rs41524547: Understanding the SCA10 Ancestral Haplotype Marker
The rs41524547 variant is an intergenic single nucleotide polymorphism (SNP) that serves as a robust genetic marker for identifying extended haplotypes associated with spinocerebellar ataxia type 10 (SCA10). It is primarily utilized in population genetics research to trace the ancestral origins of the ATTCT repeat expansion within the ATXN10 gene.
What each genotype means
Ancestral haplotype absent
This genotype does not carry the G allele associated with the specific ancestral haplotype linked to SCA10. It does not provide the genetic marker used for screening SCA10 expansions in population genetics studies.
Frequency varies significantly by ancestry, as this variant is used as a marker for specific population-based SCA10 expansion studies.
Ancestral haplotype carrier
This genotype includes one copy of the G allele, which defines an extended haplotype associated with the ancestral origin of SCA10. This marker is utilized in research to screen for SCA10 expansions within specific populations.
Frequency varies significantly by ancestry, as this variant is used as a marker for specific population-based SCA10 expansion studies.
Ancestral haplotype homozygous
This genotype carries two copies of the G allele, which is the most robust at-risk SNP allele for identifying the ancestral haplotype linked to SCA10. Researchers use this marker to facilitate the screening of SCA10 expansions in population genetics.
Frequency varies significantly by ancestry, as this variant is used as a marker for specific population-based SCA10 expansion studies.
What is rs41524547?
The rs41524547 variant is a single nucleotide polymorphism located in an intergenic region of the human genome. Unlike variants that occur within the coding sequence of a gene, this SNP does not directly alter a protein's structure. Instead, its primary scientific value lies in its role as a genetic marker. Because it is physically linked to the ATXN10 gene on chromosome 22, it is often inherited alongside specific genetic sequences. Researchers use this SNP to define an 'extended haplotype,' which is a set of DNA variations that tend to be inherited together as a block. By tracking this specific haplotype, scientists can better understand the evolutionary history and geographic spread of certain genetic traits, particularly those related to repeat expansion disorders.
Association with SCA10
Spinocerebellar ataxia type 10 (SCA10) is a rare, autosomal dominant neurodegenerative disorder characterized by cerebellar ataxia and seizures. The disease is caused by a massive expansion of an ATTCT pentanucleotide repeat located in the ninth intron of the ATXN10 gene. While the repeat expansion itself is the direct cause of the condition, the rs41524547-G allele has been identified as a robust marker for the ancestral haplotype that carries this expansion. Research suggests that the SCA10 mutation likely originated in an ancestral Amerindian population before spreading into mixed populations in Latin America, such as those in Mexico and Brazil. Consequently, the presence of the G allele at this SNP site is frequently used in population genetics to screen for the lineage associated with these specific repeat expansions.
Evidence and Population Frequency
The evidence linking rs41524547 to the SCA10 ancestral haplotype is considered moderate to strong within the context of population genetics. Studies have consistently shown that the G allele is a reliable indicator of the lineage associated with the ATTCT repeat expansion. However, the frequency of this variant is highly variable across different global populations. It is most relevant in studies involving individuals with Indigenous American ancestry, where the haplotype is more prevalent. In some populations, such as the Peruvian Indigenous American population, the G allele has been observed at significant frequencies, even in individuals who do not carry the pathogenic repeat expansion. Because this marker is associated with a specific ancestral lineage rather than the disease itself, its presence does not confirm a diagnosis of SCA10.
Interpreting Genetic Information
It is important to understand that rs41524547 is a tool for population genetics and ancestry research, not a diagnostic test for clinical conditions. A reader cannot use this information to determine their personal risk for SCA10 or any other neurological disorder. Genetic markers like rs41524547 provide insights into human migration and the historical distribution of genetic traits, but they do not provide actionable medical information for an individual. If you have concerns about a family history of ataxia, seizures, or other neurological symptoms, it is essential to consult with a qualified medical professional or a genetic counselor. They can provide appropriate clinical testing and guidance based on your specific health history, which is far more accurate than relying on individual SNP data.
How common is this variant?
The frequency of the rs41524547-G allele is highly variable and is most commonly observed in populations with Indigenous American ancestry, where it serves as a marker for the ancestral SCA10 haplotype.
Frequently asked questions
Does having the G allele at rs41524547 mean I have SCA10?
No. The rs41524547-G allele is simply a marker for an ancestral haplotype and does not cause SCA10. A diagnosis of SCA10 requires the presence of a specific, large ATTCT repeat expansion in the ATXN10 gene, which is a separate genetic test.
Can I use this SNP to predict my risk of neurological disease?
No. This SNP is used by researchers to study population history and the origins of genetic traits. It is not a clinical diagnostic tool and cannot be used to predict your personal risk for any disease.
Why is this variant called 'intergenic'?
The term 'intergenic' means the variant is located in the DNA sequence between genes, rather than inside a gene that codes for a protein. Because it is not in a gene, it does not directly change how a protein functions.
Where can I get tested for SCA10?
If you have a family history of SCA10 or are experiencing symptoms, you should speak with a neurologist or a genetic counselor. They can order the appropriate clinical molecular testing to look for the actual repeat expansion in the ATXN10 gene.
Sources & further reading
Educational information only, last refreshed 10/17/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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