SMAD3 rs17228058: Understanding Allergy Susceptibility Associations
The rs17228058 variant is a single nucleotide polymorphism located within the SMAD3 gene. It has been identified in genome-wide association studies as being statistically linked to self-reported allergy susceptibility.
What each genotype means
Typical allergy risk profile
This genotype represents the common version of the SMAD3 variant. Research indicates that individuals with this genotype do not carry the specific allele associated with increased self-reported allergy susceptibility in certain genome-wide association studies. This finding is based on limited evidence and should not be used to predict personal health outcomes.
This is the most common genotype observed in most global populations.
Slightly altered allergy susceptibility
This genotype includes one copy of the allele associated with self-reported allergy susceptibility in large-scale genetic studies. The clinical significance of this association is considered limited, and it does not imply a diagnosis of any allergic condition. Please consult with a healthcare professional if you have concerns regarding your immune health or allergy symptoms.
Carried by a significant portion of the population, consistent with a minor allele frequency of approximately 0.1088.
Increased allergy susceptibility marker
This genotype carries two copies of the allele linked to self-reported allergy susceptibility in published meta-analyses. While this variant is statistically associated with the trait, the evidence remains limited and the biological mechanism is not fully understood. This result is for informational purposes and does not constitute a medical diagnosis.
This genotype is less common than the A/A or A/G genotypes, occurring at a frequency consistent with the reported minor allele frequency.
What is rs17228058?
The variant rs17228058 is a single nucleotide polymorphism (SNP) located on chromosome 15 at position 67,157,967 (GRCh38). In the context of human genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant is situated within the SMAD3 gene, which provides instructions for making a protein that plays a critical role in cellular communication. Researchers track these variants to understand how subtle differences in our genetic code might contribute to complex traits or disease risks. Because this variant is located in a non-coding or regulatory region of the gene, it is often studied to see if it influences how much SMAD3 protein is produced or when it is activated in specific tissues, rather than changing the structure of the protein itself.
The Role of the SMAD3 Gene
The SMAD3 gene encodes a protein that is a key component of the transforming growth factor-beta (TGF-beta) signaling pathway. This pathway is essential for regulating various cellular processes, including cell growth, differentiation, and apoptosis. By transmitting signals from the cell surface to the nucleus, the SMAD3 protein acts as a transcription factor, helping to turn specific genes on or off. Beyond its role in general cellular health, SMAD3 is also recognized as a tumor suppressor. Mutations in this gene are well-documented in clinical literature for their association with connective tissue disorders, such as Loeys-Dietz syndrome and aneurysms-osteoarthritis syndrome. Given its broad influence on immune regulation and tissue maintenance, researchers investigate variants in this gene to determine if they contribute to the underlying biological mechanisms of inflammatory conditions and allergic responses.
Evidence and Allergy Associations
The association between rs17228058 and self-reported allergy was highlighted in large-scale genome-wide association meta-analyses. These studies look for correlations between specific genetic markers and reported health traits across thousands of participants. While the statistical evidence for this association is significant in the context of these studies, the overall evidence strength remains limited. This means that while the variant is a marker of interest, it is not considered a definitive diagnostic tool for predicting whether an individual will develop allergies. Allergic conditions are highly complex, influenced by a combination of numerous genetic factors, environmental exposures, and lifestyle variables. Consequently, the presence of this variant does not guarantee the development of allergies, nor does its absence provide immunity. It serves as one piece of a much larger, ongoing puzzle in understanding the genetic architecture of immune system sensitivity.
What You Can and Cannot Do With This Information
Genetic information regarding variants like rs17228058 is primarily intended for educational and research purposes. It is important to understand that this data cannot be used to diagnose an allergy or predict specific clinical outcomes. Because the association is based on population-level statistics, it does not provide a personalized medical assessment. If you have concerns about allergies, symptoms, or your immune health, the most appropriate course of action is to consult with a qualified healthcare professional or an allergist. They can perform clinical evaluations, such as skin prick tests or blood tests, which are the standard for diagnosing allergic conditions. Do not use genetic reports to make decisions about medications or lifestyle changes without first discussing them with your clinician, as they can provide guidance based on your full medical history and current health status.
How common is this variant?
The Global Minor Allele Frequency (GMAF) for the G allele of rs17228058 is approximately 0.1088, indicating that it is a relatively common variant across diverse populations.
Frequently asked questions
Does having the G allele mean I will have allergies?
No, having the G allele does not mean you will develop allergies. Genetic associations are based on statistical trends in large groups and cannot predict individual health outcomes.
Is rs17228058 a diagnostic test for allergies?
No, this variant is not used for clinical diagnosis. Allergies are diagnosed by healthcare providers through physical exams and clinical testing, not by looking at a single genetic marker.
What is the SMAD3 gene responsible for?
The SMAD3 gene provides instructions for a protein involved in the TGF-beta signaling pathway, which regulates cell growth and immune system communication.
Where can I find more information about this SNP?
You can find technical data on this variant through public databases like the GWAS Catalog, dbSNP, and SNPedia, which aggregate research findings from scientific studies.
Sources & further reading
Educational information only, last refreshed 9/20/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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This variant in the SMAD3 gene is associated with an increased risk of asthma and various allergic conditions, particularly in female children, through the disruption of TGF-beta signaling.
This common variant in the SMAD3 gene is associated with an increased risk of bronchial asthma specifically in girls.