PER3 rs11579477: What Your Genotype Means
The rs11579477 variant is a genetic marker located within the PER3 gene, which is essential for regulating circadian rhythms. Research suggests this specific variant is associated with variations in delta power during sleep, a key indicator of sleep intensity.
What each genotype means
Typical sleep power profile
This genotype is associated with baseline levels of delta power during sleep, which is a marker of sleep intensity. Research on PER3 variants often focuses on how these genetic differences influence sleep homeostasis and cognitive performance, though the specific functional impact of this SNP remains limited in scope. This result should not be used for medical diagnosis or to infer specific sleep disorders.
This genotype is common in most global populations, though exact frequencies vary by ancestry.
Typical sleep power profile
This genotype is associated with baseline levels of delta power during sleep, which is a marker of sleep intensity. Research on PER3 variants often focuses on how these genetic differences influence sleep homeostasis and cognitive performance, though the specific functional impact of this SNP remains limited in scope. This result should not be used for medical diagnosis or to infer specific sleep disorders.
This genotype is common in most global populations, though exact frequencies vary by ancestry.
Typical sleep power profile
This genotype is associated with baseline levels of delta power during sleep, which is a marker of sleep intensity. Research on PER3 variants often focuses on how these genetic differences influence sleep homeostasis and cognitive performance, though the specific functional impact of this SNP remains limited in scope. This result should not be used for medical diagnosis or to infer specific sleep disorders.
This genotype is common in most global populations, though exact frequencies vary by ancestry.
Understanding the rs11579477 Variant
The rs11579477 variant is a single nucleotide polymorphism (SNP) found within the PER3 gene. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific marker is categorized as a trait-associated variant, meaning it has been identified in studies looking for links between specific genetic locations and observable human characteristics. While the evidence linking rs11579477 to sleep traits is considered limited, it remains a subject of interest for researchers studying the genetic architecture of sleep. It is important to note that most human traits are polygenic, meaning they are influenced by many different genes and environmental factors working in concert, rather than a single genetic change.
The Role of the PER3 Gene
The PER3 gene, or Period Circadian Regulator 3, encodes a protein that is a core component of the human biological clock. This gene family is fundamental to maintaining the body's internal rhythms, which govern cycles of sleep, wakefulness, metabolism, and behavior. PER3 functions within a complex feedback loop that helps the body anticipate and respond to the 24-hour light-dark cycle. By modulating the timing and intensity of sleep, PER3 helps ensure that sleep is restorative. Because of its central role in these processes, variations in the PER3 gene are frequently studied in the context of sleep-wake regulation, circadian rhythm disorders, and individual differences in how people respond to sleep deprivation or shift work.
Research and Evidence Strength
Current research into rs11579477 has identified associations with delta power during sleep, which is a measure of slow-wave activity often used to quantify sleep intensity. However, the evidence strength for this specific association is currently classified as limited. While some studies have shown that variations in PER3 can influence sleep structure and cognitive performance following sleep loss, these findings often require larger, more diverse cohorts to confirm the consistency of the effect across different populations. It is essential to distinguish between a statistical association found in a research study and a definitive medical diagnosis. Genetic associations provide a window into biological mechanisms, but they do not account for the full complexity of human sleep, which is also heavily influenced by lifestyle, environment, and overall health.
Interpreting Your Genetic Information
If you have received information about your rs11579477 genotype, it is important to view it as a small piece of a much larger biological puzzle. This information is educational and intended to help you understand the current state of genomic research. It is not a diagnostic tool and cannot predict your specific sleep quality or health outcomes. You cannot use this information to make medical decisions, such as changing your sleep habits or seeking treatment for sleep disorders, without consulting a healthcare professional. If you are concerned about your sleep patterns, quality, or daytime performance, the most effective approach is to discuss these issues with a doctor or a sleep specialist who can evaluate your symptoms in the context of your overall health history.
How common is this variant?
The rs11579477 variant is considered a common SNP, with its various genotypes appearing frequently across diverse human populations.
Frequently asked questions
Can this genetic variant diagnose a sleep disorder?
No, this variant cannot diagnose any sleep disorder. Genetic associations are statistical findings from research studies and do not serve as medical diagnoses for individuals.
Does my genotype mean I will have poor sleep quality?
Not necessarily. Sleep quality is influenced by a wide range of factors, including genetics, environment, stress, and lifestyle. A single SNP like rs11579477 has a very small impact on the overall complexity of sleep.
Should I change my sleep habits based on this result?
You should not change your medical or sleep habits based on this genetic information. If you have concerns about your sleep, please consult with a qualified healthcare provider.
Where can I learn more about the PER3 gene?
You can find reliable information about the PER3 gene through resources like MedlinePlus Genetics or the NCBI Gene database. These sites provide comprehensive summaries of gene functions and their roles in human health.
Sources & further reading
Educational information only, last refreshed 10/15/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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This SNP is associated with chronotype scores in older adults, suggesting a role in circadian regulation.
Common synonymous variant in PER3 tightly linked with circadian diurnal preference and morningness-eveningness tendencies.
Missense variant P415A in PER3 associated with familial advanced sleep phase syndrome and circadian phase preference.
Associated with individual variability in circadian phase and diurnal preference (extreme morningness vs eveningness chronotypes).
Promoter/intronic variant of PER3 tagging circadian phase angle, diurnal preference, and homeostatic sleep pressure response to sleep loss.
This promoter region variant is associated with individual differences in diurnal preference and sleep timing.