SLC2A10 rs864309481: Understanding Carrier Status
The rs864309481 variant is a genetic change located in the SLC2A10 gene. It is associated with carrier status for arterial tortuosity syndrome, a rare, inherited connective tissue disorder.
What each genotype means
Typical genetic profile
This genotype represents the common, non-pathogenic sequence for this region of the SLC2A10 gene. It is not associated with arterial tortuosity syndrome.
This is the most common genotype found in the general population.
Carrier of arterial tortuosity mutation
This genotype indicates you are a carrier of a pathogenic deletion variant in the SLC2A10 gene. Arterial tortuosity syndrome is an autosomal recessive condition, meaning that typically only individuals who inherit two copies of a pathogenic mutation (one from each parent) are at risk for the disorder; carriers generally do not show vascular anomalies.
This specific deletion is rare in the general population.
What is the rs864309481 Variant?
The rs864309481 variant is a specific genetic alteration found on chromosome 20. In scientific literature, this variant is often described as a deletion of four nucleotides, specifically represented as a 'CTAA' deletion. Because it involves the loss of genetic material, it is categorized as a structural variant rather than a simple single-nucleotide substitution. This variant sits within the SLC2A10 gene, which provides the blueprint for the GLUT10 protein. Genetic variants like this are identified through high-throughput sequencing technologies that compare an individual's DNA sequence against a standard reference genome. When a deletion occurs in a gene, it can potentially disrupt the production or function of the protein that the gene encodes. Understanding the location and nature of this variant is the first step in determining how it might influence biological processes within the body.
The Role of the SLC2A10 Gene
The SLC2A10 gene is responsible for producing the GLUT10 protein, which belongs to a family of facilitative glucose transporters. While its name suggests a role in sugar transport, research indicates that GLUT10 is also essential for the transport of ascorbate, a form of vitamin C that acts as a critical cofactor in the synthesis of collagen and elastin. Collagen and elastin are the primary structural components of connective tissues, including the walls of our arteries. When the SLC2A10 gene is mutated, the resulting deficiency in functional GLUT10 protein can lead to weakened arterial walls. This structural weakness is thought to trigger an overactive TGF-beta signaling pathway, which promotes excessive growth and elongation of blood vessels. This process is the underlying mechanism for the vascular abnormalities observed in conditions like arterial tortuosity syndrome.
Research and Clinical Associations
Scientific research has established a strong link between mutations in the SLC2A10 gene and arterial tortuosity syndrome (ATS). ATS is a rare, autosomal recessive disorder characterized by the abnormal twisting, elongation, and narrowing of major arteries. Because it is an autosomal recessive condition, an individual must typically inherit two copies of a pathogenic mutation—one from each parent—to manifest the symptoms of the syndrome. The rs864309481 variant is recognized in clinical databases as a pathogenic mutation associated with this condition. Evidence for this association is considered moderate to strong in the context of clinical genetics, as it directly impacts the integrity of the GLUT10 protein. However, it is important to note that being a 'carrier'—having only one copy of the variant—typically does not result in the clinical symptoms of the syndrome, as the remaining functional copy of the gene is usually sufficient for normal physiological function.
Population Frequency and Interpretation
The rs864309481 variant is classified as rare across global populations. In genetic studies, rare variants are those that appear at a very low frequency in the general population, often making them difficult to track without large-scale genomic databases. Because the variant is rare, the likelihood of an individual carrying this specific mutation is low. When interpreting genetic reports, it is vital to distinguish between being a carrier and having the condition itself. Carrier status means you possess one copy of the variant, which generally does not cause health issues. However, if both parents are carriers, there is a statistical possibility of passing the condition to their children. This information is primarily used for family planning and understanding hereditary risks. If you have concerns about your carrier status or family history, the most appropriate step is to consult with a certified genetic counselor or a medical professional who can provide context based on your specific health history.
How common is this variant?
The rs864309481 variant is considered rare in the general population, with its specific frequency varying by ancestry but remaining low across all groups.
Frequently asked questions
What does it mean to be a carrier of a genetic variant?
Being a carrier means you have one copy of a gene mutation that is associated with a recessive condition. Carriers usually do not experience symptoms of the condition themselves because they have a second, functional copy of the gene.
Is arterial tortuosity syndrome common?
No, arterial tortuosity syndrome is a very rare genetic disorder. Only about 100 cases have been documented in medical literature to date.
Should I be worried if I am a carrier for this variant?
Carrier status for a recessive condition is generally not a cause for personal health concern. However, it is useful information for family planning, and you may wish to discuss it with a genetic counselor.
How is this variant detected?
This variant is typically identified through clinical molecular genetic testing, such as sequencing of the SLC2A10 gene. These tests are usually ordered by a physician when there is a clinical suspicion of a connective tissue disorder.
Sources & further reading
Educational information only, last refreshed 9/28/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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