RHO rs61752895: Understanding This Rare Genetic Variant
The rs61752895 variant is a rare genetic change located in the RHO gene, which provides instructions for making the rhodopsin protein. This specific variant is associated with autosomal dominant retinitis pigmentosa, a condition characterized by the progressive loss of rod photoreceptor cells in the eye.
What each genotype means
Typical rhodopsin gene structure
This genotype represents the common, non-variant form of the RHO gene at this position. It is not associated with the specific structural changes linked to autosomal dominant retinitis pigmentosa described for this variant.
This is the most common genotype found in the vast majority of the global population.
Potential vision health risk
This genotype indicates the presence of one copy of the variant, which is associated with autosomal dominant retinitis pigmentosa. Because this condition is inherited in an autosomal dominant manner, carrying this variant may increase the risk of progressive rod photoreceptor loss and vision impairment. Individuals with this result should consult with an ophthalmologist or a genetic counselor to discuss clinical implications and appropriate monitoring.
This genotype is extremely rare, with a minor allele frequency reported as less than 0.0001 across global populations in gnomAD.
Rare variant homozygous state
This genotype indicates the presence of two copies of the variant. While the variant is primarily associated with autosomal dominant inheritance, the presence of two copies suggests a significant alteration in the rhodopsin protein structure that may lead to severe retinal degeneration. Clinical evaluation by a specialist is strongly recommended to understand the specific impact on ocular health.
This genotype is exceptionally rare and is not typically observed in standard population frequency databases.
What is the rs61752895 Variant?
The rs61752895 variant is a specific alteration in the DNA sequence of the RHO gene. In genetics, a single nucleotide polymorphism (SNP) like this represents a change at a single position in the genetic code. This particular variant is classified as non-synonymous, meaning it results in an amino acid change within the protein structure. Because the RHO gene is critical for the function of rod photoreceptors—the cells in the retina responsible for vision in low-light conditions—changes to its sequence can disrupt the normal production or folding of the rhodopsin protein. When this protein is misfolded or dysfunctional, it can lead to cellular stress and the eventual death of photoreceptor cells, which is the hallmark of retinal degenerative conditions.
The Role of the RHO Gene
The RHO gene encodes rhodopsin, a light-sensitive pigment found in the rod cells of the retina. When light enters the eye, it strikes the rhodopsin protein, triggering a conformational change that initiates a complex signal transduction cascade. This process converts light energy into electrical signals that are sent to the brain, allowing us to see. Rhodopsin is essential for night vision and peripheral vision. Because the protein must be precisely shaped to function correctly, even minor mutations can cause the protein to misfold. These misfolded proteins can accumulate within the cell, causing toxicity that leads to the progressive degeneration of rod photoreceptors, a process commonly observed in various forms of inherited retinal diseases.
Research and Clinical Associations
Research associates variants in the RHO gene, including those like rs61752895, with autosomal dominant retinitis pigmentosa (adRP). In this inheritance pattern, a single copy of the altered gene is sufficient to cause the condition. Studies indicate that RHO mutations are a significant cause of adRP, accounting for approximately 25% of cases in some populations. While the evidence linking specific RHO mutations to retinal degeneration is strong, the clinical presentation can vary significantly between individuals, even those with the same variant. It is important to note that while this variant is identified in the context of retinal disease, the strength of evidence for any single rare variant can be limited, and clinical interpretation often requires comprehensive genetic testing and evaluation by an ophthalmologist or genetic counselor.
Population Frequency
The rs61752895 variant is considered extremely rare across all global populations. According to large-scale genomic databases like gnomAD, the minor allele frequency (MAF) is well below 0.0001. Because the variant is so uncommon, it is not typically found in the general population. Its presence is usually identified only in the context of clinical diagnostic testing for individuals or families experiencing symptoms of inherited retinal degeneration. Due to its rarity, there is limited data regarding its distribution across different ancestral groups, and it is not a variant that would be expected in a standard consumer genetic screening panel.
Managing Genetic Information
If you have received information about a rare variant like rs61752895, it is essential to understand that this is not a medical diagnosis. Genetic variants are only one piece of a complex puzzle that includes environmental factors and other genetic modifiers. You cannot 'fix' or 'change' a genetic variant, but you can take proactive steps by consulting with a medical professional. If you are concerned about vision loss or family history, speak with an ophthalmologist who specializes in inherited retinal diseases. They can provide appropriate clinical testing, discuss the implications of your results, and offer guidance on the latest research or potential management strategies. Always rely on qualified clinicians for health decisions rather than interpreting genetic data in isolation.
How common is this variant?
The rs61752895 variant is very rare across all global populations, with a minor allele frequency (MAF) of less than 0.0001 in gnomAD.
Frequently asked questions
What is retinitis pigmentosa?
Retinitis pigmentosa is a group of rare, inherited eye disorders that involve the breakdown and loss of cells in the retina. It typically causes night blindness and a gradual loss of side vision.
Is there a cure for RHO-associated retinal disease?
Currently, there is no universal cure for RHO-associated retinitis pigmentosa. Research into gene therapies and pharmacological treatments is ongoing, but you should consult a retinal specialist for the most current clinical options.
Should I get tested for this variant?
Genetic testing is typically recommended by a doctor if you have symptoms of a retinal condition or a family history of inherited eye disease. It should be performed in a clinical setting with genetic counseling.
Does having this variant mean I will go blind?
Not necessarily. The progression of retinal diseases is highly variable, and many factors influence how a condition develops. A clinical evaluation by an eye specialist is necessary to understand your specific prognosis.
Sources & further reading
Educational information only, last refreshed 9/28/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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Pathogenic missense variant causing rhodopsin Pro23His substitution that leads to autosomal dominant retinitis pigmentosa and progressive night blindness.
Constitutively active rhodopsin variant (Gly90Asp) causing autosomal dominant congenital stationary night blindness (CSNB).
Encodes the Pro23His (P23H) substitution in rhodopsin, the most common autosomal dominant retinitis pigmentosa allele in North America.
Rhodopsin missense variant (p.Pro23His) responsible for classical autosomal dominant retinitis pigmentosa with rod photoreceptor degeneration.
Classic Pro23His (p.P23H) mutation in rhodopsin causing autosomal dominant retinitis pigmentosa.
A missense substitution (p.Arg135Trp) within rhodopsin's cytoplasmic loop that causes severe autosomal dominant retinitis pigmentosa through defective phototransduction signaling.