SH2B1 rs7498665: Understanding Your Genetic Variant
The rs7498665 variant is a single-nucleotide polymorphism located within the SH2B1 gene. It has been statistically associated with variations in body mass index and energy balance signaling in human populations.
What each genotype means
Increased obesity risk profile
This genotype is associated with an increased risk of obesity and higher body mass index (BMI) in various studies. Research suggests this variant may influence leptin-melanocortin signaling, which plays a role in energy balance and weight regulation. These findings are based on statistical associations in population studies and do not constitute a medical diagnosis.
The A allele is common, with frequencies around 0.40 in European populations and 0.60 in East Asian populations, making this genotype frequently observed.
Intermediate obesity risk profile
Carrying one copy of the risk-associated allele is linked to a modest increase in obesity risk and BMI compared to those without the risk allele. The SH2B1 gene is involved in metabolic regulation, and this variant may subtly affect how the body manages energy balance. Lifestyle and behavioral factors are known to significantly modulate the impact of this genetic association.
This heterozygous genotype is common across many populations, reflecting the high prevalence of both the A and G alleles.
Baseline obesity risk profile
This genotype represents the absence of the specific risk-associated allele identified in studies of the SH2B1 gene. Individuals with this profile do not carry the variant linked to the increased obesity risk observed in the A-allele carriers. As with all genetic traits, overall health and body weight are influenced by a complex interplay of many genetic factors and environmental influences.
This genotype is common, occurring in a significant portion of the population depending on the specific ancestral background.
What is rs7498665?
The variant rs7498665 is a single-nucleotide polymorphism (SNP) located within the SH2B1 gene. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant involves a change between the nucleotides adenine (A) and guanine (G). Researchers track such variants to understand how subtle differences in our genetic code might correlate with physical traits or health outcomes. Because this variant is located in a region of the genome associated with metabolic regulation, it has been the subject of various genome-wide association studies (GWAS) aimed at identifying the genetic architecture of body weight and energy balance.
The Role of the SH2B1 Gene
The SH2B1 gene encodes the Src homology 2 B adaptor protein 1. This protein acts as a critical signaling molecule that helps cells respond to various hormones and growth factors, including leptin, insulin, and nerve growth factor. Leptin is a hormone that plays a key role in regulating energy intake and expenditure, essentially signaling to the brain when the body has sufficient energy stores. By facilitating these signaling pathways, SH2B1 helps maintain glucose homeostasis and healthy body weight. Research in animal models has shown that the deletion of this gene can lead to obesity and insulin resistance, highlighting its importance in metabolic health.
Research and Evidence Strength
Scientific research has identified a statistical association between rs7498665 and traits related to body mass index (BMI). Some studies have observed that the risk allele is associated with a modest increase in BMI, with some reports suggesting an approximate 11% increase in obesity risk per allele. However, the evidence strength for this specific SNP is considered limited. While large-scale studies have identified these correlations, the effect size of any single SNP on complex traits like body weight is typically very small. It is important to note that obesity and metabolic health are influenced by a complex interplay of thousands of genetic variants, environmental factors, and lifestyle choices, rather than a single genetic marker.
Population Frequency
The frequency of the alleles for rs7498665 varies significantly across different ancestral groups. In European populations, the A allele frequency is approximately 0.40, while in East Asian populations, it is observed at a higher frequency of approximately 0.60. These differences illustrate how genetic variation is distributed unevenly across the globe due to historical migration and evolutionary pressures. Understanding these frequencies is essential for researchers when interpreting the results of genetic studies, as a variant that is common in one population may be rare in another, potentially influencing the observed associations with specific health traits.
Interpreting Your Information
Information about your genotype for rs7498665 should be viewed as a small piece of a much larger biological puzzle. Because the association between this variant and metabolic traits is modest and influenced by many other factors, it cannot be used to predict individual health outcomes or diagnose conditions. Genetic testing results for such variants are for educational purposes and do not provide medical advice. If you have concerns about your weight, metabolic health, or family history, the most effective approach is to consult with a healthcare professional. They can provide personalized guidance based on your clinical history, physical examinations, and established medical standards, rather than relying on individual genetic markers.
How common is this variant?
The A allele frequency is approximately 0.40 in European populations and 0.60 in East Asian populations.
Frequently asked questions
Does having the rs7498665 variant mean I will be obese?
No. Genetic variants like rs7498665 only contribute a very small amount to the overall risk of complex traits like body weight. Lifestyle, diet, and many other genetic and environmental factors play a much larger role in determining health outcomes.
Can I use this information to change my diet?
Genetic information regarding this SNP is not specific enough to provide personalized dietary recommendations. You should consult with a registered dietitian or your primary care physician for advice tailored to your specific health needs.
Is this variant a diagnostic test for metabolic disease?
No, this variant is not used for clinical diagnosis. Metabolic diseases are complex and are diagnosed by doctors using clinical measurements like blood tests, physical exams, and medical history.
Where can I find more information about SH2B1?
You can explore resources like MedlinePlus Genetics or the NCBI Gene database for comprehensive information on the function of the SH2B1 gene. These resources provide detailed scientific summaries for a general audience.
Sources & further reading
Educational information only, last refreshed 9/26/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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