KLRG1 rs11494758: Sleep Health Genetics Explained
The genetic variant rs11494758 is an intronic single nucleotide polymorphism located in the KLRG1 gene on human chromosome 12. Large-scale genome-wide association studies have identified this locus as a novel region statistically linked to composite dimensions of sleep health. Because research directly connecting this specific variant to sleep phenotypes remains limited, it is considered an exploratory trait marker rather than a diagnostic indicator.
What each genotype means
Typical sleep health profile
This genotype represents the most common genetic configuration at this location in the KLRG1 gene. Research indicates this variant is associated with multidimensional sleep health components, though the specific functional impact of this genotype remains limited and requires further study.
This is a common genotype found in a significant portion of global populations.
Varied sleep health association
Carrying one copy of the T allele at this locus has been identified in genome-wide association studies as a potential marker linked to variations in sleep health. Because the evidence for this association is currently limited, this genotype should not be used to predict specific sleep outcomes or health conditions.
This heterozygous genotype is observed frequently across diverse global populations.
Varied sleep health association
Carrying two copies of the T allele at this locus is associated with the same sleep health research signals as the heterozygous genotype. Current scientific evidence is limited, and it is not known how this specific genotype influences individual sleep quality or patterns in a clinical context.
This genotype is present in a notable percentage of the population, consistent with the reported minor allele frequency of 0.20 to 0.30.
Genomic Location and Variant Classification
The single nucleotide polymorphism rs11494758 is situated within an intron of the KLRG1 gene on the short arm of chromosome 12. Because it falls in a non-coding intronic region, it does not alter the primary amino acid sequence of the resulting protein. Instead, bioinformatic and genomic annotations classify rs11494758 as a putative regulatory variant that may influence transcriptional activity, alternative splicing, or chromatin accessibility. In genetic databases such as dbSNP, it is identified as a biallelic substitution involving cytosine and thymine alleles. Rather than acting as a high-penetrance mutation that directly causes disease, variants of this type generally exert subtle modulatory effects on gene expression. Researchers studying complex human traits monitor such intronic markers to trace how non-coding regulatory variation can correlate with physiological variations across diverse populations.
Biological Role of the KLRG1 Gene
The KLRG1 gene encodes killer cell lectin-like receptor subfamily G member 1, a cell-surface transmembrane glycoprotein prominently expressed on natural killer (NK) cells and effector or memory T lymphocytes. In the human immune system, KLRG1 functions primarily as an inhibitory receptor that binds to classical cadherins, transmitting signals that temper lymphocyte cytotoxicity and cytokine production. Because of its selective expression on highly differentiated, antigen-experienced lymphocytes, it is frequently evaluated in immunology as a marker of cellular senescence or immune exhaustion. The emergence of KLRG1 in genetic association studies of sleep points toward the complex bidirectional crosstalk between systemic immune regulation, inflammatory signaling cascades, and central sleep-wake regulation, although functional bench science is required to pinpoint the precise neuro-immune mechanism involved.
Sleep Health Associations and Current Evidence
Evidence linking rs11494758 to human physiology stems from large-scale genome-wide association studies evaluating multidimensional sleep health. In an analysis of over 400,000 individuals, rs11494758 emerged as a novel lead locus associated with principal components of composite sleep scores, which integrate parameters such as sleep duration, chronotype, daytime sleepiness, and insomnia symptoms. The strength of this evidence is currently categorized as limited because it is derived primarily from biobank-scale discovery cohorts and statistical principal components rather than replicated clinical trials. While the statistical association reaches standard thresholds in published analyses, the individual effect size is modest, as is standard for complex behavioral phenotypes. Clinically, it does not diagnose insomnia, sleep apnea, or any specific circadian disorder, serving instead as a hypothesis-generating marker of biological architecture.
Interpretation and Practical Considerations
Finding your genotype for rs11494758 provides scientific insight into personal variation within an immune-related genomic locus, but it carries no direct clinical utility on its own. Possessing an allele associated with slightly altered composite sleep scores does not predict chronic sleep disruption, nor does an alternative allele guarantee restorative sleep. Everyday sleep architecture is heavily governed by sleep hygiene, circadian cues, lifestyle factors, stress levels, and underlying environmental exposures. Consumers should not alter medical treatments, initiate sleep medications, or adjust pharmaceutical therapies based on non-coding trait markers like rs11494758. Anyone experiencing daytime drowsiness, persistent insomnia, or unrefreshing sleep should consult a healthcare provider or a board-certified sleep specialist for comprehensive clinical evaluation.
How common is this variant?
The rs11494758 variant is common across human populations, with an estimated minor allele frequency (MAF) ranging roughly between 0.20 and 0.30 in global reference datasets.
Frequently asked questions
Can rs11494758 diagnose a sleep disorder like insomnia or sleep apnea?
No, rs11494758 cannot diagnose any sleep disorder. It is an intronic marker identified in research cohorts through statistical correlations with composite sleep health traits. Clinical conditions such as insomnia and sleep apnea require formal diagnostic evaluation by a medical professional.
Why is an immune system gene like KLRG1 linked to sleep?
KLRG1 plays an established role in natural killer and T-cell signaling, and modern research shows substantial crosstalk between systemic immune function and central sleep regulation. While the exact mechanistic link remains under active investigation, genetic variations in immune pathways are frequently uncovered in large-scale studies of behavioral and metabolic traits.
Does having a specific genotype mean I will suffer from poor sleep?
No, your genotype at this locus does not determine your sleep quality. Complex traits like sleep are polygenic and predominantly shaped by environmental habits, stress, light exposure, and overall health. The statistical effect of this single variant on daily rest is extremely subtle.
Should I make changes to medications or sleep aids based on rs11494758?
You should never adjust prescription medications, over-the-counter sleep aids, or clinical therapies based on rs11494758 results. This marker does not provide pharmacogenomic dosing guidance. Any questions regarding sleep aids or sleep management should be discussed directly with a qualified doctor or pharmacist.
Sources & further reading
Educational information only, last refreshed 9/7/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs11494758?
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 — $29