MYH7 rs116634731: What Your Genotype Means
The rs116634731 variant is a specific genetic change located within the MYH7 gene. It has been identified in research contexts as a potential factor associated with hypertrophic cardiomyopathy, a condition affecting the heart muscle.
What each genotype means
Typical MYH7 genetic profile
This genotype represents the most common sequence found in the general population for this specific location in the MYH7 gene. It does not carry the specific variant associated with the rare contractile protein changes linked to hypertrophic cardiomyopathy in clinical studies. This result is considered the standard or reference sequence.
This is the most common genotype observed across all global populations.
Rare MYH7 variant carrier
This genotype indicates the presence of a rare missense variant in the MYH7 gene, which has been observed in clinical testing datasets. Research suggests that variants in this gene can be associated with hypertrophic cardiomyopathy, though the evidence for this specific variant remains limited. You should discuss these findings with a cardiologist or genetic counselor to understand their clinical relevance to your personal health history.
This genotype is extremely rare and is primarily observed in clinical testing datasets rather than the general population.
Rare MYH7 variant homozygous
This genotype indicates that both copies of the MYH7 gene carry this rare missense variant. Because this variant is associated with potential changes in contractile protein function, it is important to consult with a medical professional or genetic specialist. Clinical interpretation of homozygous rare variants is complex and requires professional evaluation in the context of your overall health.
This genotype is exceptionally rare and has not been established as a common occurrence in any known population.
Understanding the Variant and Its Location
The rs116634731 variant is a single nucleotide polymorphism (SNP) situated within the MYH7 gene. In genetics, a SNP represents a variation at a single position in the DNA sequence. This specific variant is classified as a missense variant, meaning the change in the DNA code results in a different amino acid being incorporated into the protein structure. The MYH7 gene provides instructions for making a protein called beta-myosin heavy chain, which is a critical component of the sarcomere, the basic unit of muscle contraction. Because this variant alters the sequence of this protein, researchers investigate whether it impacts the structural integrity or the functional efficiency of the heart muscle fibers. Understanding the precise location of such variants is a primary step in determining how they might influence biological processes.
The Role of the MYH7 Gene
The MYH7 gene is essential for the proper function of cardiac and skeletal muscles. It encodes the beta-myosin heavy chain, a motor protein that works in tandem with other proteins to facilitate muscle contraction. In the heart, this protein is a major component of the thick filaments in the sarcomere. When the heart beats, these filaments slide past each other to shorten the muscle cell, effectively pumping blood throughout the body. Because of its central role in cardiac mechanics, mutations or variants in MYH7 can have significant consequences. Research has established that various alterations in this gene are linked to several heart conditions, including hypertrophic cardiomyopathy, where the heart muscle walls become abnormally thick, and dilated cardiomyopathy, where the heart chambers enlarge and weaken.
Research Associations and Evidence Strength
Current research into rs116634731 suggests an association with hypertrophic cardiomyopathy, though the evidence strength is currently considered limited. In the field of genomics, 'limited' evidence often means that while the variant has been observed in individuals with the condition, there is not yet enough robust, large-scale clinical data to definitively categorize it as a primary cause of the disease. Many missense variants in MYH7 are studied for their potential to disrupt protein stability or force generation, but distinguishing between benign variations and those that cause disease is a complex, ongoing process. Because of this, clinical laboratories often classify such variants as having uncertain significance until further family studies or functional assays can confirm their impact on heart health.
Population Frequency and Clinical Context
The rs116634731 variant is extremely rare in the general population. It is primarily observed in specialized clinical testing datasets, which are often composed of individuals who have already undergone genetic screening due to a personal or family history of heart disease. Because it is not a common variant found in the general public, there is very little data regarding its frequency across different ancestral groups. When a variant is this rare, it is difficult for researchers to perform the large-scale statistical analyses needed to confirm its clinical impact. Consequently, the presence of this variant in a genetic report does not automatically imply a diagnosis of heart disease, as many rare variants are found in healthy individuals as well.
What You Can and Cannot Do With This Information
Genetic information regarding variants like rs116634731 should be interpreted with caution and professional guidance. You cannot use this information to diagnose yourself or family members with a heart condition. Genetic testing results are only one piece of a much larger clinical puzzle that includes physical exams, imaging like echocardiograms, and family medical history. If you have received a report mentioning this variant, the most important step is to discuss the findings with a healthcare provider, such as a cardiologist or a genetic counselor. They can help place the result in the context of your overall health and determine if any further clinical monitoring is necessary. Never make changes to your health management or medication based solely on a genetic report without consulting your medical team.
How common is this variant?
The rs116634731 variant is extremely rare and is observed primarily in clinical testing datasets rather than the general population.
Frequently asked questions
Is rs116634731 a guaranteed cause of heart disease?
No. Having a specific genetic variant does not guarantee that you will develop a condition. Many factors, including other genes and environmental influences, contribute to heart health.
What should I do if my genetic report shows this variant?
You should share the report with your doctor or a genetic counselor. They can evaluate the result in the context of your personal and family medical history.
Why is the evidence for this variant considered limited?
Evidence is considered limited when there is not enough published research or clinical data to definitively link the variant to a specific disease outcome. This is common for very rare genetic variants.
Can I use this information to change my medication?
No. You should never change your medication or treatment plan based on genetic findings without consulting your physician or pharmacist.
Sources & further reading
Educational information only, last refreshed 10/4/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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This variant is a pathogenic mutation in the MYH7 gene associated with hypertrophic cardiomyopathy.
This variant is a pathogenic mutation in the MYH7 gene associated with hypertrophic cardiomyopathy.
This variant is a pathogenic mutation in the MYH7 gene associated with hypertrophic cardiomyopathy.
Sarcomeric beta-myosin heavy chain missense mutation p.Arg403Gln predisposing to familial hypertrophic cardiomyopathy with high penetrance and variable clinical severity.
A well-characterized pathogenic missense substitution (p.Arg403Gln) causing familial hypertrophic cardiomyopathy with elevated risk of arrhythmia and sudden cardiac death.
This coding variant in MYH7 has been cataloged in ClinVar and curated for its association with genetic predisposition to familial hypertrophic cardiomyopathy.