DRD2 rs11214607: Understanding Your Genetic Variant
The rs11214607 variant is a single nucleotide polymorphism (SNP) located within the DRD2 gene. Research has identified this specific variant as a secondary signal associated with variations in adult sleep duration among individuals of European ancestry.
What each genotype means
Typical sleep duration profile
This genotype represents the common baseline for this variant in many populations. Research indicates that this variant in the DRD2 gene acts as a secondary signal associated with habitual sleep duration, though the specific impact of this genotype is considered modest and may vary by ancestry.
This is a common genotype found across multiple ancestral groups, though exact frequencies vary significantly by population.
Potential sleep duration influence
Carrying one copy of the G allele has been identified in genetic studies as a secondary signal associated with variations in self-reported sleep duration. Because this association is complex and influenced by other genetic and environmental factors, it is not a diagnostic indicator of sleep patterns.
This heterozygous genotype is observed at varying frequencies in diverse populations, including European, African, and Asian cohorts.
Associated with sleep duration
Individuals with this genotype carry two copies of the G allele, which has been statistically linked to variations in habitual sleep duration in large-scale association studies. As this is a complex trait influenced by many genes, this result should be viewed as a minor contributor to sleep patterns rather than a definitive predictor.
This genotype is common, with frequencies ranging from approximately 7% to 38% depending on the specific ancestral population studied.
What is rs11214607?
The variant rs11214607 is a specific change in the DNA sequence, known as a single nucleotide polymorphism or SNP. It is located within the DRD2 gene, which provides instructions for making the dopamine receptor D2 protein. In the context of human genetics, SNPs are the most common type of genetic variation, representing a difference in a single building block of DNA. While many SNPs have no effect on health or traits, some are identified through genome-wide association studies (GWAS) as being statistically linked to specific physical or behavioral characteristics. The rs11214607 variant is categorized as a trait-associated marker, meaning it has been observed to occur more frequently in individuals who share a particular trait—in this case, differences in sleep duration—compared to those who do not. It is important to note that being associated with a trait does not mean the variant directly causes that trait, but rather that it serves as a genetic signpost.
The Role of the DRD2 Gene
The DRD2 gene encodes the dopamine receptor D2, a protein that plays a critical role in the brain's reward and motivation pathways. Dopamine is a neurotransmitter, a chemical messenger that transmits signals between nerve cells. By binding to the D2 receptor, dopamine helps regulate various functions, including movement, emotional response, and the ability to experience pleasure and pain. Because of its central role in neurological signaling, the DRD2 gene has been a frequent subject of study in relation to neuropsychiatric conditions and behavioral traits. While the primary function of the receptor is well-understood, the impact of specific variants like rs11214607 on the actual expression or efficiency of the receptor is a complex area of ongoing research. Variations in this gene are thought to influence how individuals process dopamine, which may indirectly affect physiological processes such as the regulation of sleep-wake cycles.
Evidence and Associations
The association between rs11214607 and sleep duration is supported by research, including studies involving the CARe consortium. In these investigations, researchers compared the genomes of thousands of individuals to identify common genetic factors that might contribute to differences in how long people sleep. The evidence for this specific SNP is considered moderate, as it often appears as a secondary signal in larger genetic analyses. This means that while it is statistically linked to sleep duration in European populations, it is one of many genetic and environmental factors that influence sleep. It is crucial to understand that sleep duration is a complex, polygenic trait, meaning it is influenced by the combined effects of many different genes, as well as lifestyle, environment, and health status. Consequently, this variant should not be viewed as a definitive predictor of an individual's sleep habits, but rather as a small piece of a much larger biological puzzle.
Population Frequency and Interpretation
The rs11214607 variant is classified as a common variant, meaning it is found at a relatively high frequency across many human populations. Because it is common, a large portion of the general population carries at least one copy of the variant. When interpreting genetic information, it is important to remember that common variants often have small individual effects on traits. The presence of this SNP does not provide a medical diagnosis or a guarantee of specific sleep patterns. Readers should be cautious about over-interpreting genetic data, as the relationship between genotype and phenotype is rarely straightforward. If you have concerns about your sleep quality or duration, it is best to consult with a healthcare professional or a sleep specialist. They can provide a comprehensive evaluation based on your clinical history, lifestyle, and overall health, rather than relying on a single genetic marker.
How common is this variant?
The rs11214607 variant is a common genetic marker, with its various genotypes appearing frequently across diverse ancestral populations.
Frequently asked questions
Does having this variant mean I have a sleep disorder?
No, having this variant does not mean you have a sleep disorder. It is simply a genetic marker associated with variations in sleep duration within a population, not a diagnostic tool for medical conditions.
Can I change my sleep habits based on this SNP?
Genetic information should not be used to dictate your lifestyle or medical decisions. If you are struggling with sleep, focus on established sleep hygiene practices and consult a healthcare provider for personalized advice.
Is this variant found in all populations?
While the association with sleep duration has been specifically noted in European populations, the variant itself is common. Genetic associations can vary significantly between different ancestral groups due to differences in genetic background.
Where can I learn more about my own genetic data?
If you have taken a direct-to-consumer genetic test, you can often download your raw data. However, interpreting this data requires caution, and it is recommended to discuss any health-related findings with a genetic counselor or physician.
Sources & further reading
Educational information only, last refreshed 10/7/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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