamine from the synaptic cleft, the space between neurons, back into the cell that released it. By clearing dopamine from the synapse, the transporter helps regulate the intensity and duration of dopaminergic signaling. Dopamine is a neurotransmitter essential for motivation, focus, and motor control. When the function of the dopamine transporter is altered, it can affect the balance of dopamine in the brain, which is why the SLC6A3 gene is a frequent subject of research in neurology and psychiatry. Understanding how variants like rs27072 might influence this transporter is a key area of study for researchers looking into the genetic underpinnings of behavioral and neurological health.
Research and Associations
Research into rs27072 has explored its potential links to various behavioral and psychiatric traits. Some studies have suggested an association between this variant and ADHD in children, as well as differences in the severity of alcohol withdrawal symptoms, such as seizures, in clinical populations. However, it is important to note that the evidence for these associations is considered moderate and sometimes mixed. Genetic associations are often complex, meaning that a single SNP rarely acts alone to cause a condition. Instead, traits are usually influenced by a combination of many genetic factors, environmental influences, and lifestyle choices. While some studies have reported statistically significant findings, these results may not be consistent across all populations or study designs. Consequently, while rs27072 is a recognized marker in the scientific literature, it should not be viewed as a definitive predictor of any specific health outcome or behavioral trait.
Interpreting Your Genetic Information
If you have received information about your rs27072 genotype, it is important to understand what this means in a broader context. Genetic testing can provide insights into your biological makeup, but it does not provide a medical diagnosis. The associations linked to rs27072 are based on statistical observations in research groups, not individual predictions. You cannot use this information to diagnose yourself or others with a condition. If you are concerned about behavioral health, ADHD, or substance use, the most appropriate step is to consult with a qualified healthcare professional. They can provide a comprehensive evaluation that considers your personal history, symptoms, and other relevant factors. Never make changes to your health management or medication based on genetic test results without first discussing them with your clinician or pharmacist, as they are best equipped to interpret these findings in the context of your overall health.
How common is this variant?
The rs27072 variant is common in most populations, with a global minor allele frequency reported at approximately 0.19.
Frequently asked questions
Is rs27072 a diagnostic test for ADHD?
No, rs27072 is not a diagnostic test for ADHD. While some research has explored statistical associations between this variant and ADHD, it is not used in clinical settings to diagnose the condition.
Can I use my rs27072 result to predict alcohol withdrawal severity?
No, you cannot use this result to predict your personal risk. Research has observed associations in specific study groups, but these findings do not translate into individual clinical predictions.
What should I do if I have the T/T genotype?
The T/T genotype is a common genetic variation. You do not need to take any specific action based on this result, as it is not a medical diagnosis.
Where can I learn more about SLC6A3?
You can find reliable information about the SLC6A3 gene through resources like MedlinePlus Genetics or the National Center for Biotechnology Information (NCBI) Gene database.
Sources & further reading
Educational information only, last refreshed 10/5/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs27072?
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 SLC6A3
This variant in the dopamine transporter gene is linked to neuro-reproductive behavioral traits.
This variant in the dopamine transporter gene is studied for its potential influence on methylphenidate treatment response.
This SNP is part of a haplotype associated with treatment failure in patients receiving methylphenidate therapy.
Variant in the dopamine transporter gene (SLC6A3) associated with methylphenidate response in ADHD patients.
A functional variant in the dopamine transporter gene (DAT1) associated with stress-related cognitive performance and behavioral reactivity.