LOC114004376 rs12819: What Your Genotype Means
The rs12819 variant is a non-coding genetic change located within the LOC114004376 regulatory region. It has been associated with syndromic microphthalmia, a developmental disorder characterized by abnormally small eyes.
What each genotype means
Typical genetic profile
This genotype represents the most common sequence observed in the general population at this location. There is no evidence suggesting this specific configuration contributes to the developmental eye conditions associated with this variant.
This is the most frequent genotype found across all major global ancestral populations.
Rare variant carrier
You carry one copy of the rare allele associated with this variant. Research into this specific site is limited, but it has been noted in studies regarding developmental eye disorders; however, carrying this genotype does not confirm the presence of any condition.
This genotype is extremely rare and is found in a very small fraction of the global population.
Rare variant homozygous
You carry two copies of the rare allele associated with this variant. While this variant is cataloged in relation to syndromic microphthalmia, current scientific literature provides limited data on the clinical implications of this specific homozygous genotype. Please consult with a genetic counselor or medical professional to discuss any concerns regarding your eye health.
This genotype is exceptionally rare and is observed in a negligible percentage of the global population.
Understanding the rs12819 Variant
The rs12819 variant is a single nucleotide polymorphism (SNP) situated within the LOC114004376 locus. Unlike variants that alter the sequence of a protein, this SNP is located in a non-coding region of the genome. Non-coding variants are increasingly recognized for their role in regulating gene expression, acting as switches that determine when and how much of a specific gene product is made. In the case of rs12819, research indicates that this region functions as a regulatory element, specifically acting as a repressive element that influences transcriptional output. Because it does not code for a protein directly, its biological impact is measured by how it affects the activity of nearby genes involved in complex developmental processes, such as the formation of the eye.
The Role of LOC114004376
LOC114004376 is identified as a functional regulatory element. Scientific studies, including those using massively parallel reporter assays, have validated its role as a negative regulatory region. It operates through chromatin state-associated repression, meaning it helps maintain the structure of DNA in a way that can silence or reduce the expression of target genes. In the context of human development, such regulatory regions are critical for ensuring that genes are expressed at the right time and in the right tissues. When these regulatory switches are disrupted, it can lead to significant developmental consequences. The specific association of this locus with eye development highlights the importance of non-coding DNA in orchestrating the precise biological events required for normal ocular formation.
Research and Clinical Associations
The evidence linking rs12819 to syndromic microphthalmia is considered moderate. Microphthalmia is a condition where one or both eyes are abnormally small, and it is often part of a broader syndrome involving other systemic or neurodevelopmental abnormalities. Research has identified that pathogenic variants within this regulatory locus can disrupt normal eye development, leading to the clinical features observed in affected individuals. While the association is documented, it is important to note that microphthalmia is a genetically heterogeneous condition, meaning it can be caused by variants in many different genes. Because this variant is non-coding and regulatory, researchers focus on its impact on transcriptional networks rather than protein-mediated activity. Current studies continue to investigate how these regulatory disruptions contribute to the diverse clinical spectrum of microphthalmia.
What This Information Means for You
If you have encountered this variant in a genetic report, it is essential to understand that this information is for educational purposes and does not constitute a medical diagnosis. Genetic variants, especially those in regulatory regions, often have complex effects that depend on the broader genetic background and environmental factors. You cannot use this information to predict health outcomes or make medical decisions on your own. If you have concerns about eye health or a family history of developmental disorders, the most appropriate step is to consult with a qualified healthcare professional, such as a clinical geneticist or an ophthalmologist. They can provide context based on your personal medical history and guide you through appropriate clinical testing or genetic counseling if necessary.
How common is this variant?
The rs12819 variant is classified as rare in the general population. Specific frequency data varies by ancestry, and it is typically identified through clinical research focused on developmental eye disorders.
Frequently asked questions
What is syndromic microphthalmia?
Syndromic microphthalmia is a developmental disorder where the eyes are abnormally small, often occurring alongside other systemic or neurodevelopmental health issues. It is a complex condition with many potential genetic causes.
Is rs12819 a mutation?
In genetics, rs12819 is referred to as a variant. While some variants are benign, others can be associated with health conditions if they disrupt important biological processes like gene regulation.
Can I test for this variant at home?
While some direct-to-consumer tests may include this SNP, clinical interpretation requires professional expertise. You should discuss any findings with a genetic counselor or physician.
Does having this variant mean I will have eye problems?
No, having a specific genotype does not guarantee a health outcome. Genetic associations are statistical, and many factors influence the development of complex conditions like microphthalmia.
Sources & further reading
Educational information only, last refreshed 9/16/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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