TEX15 rs4844649: Understanding This Genetic Variant
The rs4844649 variant is a genetic change located within the TEX15 gene, which plays a critical role in male germ cell development. Research has investigated its potential association with spermatogenic failure, though evidence remains limited and findings vary across different populations.
What each genotype means
Typical spermatogenesis risk profile
You carry two copies of the common C allele in the TEX15 gene. Research indicates this genotype is not associated with an altered statistical risk of meiotic spermatogenic failure or reduced sperm count. Overall spermatogenesis is influenced by many genetic and environmental factors beyond this single variant.
Carried by approximately 90% to 95% of individuals across global populations.
Modestly altered spermatogenic risk
You carry one copy of the minor T allele in TEX15. Limited candidate-gene research suggests this allele may be weakly associated with altered susceptibility to severe oligozoospermia or non-obstructive azoospermia, although findings remain preliminary and do not diagnose infertility. Fertility is a complex trait influenced by numerous genomic loci and lifestyle elements.
Carried by roughly 5% to 10% of people globally, reflecting a minor allele frequency near 2% to 5%.
Possible increased spermatogenic risk
You carry two copies of the rare T allele in TEX15. Preliminary studies suggest a potential statistical association with spermatogenic failure, including severe oligozoospermia, though scientific evidence remains limited and inconclusive. This genotype is not a diagnostic finding of male infertility and should be evaluated in context with comprehensive clinical testing.
Very rare, found in fewer than 1 in 400 individuals across most ancestral populations.
What is rs4844649?
The rs4844649 variant is a single nucleotide polymorphism (SNP) situated within the TEX15 gene on human chromosome 8. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. The TEX15 gene, which stands for Testis-Expressed Gene 15, is primarily active in the testes. Because this variant is located within a gene known for its involvement in reproductive processes, researchers often study it to determine if specific DNA changes correlate with differences in male fertility. It is important to note that the presence of a variant does not automatically imply a health condition; rather, it is a point of variation that scientists track to understand the complex genetic architecture of human traits, including those related to spermatogenesis.
The Role of the TEX15 Gene
The TEX15 gene encodes a protein that is essential for the proper development of sperm cells. Specifically, the TEX15 protein is involved in meiotic recombination and the repair of DNA double-strand breaks, which are vital processes that occur during the formation of sperm. In animal models, the absence of functional TEX15 protein has been shown to lead to infertility, characterized by a failure in the maturation of germ cells. Because of these critical functions, scientists hypothesize that variations in the TEX15 gene could potentially influence the efficiency of sperm production. While rare, severe mutations in this gene have been linked to clinical cases of non-obstructive azoospermia, a condition where the testes produce little to no sperm, highlighting the gene's importance in male reproductive health.
Research and Evidence Strength
The association between common variants like rs4844649 and male infertility is a subject of ongoing scientific inquiry. While some studies have explored whether specific SNPs in TEX15 contribute to susceptibility for conditions like severe oligozoospermia or non-obstructive azoospermia, the evidence is currently considered limited. Genetic association studies often yield mixed results; for instance, a variant found to be significant in one population may not show the same effect in another. Furthermore, many studies in this field are exploratory, and the functional impact of a single SNP like rs4844649 is often difficult to isolate from the rest of an individual's genetic background. Consequently, while the gene itself is clearly important for fertility, the specific contribution of this common variant to clinical infertility remains a topic that requires more robust, large-scale validation.
Population Frequency
The rs4844649 variant is found across various global populations, with a minor allele frequency typically reported in the range of 0.02 to 0.05. This means that the variant is relatively uncommon but present in a significant portion of the general population. Because frequency can vary based on ancestral background, researchers often emphasize the need for diverse study cohorts to understand how these frequencies correlate with health outcomes. The observed frequency of this variant is generally consistent with what is expected for common genetic polymorphisms, and it is not considered a rare mutation that would be exclusively linked to a specific disease state.
Interpreting Genetic Information
It is important to understand that genetic variants are only one piece of a much larger puzzle regarding human health and fertility. If you are curious about your own genetic data, it is essential to recognize that a single SNP result cannot diagnose a medical condition or predict fertility outcomes. Many factors, including environment, lifestyle, and thousands of other genetic markers, influence reproductive health. If you have concerns regarding fertility or reproductive health, the most appropriate step is to consult with a qualified healthcare provider or a reproductive specialist. They can provide context based on your personal medical history and clinical testing, which are far more informative than looking at a single genetic variant in isolation. Always rely on professional medical guidance rather than self-interpretation of genetic data.
How common is this variant?
The minor allele frequency for rs4844649 is approximately 0.02 to 0.05 across global populations, indicating it is a relatively common variant.
Frequently asked questions
Does having the rs4844649 variant mean I am infertile?
No. The presence of this variant does not diagnose infertility. It is a common genetic variation, and most people who carry it do not have reproductive issues.
What is the function of the TEX15 gene?
The TEX15 gene provides instructions for making a protein that is essential for sperm development. It helps repair DNA during the process of meiosis, which is necessary for creating healthy sperm cells.
Should I get tested for this variant?
There is no clinical recommendation to test for this specific variant. Genetic testing for fertility is usually conducted through a doctor if there are specific clinical concerns.
Where can I find more information on male infertility genetics?
You can visit reputable resources like MedlinePlus Genetics or the American Society for Reproductive Medicine. These sites provide evidence-based information on the genetic factors involved in reproductive health.
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 rs4844649?
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 TEX15
Missense polymorphism in TEX15 essential for DNA double-strand break repair during male meiosis, associated with non-obstructive azoospermia and oligospermia.
A functional variant in testis-expressed protein 15 linked to spermatogenic failure and susceptibility to male factor infertility.