HBB rs267608483: Understanding Rare Hemoglobin Variants
The rs267608483 variant is a rare genetic change located within the HBB gene, which provides instructions for making the beta-globin protein. This variant is associated with potential alterations in hemoglobin function and oxygen transport, often studied in the context of hemoglobinopathies.
What each genotype means
Typical hemoglobin gene profile
This genotype represents the common, non-variant sequence at this position in the HBB gene. Individuals with this result do not carry the specific rare mutation associated with altered hemoglobin function at this site. Please consult with a healthcare provider if you have concerns regarding hemoglobin-related health conditions.
This is the most common genotype observed across all global populations.
Carrier of rare variant
This genotype indicates you carry one copy of the rare variant rs267608483. Research into this specific rare mutation is limited, but it is categorized as a variant that may be associated with hemoglobinopathies or altered oxygen transport. You should discuss these results with a genetic counselor or physician to understand the clinical relevance for your health.
This genotype is extremely rare and is not typically found in the general population.
Rare variant homozygous
This genotype indicates you carry two copies of the rare variant rs267608483. Because this variant is associated with potential impacts on hemoglobin function, individuals with this result may have a higher likelihood of clinical manifestations related to hemoglobinopathies. It is essential to discuss these findings with a medical professional or hematologist for appropriate clinical evaluation.
This genotype is exceptionally rare and has not been widely documented in population-scale genomic databases.
What is rs267608483 and Where is it Located?
The variant rs267608483 is a specific change in the DNA sequence of the HBB gene. In genomics, an rsID (reference SNP cluster ID) acts as a unique identifier for a specific location in the human genome. The HBB gene is situated on chromosome 11 and is responsible for encoding the beta-globin subunit of hemoglobin. Hemoglobin is the essential protein in red blood cells that carries oxygen from the lungs to the rest of the body. Because rs267608483 is classified as a rare variant, it is not found in the vast majority of the human population. Geneticists track such variants to understand how even minor changes in the DNA code can influence the structure or production of proteins, potentially impacting physiological processes like oxygen delivery.
The Role of the HBB Gene
The HBB gene is fundamental to human health because it provides the blueprint for beta-globin. Hemoglobin is a complex molecule typically composed of two alpha-globin subunits and two beta-globin subunits. When the HBB gene functions normally, it ensures that the body produces enough high-quality beta-globin to form stable hemoglobin. If a variant in the HBB gene disrupts this process, it can lead to a group of conditions known as hemoglobinopathies. These conditions range from mild to severe, depending on how the variant affects the protein's ability to bind or release oxygen. Some variants may reduce the amount of beta-globin produced, while others might alter the protein's shape, causing red blood cells to become unstable or misshapen. Understanding the HBB gene is critical for diagnosing and managing blood-related disorders.
Research Associations and Evidence Strength
Research into HBB variants like rs267608483 is primarily focused on their clinical impact on hemoglobin function. Current evidence for this specific variant is categorized as moderate, meaning that while there is a documented association with altered oxygen transport and hemoglobinopathies, ongoing research is required to fully characterize its clinical significance across diverse populations. Many HBB variants are studied because they cause conditions like beta-thalassemia, where the body produces insufficient hemoglobin, or sickle cell disease, where the hemoglobin structure is altered. Because rs267608483 is rare, clinical data is limited compared to more common variants. It is important to note that the presence of a variant does not automatically imply a specific health outcome; clinical interpretation often requires a comprehensive review of a person's medical history, family background, and other genetic factors.
Population Frequency and Interpretation
The rs267608483 variant is considered rare across global populations. In genomics, rarity is a key indicator that a variant may have been subject to evolutionary pressure or simply has not reached high frequency in the general gene pool. Because it is rare, it is not typically included in standard, broad-spectrum genetic screening panels. When a rare variant is identified, it is often through targeted clinical testing for individuals experiencing symptoms related to anemia or other blood disorders. It is essential to understand that having a rare variant does not necessarily mean an individual will develop a disease. Genetic expression is complex, and many factors, including environmental influences and other genetic modifiers, play a role in how a variant manifests. Always consult with a healthcare professional or a genetic counselor to interpret specific genetic findings.
What You Can and Cannot Do With This Information
Information about genetic variants like rs267608483 is intended for educational purposes and should not be used for self-diagnosis or medical decision-making. If you have received a report mentioning this variant, it is important to discuss the findings with a qualified clinician or a genetic counselor. They can provide context based on your personal health history and determine if further diagnostic testing is necessary. You cannot use this information to predict your health future with certainty, nor should you use it to alter any prescribed medications or treatments without professional guidance. Genetic data is only one piece of a much larger health puzzle. By working with medical professionals, you can ensure that any genetic information is interpreted accurately and used to support your overall health and well-being.
How common is this variant?
The rs267608483 variant is classified as rare, with a very low frequency observed across global population databases.
Frequently asked questions
What is the HBB gene?
The HBB gene provides instructions for making beta-globin, a protein that is a key component of hemoglobin. Hemoglobin is the protein in red blood cells that carries oxygen throughout the body.
What are hemoglobinopathies?
Hemoglobinopathies are a group of inherited disorders that affect the structure or production of hemoglobin. These conditions can lead to issues with oxygen transport and red blood cell health.
Should I be worried if I have a rare HBB variant?
Finding a rare variant does not automatically mean you have a health condition. You should discuss any genetic findings with a doctor or genetic counselor who can interpret the results in the context of your overall health.
How is this variant tested?
This variant is typically identified through specialized genetic testing, such as sequencing of the HBB gene. It is not usually included in standard, direct-to-consumer ancestry or wellness tests.
Can I change my genotype?
No, your genotype is determined at conception and cannot be changed. However, understanding your genetic makeup can help you and your healthcare provider make informed decisions about your health.
Sources & further reading
Educational information only, last refreshed 10/3/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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This variant is a pathogenic mutation in the HBB gene associated with beta-thalassemia.
This variant is a pathogenic mutation in the HBB gene associated with hemoglobinopathies such as sickle cell disease.
This variant (c.20A>T, p.Glu7Val) causes the substitution of valine for glutamic acid in the beta-globin chain, leading to sickle cell trait or disease depending on zygosity.
Pathogenic variant (p.Glu6Val, HbS-Antilles) in HBB associated with sickle cell disease-like pathology.
Pathogenic nonsense mutation (c.118C>T / p.Gln40Ter / codon 39 nonsense) causing beta-zero thalassemia and classic carrier status (beta-thalassemia minor).
This variant, known as Hb C-Harlem, involves a double mutation in the HBB gene that can lead to sickle-beta-thalassemia-like phenotypes.