ENG rs10121110: Understanding This Genetic Variant
The rs10121110 variant is located within the ENG gene, which provides instructions for making the endoglin protein. This gene is primarily associated with hereditary hemorrhagic telangiectasia (HHT), a condition characterized by abnormal blood vessel development.
What each genotype means
Typical ENG gene profile
This genotype represents the most common sequence found in the ENG gene. It does not indicate the presence of the specific pathogenic mutations associated with Hereditary Hemorrhagic Telangiectasia (HHT) type 1 described in clinical literature.
This is the most common genotype observed in the general population.
Potential carrier status
This genotype indicates that one copy of the ENG gene carries a variation. Because HHT is an autosomal dominant condition, individuals with certain pathogenic variants in ENG may be at risk for vascular dysplasia; however, this specific rsID is not a standard diagnostic marker for HHT. Please consult with a genetic counselor or physician to interpret this result in the context of your personal and family health history.
The frequency of this specific heterozygous genotype is not well-documented in large-scale population databases.
Variant genotype
This genotype indicates that both copies of the gene carry this variation. The clinical significance of this homozygous state for this specific variant is not clearly established in current medical research. You should discuss this finding with a healthcare provider to determine if further clinical evaluation is necessary.
This genotype is rare in the general population.
What is the rs10121110 Variant?
The rs10121110 variant is a specific change in the DNA sequence located within the ENG gene. In genomics, a single nucleotide polymorphism (SNP) like rs10121110 represents a variation at a single position in the genome. This variant sits within the regulatory or coding regions of the ENG gene, which is situated on chromosome 9. Scientists track these variants to understand how specific DNA changes might influence biological processes or contribute to inherited conditions. While many variants in the human genome are neutral and have no impact on health, others are studied for their potential to alter protein structure or gene expression. The rs10121110 variant is cataloged in public databases to help researchers correlate genetic data with clinical observations, though its specific functional impact requires ongoing investigation to fully characterize.
The Role of the ENG Gene
The ENG gene encodes a protein called endoglin, which is a critical component of the transforming growth factor-beta (TGF-beta) receptor complex. This protein is primarily expressed in the endothelial cells that line the interior surface of blood vessels. Endoglin plays a vital role in angiogenesis, the process by which new blood vessels form from pre-existing ones, and helps maintain the structural integrity of the vascular system. Because of its function in vascular development, the ENG gene is essential for proper blood flow and vessel stability throughout the body. When the ENG gene is altered by certain pathogenic mutations, it can lead to hereditary hemorrhagic telangiectasia type 1 (HHT1). This condition is a multisystemic vascular dysplasia that can cause fragile blood vessels, leading to symptoms like frequent nosebleeds and the formation of arteriovenous malformations in organs such as the lungs, liver, and brain.
Research and Evidence Strength
The association between the ENG gene and hereditary hemorrhagic telangiectasia is well-established in medical literature. However, the evidence strength for specific variants like rs10121110 can vary. While the ENG gene is a primary driver of HHT1, not every variant found within the gene is necessarily pathogenic. Research into rs10121110 is ongoing, and it is categorized as having moderate evidence in some clinical contexts. It is important to distinguish between variants that directly cause disease and those that are simply markers or have uncertain significance. Clinical genetic testing often identifies many variants, and scientists must perform functional studies to determine if a specific change disrupts the endoglin protein's ability to function. Currently, the scientific community continues to gather data to clarify the clinical relevance of this specific SNP, and individuals should rely on professional genetic counseling to interpret what such findings mean for their personal health.
What You Can Do With This Information
Genetic information can be complex, and it is important to approach it with the guidance of a qualified healthcare professional. If you have received a report mentioning the rs10121110 variant, remember that a genetic finding is not a medical diagnosis. Many factors, including other genes and environmental influences, contribute to overall health. You cannot use this information to diagnose yourself or others. If you are concerned about a family history of vascular issues or HHT, the most effective step is to consult with a genetic counselor or a physician who specializes in medical genetics. They can help you understand the context of your results, discuss whether further clinical testing is appropriate, and provide personalized information based on your specific health history. Avoid making medical decisions based solely on raw genetic data without professional clinical interpretation.
How common is this variant?
Specific population frequency data for rs10121110 is not widely documented in major public catalogs. Frequency can vary significantly across different ancestral groups.
Frequently asked questions
Is rs10121110 a cause of HHT?
The ENG gene is associated with HHT, but not all variants within the gene are pathogenic. You should consult a genetic counselor to determine if this specific variant is considered clinically significant.
Where can I find more information on the ENG gene?
You can visit MedlinePlus Genetics or the NCBI Gene database for comprehensive, government-verified information on the function and clinical associations of the ENG gene.
Should I be worried if I have this variant?
Most genetic variants are neutral and do not cause disease. A genetic finding is not a diagnosis, and you should discuss any concerns with a healthcare provider who can review your full clinical picture.
How is HHT diagnosed?
HHT is typically diagnosed based on clinical criteria, such as the Curaçao criteria, which include symptoms like recurrent nosebleeds and telangiectasias. Genetic testing is often used to confirm a diagnosis after clinical evaluation.
Sources & further reading
Educational information only, last refreshed 10/9/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs10121110?
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 ENG
Genetic variant identified in the ENG gene, relevant for clinical screening of vascular disorders.
A known pathogenic mutation in the ENG gene linked to vascular malformations.
Pathogenic variant in the ENG gene associated with hereditary hemorrhagic telangiectasia type 1.
A variant in the ENG gene potentially impacting protein function related to vascular development.
This variant is located within the ENG gene, which is associated with hereditary hemorrhagic telangiectasia.
Clinically significant variant in the ENG gene associated with hereditary hemorrhagic telangiectasia.