AMMECR1 rs1057519338: Understanding This Rare Genetic Variant
The rs1057519338 variant is a rare genetic mutation located within the AMMECR1 gene. It has been associated with a complex of clinical features including midface hypoplasia, hearing impairment, and nephrocalcinosis.
What each genotype means
Typical AMMECR1 gene function
This is the most common genotype and represents the typical sequence for the AMMECR1 gene. Individuals with this genotype do not carry the specific p.Arg168Ter nonsense mutation associated with the clinical features of AMMECR1-related growth and developmental conditions.
This is the reference genotype and is found in the overwhelming majority of the human population.
Carrier of potential loss-of-function
This genotype indicates you carry one copy of the p.Arg168Ter mutation. Because AMMECR1 is located on the X chromosome, the clinical expression of this variant differs by sex; biological males (who have only one X chromosome) may manifest symptoms more severely, while biological females may have milder or no symptoms due to the presence of a second, functional X chromosome. Please discuss these findings and their clinical relevance with a genetic counselor or qualified clinician.
This genotype is extremely rare in the general population.
Potential loss-of-function mutation
This genotype indicates the presence of two copies of the p.Arg168Ter mutation. This would generally only be observed in biological females or in specific chromosomal contexts. Research suggests that loss-of-function variants in AMMECR1 are linked to developmental and physiological features, including midface hypoplasia, hearing impairment, and growth alterations. It is important to discuss these results with a healthcare provider to understand the implications for your health.
This genotype is exceptionally rare and has not been commonly observed in standard population databases.
What is the rs1057519338 Variant?
The variant rs1057519338 represents a specific change in the DNA sequence of the AMMECR1 gene. In genetic terminology, this is often referred to as a p.Arg168Ter mutation, which indicates a substitution that introduces a premature stop codon in the protein-coding sequence. This type of change typically results in the production of a truncated, or shortened, protein, which may not function correctly within the cell. Located on the X chromosome at position Xq23, this variant is considered rare. Because it is located on the X chromosome, the clinical presentation of such variants can differ significantly between individuals based on their biological sex, as males have only one X chromosome while females have two. Understanding the location and nature of this variant is the first step in investigating how it might influence biological processes.
The Role of the AMMECR1 Gene
The AMMECR1 gene, which stands for 'Alport syndrome, mental retardation, midface hypoplasia and elliptocytosis chromosomal region gene 1,' provides instructions for making a protein found in the nucleoplasm of cells. While the exact biological function of the AMMECR1 protein remains a subject of ongoing research, its importance is highlighted by its location in a region of the X chromosome often involved in contiguous gene deletion syndromes. Historically, deletions in this area that include AMMECR1, along with neighboring genes like COL4A5, have been linked to the AMME complex. This complex is characterized by a constellation of symptoms including Alport syndrome, intellectual disability, midface hypoplasia, and elliptocytosis. Because AMMECR1 is situated near genes critical for kidney basement membrane structure, researchers study it to determine how it contributes to the broader clinical spectrum of these hereditary conditions.
Research Associations and Evidence Strength
Current scientific literature associates mutations in AMMECR1, including the p.Arg168Ter variant, with a specific phenotype involving midface hypoplasia, hearing impairment, and nephrocalcinosis. Research, such as studies published in the Journal of Medical Genetics, has identified that single point mutations in this gene can cause developmental delays and physical features previously attributed only to larger chromosomal deletions. However, the evidence strength for this specific variant remains limited. Much of the existing data comes from case reports or small family studies rather than large-scale population-wide association studies. Because the condition is rare, clinical interpretation of this variant requires careful consideration of an individual's full genetic profile and clinical history. It is important to note that the presence of a variant does not guarantee the development of specific symptoms, and clinical variability is common.
Population Frequency and Clinical Context
The rs1057519338 variant is classified as rare across global populations. In genetics, 'rare' typically means that the variant is found at a very low frequency in the general population, often making it difficult to study through standard statistical methods used for common traits. Because of its rarity, there is limited information regarding its distribution across different ancestral groups. Most identified cases have been discovered in the context of clinical diagnostic testing for individuals presenting with specific developmental or physical symptoms. If you have received information about this variant from a genetic test, it is essential to discuss the findings with a qualified healthcare provider or a genetic counselor. They can help interpret the results within the context of your personal and family medical history and provide guidance on whether further clinical evaluation is appropriate.
What You Can and Cannot Do With This Information
Genetic information regarding rare variants like rs1057519338 is primarily intended for educational and research purposes. You cannot use this information to self-diagnose or predict health outcomes with certainty. Genetic variants do not act in isolation; they interact with other genes, environmental factors, and lifestyle choices to influence health. If you are concerned about symptoms related to the conditions mentioned in this article, the most effective step is to consult with a medical professional, such as a clinical geneticist or a specialist familiar with hereditary syndromes. They can order appropriate diagnostic tests and provide a comprehensive assessment. Avoid making medical decisions based solely on raw genetic data, as professional clinical interpretation is necessary to understand the true significance of any genetic finding in your specific case.
How common is this variant?
The rs1057519338 variant is extremely rare in the general population, with no significant frequency data available across major ancestral cohorts.
Frequently asked questions
Is rs1057519338 a cause of Alport syndrome?
While AMMECR1 is located near the COL4A5 gene, which is a primary cause of Alport syndrome, the AMMECR1 gene itself is associated with a distinct, though sometimes overlapping, clinical phenotype. Research suggests that mutations in AMMECR1 contribute to a specific syndrome involving midface hypoplasia and other features.
What should I do if my genetic report shows this variant?
If your report identifies this variant, you should consult with a genetic counselor or a physician. They can help you understand the clinical relevance of the finding based on your personal health history and whether any follow-up testing is recommended.
Are there treatments for AMMECR1-related conditions?
Management for conditions associated with this gene is typically supportive and focused on addressing specific symptoms, such as hearing impairment or renal issues. There is no single 'cure' for the genetic variant itself, so treatment plans are highly individualized.
Is this variant inherited?
Yes, as a genetic variant, it can be passed from parents to children. Because it is located on the X chromosome, the pattern of inheritance follows X-linked rules, which means it affects males and females differently.
Sources & further reading
Educational information only, last refreshed 9/23/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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