RAD51C rs12946397: Understanding This Genetic Variant
The rs12946397 variant is a single nucleotide polymorphism (SNP) located within the RAD51C gene. Research has investigated its potential role in DNA repair mechanisms and its association with susceptibility to certain types of cancer.
What each genotype means
Typical RAD51C profile
This is the most common genotype for this variant. Research indicates that individuals with this genotype do not show the elevated markers of oxidative stress associated with the rare T allele.
This is the most common genotype observed in general population databases.
Increased oxidative stress marker
Carriers of this genotype have been observed to have higher levels of blood plasma TBARS, a marker of oxidative stress, compared to those with the C/C genotype. While this variant is located in the RAD51C gene, it has not been shown to significantly change the risk of unselected breast cancer.
This genotype is considered rare in the general population.
Increased oxidative stress marker
Individuals with this genotype may exhibit higher levels of blood plasma TBARS, which is a marker of oxidative stress. Current research suggests this variant does not significantly alter the risk of unselected breast cancer, though it is part of a gene involved in DNA repair.
This genotype is rare across most studied populations.
What is rs12946397?
The variant rs12946397 is a specific change in the human genetic code, categorized as a single nucleotide polymorphism (SNP). It is located on chromosome 17 at position 58,692,618 (GRCh38). This SNP sits within the genomic region of the RAD51C gene, which is adjacent to the TEX14 gene. In genetic databases, this variant is identified by its rsID, a unique reference number used by researchers to track specific locations in the genome. Because it is a non-coding variant, it does not change the protein sequence directly, but researchers study such variants to see if they influence how genes are regulated or expressed. Understanding the location of this SNP helps scientists map its proximity to functional elements that may influence cellular health and DNA stability.
The Role of the RAD51C Gene
The RAD51C gene provides instructions for making a protein that is essential for the repair of damaged DNA. Specifically, the RAD51C protein plays a critical role in homologous recombination, a process that cells use to fix double-strand breaks in DNA. When DNA damage occurs, the cell must repair it accurately to prevent mutations that could lead to genomic instability. Because of its function in maintaining the integrity of the genome, RAD51C is considered a tumor suppressor gene. When the RAD51C protein is not functioning correctly, cells may struggle to repair DNA damage efficiently, which can increase the risk of developing certain conditions. Research into variants within this gene often focuses on how they might alter the efficiency of these vital repair pathways.
Research and Associations
Scientific studies have explored the relationship between rs12946397 and various health outcomes, particularly cancer susceptibility. Some research has investigated whether this variant influences the risk of breast and ovarian cancer, as well as its potential role in modulating oxidative stress and DNA damage characteristics. However, the evidence regarding this specific SNP is considered moderate. While some studies have suggested associations, others have found that non-coding variants in this region do not significantly change the risk of unselected breast cancer. It is important to note that genetic associations are often complex and can be influenced by other genetic and environmental factors. Current findings highlight the need for further large-scale studies to clarify the clinical significance of this variant in different populations.
Population Frequency
The rs12946397 variant is generally considered rare in the general population. Because it is not a common variant, it is not frequently observed in standard genetic screening panels. Population frequency can vary significantly based on ancestral background, and researchers continue to collect data to better understand its distribution across diverse groups. When a variant is rare, it can be more challenging to establish definitive statistical links to health outcomes, as the sample sizes required to achieve high confidence are much larger. Genetic databases like gnomAD provide ongoing updates on the frequency of such variants, helping the scientific community refine their understanding of how often this specific genetic change appears in different human populations worldwide.
Interpreting Genetic Information
Information about genetic variants like rs12946397 is intended for educational purposes and should not be used for medical diagnosis or personal health decisions. Genetic research is a rapidly evolving field, and a single SNP rarely determines health outcomes on its own. If you have concerns about your genetic risk for cancer or other conditions, it is essential to consult with a qualified healthcare professional or a genetic counselor. They can provide context based on your personal and family medical history, which is often more predictive than a single genetic variant. Never make changes to your medical care or lifestyle based solely on information found in genetic databases or online articles without first discussing it with your clinician.
How common is this variant?
The rs12946397 variant is documented as rare in the general population, with specific frequency data varying by ancestral group.
Frequently asked questions
Is rs12946397 a cause of cancer?
No, rs12946397 is not considered a direct cause of cancer. It is a genetic variant that researchers study to understand potential associations with cancer susceptibility, but it does not guarantee the development of any disease.
Should I get tested for this variant?
Genetic testing for specific SNPs like rs12946397 is not a standard clinical practice. If you are concerned about your cancer risk, speak with a doctor or genetic counselor about comprehensive testing based on your family history.
What does the RAD51C gene do?
The RAD51C gene produces a protein that helps repair damaged DNA. This repair process is vital for maintaining genomic stability and preventing the accumulation of harmful mutations.
Where can I find more information on this SNP?
You can find technical data on this variant through resources like the NCBI dbSNP database or the GWAS Catalog. These sites provide curated information on genetic variants and their reported associations.
Sources & further reading
Educational information only, last refreshed 10/9/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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