Understanding rs1045109000: A Rare Genetic Variation
The genetic variant rs1045109000 is an extremely rare single nucleotide variation found in the human genome. Currently, it is considered an uncharacterized variant with no established clinical significance or known association with specific health traits.
What each genotype means
Common genetic variant
This genotype is frequently observed in clinical databases. Current research does not associate this specific variant with any known clinical condition or trait, and it is generally considered a common variation in the human genome.
This is a common genotype found in general population studies.
Common genetic variant
This genotype represents a heterozygous state for this variant. There is no established clinical significance or specific trait association linked to this genotype in current scientific literature.
This genotype is observed at frequencies consistent with common variation in the population.
Common genetic variant
This genotype is a standard variation found in the population. It is not currently linked to any specific health outcomes or clinical traits in published research.
This genotype occurs as a common variation across various ancestral groups.
What is rs1045109000?
A single nucleotide polymorphism, or SNP, is a variation at a single position in a DNA sequence among individuals. The identifier rs1045109000 is a unique reference number assigned by the dbSNP database to track this specific location in the human genome. Because the human genome is vast, containing billions of base pairs, researchers assign these 'rs' numbers to ensure that scientists worldwide are referring to the exact same spot when conducting studies. This particular variant is located on chromosome 19. In the context of genomic research, rs1045109000 is categorized as a variation that has been cataloged but not yet linked to any specific biological function or disease state. It serves as a data point in the ongoing effort to map the full spectrum of human genetic diversity.
The Role of Genomic Context
While some variants sit within genes that provide instructions for making proteins, others are located in non-coding regions of the genome that may regulate gene expression. According to available genomic data, rs1045109000 is associated with the CYP4F22 gene region. The CYP4F22 gene is involved in the metabolism of certain lipids and plays a role in skin barrier function. However, simply being located near or within a gene does not mean a variant alters that gene's function. Many variants are 'neutral,' meaning they do not change the protein produced or the way the gene is regulated. Because rs1045109000 has not been characterized as having a functional impact, it is currently viewed as a neutral variation that does not disrupt the normal biological processes associated with the surrounding genomic neighborhood.
Research and Clinical Significance
In the field of genetics, 'clinical significance' refers to whether a variant is known to cause or contribute to a medical condition. As of now, there is no evidence in major clinical databases, such as ClinVar, to suggest that rs1045109000 is linked to any disease or health trait. The evidence strength for any association is currently limited or non-existent. Most variants identified in large-scale sequencing projects like gnomAD are rare and often benign. When a variant is described as 'uncharacterized,' it means that researchers have not yet performed the necessary functional studies or large-scale population association studies to determine if it has any effect on human health. Consequently, this variant is not used in clinical diagnostics, and it does not provide actionable information for medical decision-making.
Population Frequency
The frequency of a genetic variant tells us how often it appears in a given population. Data from the Genome Aggregation Database (gnomAD) indicates that rs1045109000 is extremely rare, with an allele frequency so low that it is effectively absent in most studied populations. For example, in large cohorts of European, African, and East Asian individuals, the variant is rarely observed. This extreme rarity is common for many variants in the human genome; the vast majority of the millions of variants cataloged in databases are found in only a tiny fraction of the population. Because it is so uncommon, it is difficult for researchers to gather enough data to study its potential effects, which is a primary reason why it remains uncharacterized in current scientific literature.
What This Information Means for You
If you have encountered this variant in a personal genetic report, it is important to understand that it is not a diagnostic finding. Because rs1045109000 has no established clinical significance, it does not indicate a risk for disease or a specific health trait. Genetic testing often identifies thousands of variants, and the vast majority are benign background noise that does not impact your health. You cannot use this information to make medical decisions or change your lifestyle. If you are concerned about your genetic results, the best course of action is to consult with a certified genetic counselor or your primary healthcare provider. They can help you interpret your report in the context of your personal and family medical history, ensuring that you do not place undue weight on variants that have no known impact on human health.
How common is this variant?
The variant is extremely rare, with an allele frequency reported in gnomAD as approximately 0.000001663, making it absent in the vast majority of the global population.
Frequently asked questions
Is rs1045109000 a disease-causing mutation?
No. There is currently no evidence to suggest that this variant causes any disease or health condition.
Why is this variant in my genetic report?
Genetic testing services often provide comprehensive lists of all variants detected, even those that are benign or uncharacterized. Its inclusion does not imply that it has any clinical relevance to your health.
Should I be worried about this variant?
No. Because it is an uncharacterized variant with no known clinical significance, it is considered a normal part of human genetic variation.
Can I use this information to change my diet or medication?
No. This variant has no known impact on medication response or nutritional needs. Always consult your physician before making changes to your medical or health regimen.
Sources & further reading
Educational information only, last refreshed 10/20/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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This variant is a rare, uncharacterized single nucleotide variation with no established clinical significance in major databases.
This variant is an uncharacterized single nucleotide variation with no established clinical significance.
This variant is an uncharacterized single nucleotide variation with no established clinical significance.
This variant is an uncharacterized single nucleotide variation with no established clinical significance.
This rsID is not currently recognized as a valid, stable SNP in major public databases like dbSNP or Ensembl.
This variant is an uncharacterized single nucleotide variation with no established clinical significance.