DRD2 rs111334073: Understanding This Rare Genetic Variant
The rs111334073 variant is a rare genetic change located within the DRD2 gene, which provides instructions for making the dopamine D2 receptor. This variant is currently being studied for its potential involvement in the regulation of stress-induced behavioral responses.
What each genotype means
Typical stress response profile
This genotype represents the most common genetic sequence observed at this location in the DRD2 gene. Research into this specific rare variant is currently limited, and it is not established as a primary driver of stress-related behavioral differences. As with any genetic information, this should be viewed as one small piece of a complex biological puzzle rather than a definitive indicator of health or behavior.
This is the predominant genotype found in the vast majority of the global population.
Rare variant carrier
You carry one copy of a rare genetic variant in the DRD2 gene, which is involved in dopamine signaling pathways related to stress response. Because this variant is extremely rare, current scientific evidence is insufficient to determine if it has any meaningful impact on your individual stress response or behavioral traits. You should not interpret this result as a medical diagnosis or a predictor of specific psychological outcomes.
This genotype is extremely rare, occurring in approximately 1 in 360,000 individuals based on current population databases.
Rare variant homozygote
You carry two copies of this rare DRD2 variant. While the DRD2 gene is known to play a role in dopamine regulation and stress-induced behaviors, the clinical significance of this specific rare variant remains unknown due to a lack of large-scale studies. There is currently no evidence to suggest this genotype requires specific medical attention or lifestyle changes.
This genotype is exceptionally rare and is not observed in the vast majority of human population studies.
What is rs111334073?
The rs111334073 variant is a single nucleotide polymorphism (SNP) found within the DRD2 gene. In genetics, a SNP represents a variation at a single position in the DNA sequence. This specific variant is classified as rare, meaning it appears in a very small percentage of the global population. It is cataloged in public databases as a marker of interest for researchers investigating how subtle changes in our genetic code might influence brain chemistry. Because it is rare, much of the data surrounding this specific location is still emerging, and scientists are working to determine if it has a functional impact on how the body processes dopamine or responds to environmental stressors.
The Role of the DRD2 Gene
The DRD2 gene encodes the dopamine D2 receptor, a critical protein in the central nervous system. This receptor acts as a G-protein coupled receptor that helps regulate the activity of dopamine, a neurotransmitter essential for motivation, reward, and motor control. By inhibiting adenylyl cyclase activity, the D2 receptor helps fine-tune the signaling pathways that allow neurons to communicate effectively. Because dopamine is central to how we experience pleasure and manage stress, variations in the DRD2 gene are frequently studied in the context of psychiatric health and behavioral traits. Understanding how this gene functions provides the necessary foundation for interpreting how genetic variants might alter the sensitivity or density of these receptors in the brain.
Research and Evidence Strength
Current evidence regarding the clinical significance of rs111334073 is limited. While the broader DRD2 gene is well-documented in scientific literature for its association with various psychiatric conditions and stress responses, specific data linking rs111334073 to these outcomes is not yet robust. Most research on DRD2 focuses on more common variants, such as the Taq1A polymorphism or the -141C Ins/Del promoter variant. Because rs111334073 is rare, it has not been the primary subject of large-scale genome-wide association studies (GWAS) that would provide definitive evidence of its impact. Consequently, any observed associations between this variant and behavioral traits should be viewed as preliminary. Further research is required to determine if this variant contributes to individual differences in stress resilience or other behavioral phenotypes.
Population Frequency
The rs111334073 variant is extremely rare, with a reported population frequency of approximately 0.000001380. This low frequency indicates that the vast majority of the human population carries the common, or reference, allele at this position. Because the variant is so uncommon, it is difficult to conduct large-scale studies to see if its frequency differs significantly between various ancestral groups. In many cases, rare variants like this are identified in specific cohorts or through high-depth sequencing efforts. The scarcity of this variant means that most individuals will not carry it, and its presence does not necessarily imply a specific health outcome or clinical risk.
Interpreting Your Genetic Information
It is important to understand that having a rare variant like rs111334073 does not serve as a medical diagnosis. Genetic variants are only one piece of a complex puzzle that includes environmental factors, lifestyle, and other genetic influences. Because the evidence for this variant is limited, it cannot be used to predict specific behavioral outcomes or health risks. If you have received information about this variant from a genetic test, it is best to view it as a point of scientific interest rather than a clinical finding. Always consult with a qualified healthcare provider or a genetic counselor to discuss any concerns about your health. Never make changes to your medical care or medication regimen based on genetic data without first consulting your clinician or pharmacist.
How common is this variant?
The rs111334073 variant is very rare, with a reported population frequency of 0.000001380.
Frequently asked questions
Is rs111334073 a cause of stress disorders?
There is currently no evidence to suggest that this variant causes stress disorders. While the DRD2 gene is involved in stress pathways, the specific impact of this rare variant remains unknown.
Should I be worried if I have this variant?
No. Rare variants are common in the human genome, and most do not have a significant impact on health. You should discuss any health concerns with your doctor.
Can I use this information to change my medication?
No. You should never change your medication or treatment plan based on genetic variants. Always consult your clinician or pharmacist before making any changes.
Where can I find more information about DRD2?
You can visit resources like MedlinePlus Genetics or the NCBI Gene database for general information about the DRD2 gene and its known functions.
Sources & further reading
Educational information only, last refreshed 10/17/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs111334073?
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 DRD2
This SNP in the DRD2 gene is frequently studied in the context of psychiatric genetics, particularly regarding dopamine receptor expression and schizophrenia risk.
This variant has been studied for its association with schizophrenia and dopaminergic signaling.
The TaqIB polymorphism in the DRD2 gene is associated with dopamine receptor density and various behavioral and reward-related traits.
The DRD2 TaqIB variant modulates dopamine D2 receptor density and has been investigated for associations with addiction susceptibility and antipsychotic response.
A synonymous coding variant in exon 7 of DRD2 that affects mRNA stability, translation kinetics, and dopamine-related working memory and reward phenotypes.
Known as the DRD2 TaqID polymorphism, this variant alters D2 dopamine receptor gene structure and is implicated in altered striatal dopamine functioning and substance use behavior.