RANBP10 rs12926610: Genetics and Strabismus Risk
The genetic variant rs12926610 is a single nucleotide polymorphism located on chromosome 16 in a regulatory region linked to RANBP10 and several nearby genes. Research has identified this variant as an expression quantitative trait locus (eQTL) associated with altered odds of strabismus, particularly within admixed American ancestry cohorts. Because it functions as a common regulatory marker rather than a diagnostic mutation, carrying specific alleles only modestly influences baseline ocular alignment susceptibility.
What each genotype means
Typical risk profile
You carry two copies of the standard G allele at this locus. Large-scale multi-ancestry association studies have linked the alternative A allele to slight variations in RANBP10 regulatory activity and eye alignment risk, meaning carrying two standard alleles aligns with the baseline population risk. Research into this locus remains focused primarily on admixed cohorts, and having this genotype does not rule out developing childhood or adult vision conditions.
Carried by the vast majority of individuals globally, including approximately 70% to 80% of individuals in admixed American and European populations.
Modestly altered expression profile
You carry one copy of the A allele, which has been identified as an expression quantitative trait locus (eQTL) that influences expression of RANBP10 and nearby genes. Research in admixed American cohorts suggests this allele is associated with a nominally increased statistical likelihood of strabismus (eye misalignment), although the evidence is ancestry-specific and overall effect sizes are modest. Genetic markers only represent statistical predispositions and are not diagnostic of visual disorders.
Carried by approximately 20% to 30% of individuals in admixed American populations and common across several global ancestries.
Altered gene expression profile
You carry two copies of the A allele, which is associated in functional studies with altered regulatory expression of RANBP10 and surrounding regional genes. This variant was highlighted in genetic studies of admixed American populations as showing an association with strabismus susceptibility. However, evidence remains exploratory and polygenic, meaning having two copies slightly shifts relative statistical odds rather than causing an eye disorder on its own.
Carried by roughly 1% to 5% of individuals across most global populations.
Genomic Location and the Nature of rs12926610
The variant rs12926610 is a common single nucleotide polymorphism (SNP) situated on chromosome 16 at base position 68,514,806 (in the GRCh38 human reference assembly). It features a transition between guanine (G) and adenine (A) alleles. Rather than disrupting a protein-coding sequence directly, rs12926610 resides in a non-coding genomic region with active regulatory properties. Genetic databases and functional genomics screens identify it as an expression quantitative trait locus (eQTL). This classification indicates that the variant alleles correlate with differences in the relative expression levels of several regional genes, including RANBP10, ZFP90, DUS2, and CTCF. Because the change does not truncate or malform a protein, its biological influence is mediated through subtle modulation of gene transcription in relevant tissues.
Biological Roles of the RANBP10 Gene
The RANBP10 gene encodes Ran-binding protein 10, a cytoplasmic factor that acts as a guanine nucleotide exchange factor (GEF) for the small GTPase RAN and directly interacts with beta-tubulin. Cellular studies demonstrate that RANBP10 is involved in microtubule assembly, noncentrosomal microtubule stabilization, and cytoskeletal organization across various tissues, including the brain and musculoskeletal structures. Microtubules are essential structural components for cellular scaffolding, vesicle trafficking, and neurodevelopmental patterning. Additionally, RANBP10 integrates into the CTLH multiprotein complex, participating in targeted proteasome-mediated protein catabolism. Alterations in the transcriptional regulation of RANBP10 and neighboring developmental genes may exert downstream effects on the delicate neuromuscular coordination required for ocular motility and cranial nerve signaling.
Research Associations and Strength of Evidence
In large-scale genetic investigations, such as ancestry-stratified analyses performed within the All of Us Research Program, rs12926610 emerged as a notable candidate locus for strabismus, a complex condition characterized by misalignment of the visual axes. In admixed American (AMR) cohorts, the variant approached the traditional threshold for genome-wide significance with a p-value of 5.29 x 10^-8. Functional mapping highlighted rs12926610 as an eQTL for RANBP10 alongside surrounding loci like ESRP2 and CTCF. However, current evidence is classified as moderate: while the statistical association is strong in admixed American groups, it did not achieve universal genome-wide significance across all ancestral cohorts, and strabismus remains an extensively polygenic trait influenced by numerous subtle loci and environmental factors.
Population Patterns and Allele Distribution
Public genomic repositories, including dbSNP and the Genome Aggregation Database (gnomAD), show that rs12926610 is a common polymorphism worldwide. The minor allele frequency (MAF) consistently exceeds 0.05 across multiple continental lineages. In admixed American populations, the minor allele occurs frequently, aligning with the cohort parameters under which the strabismus association was detected. In European, African, and Asian reference populations, both the G and A alleles are observed at substantial frequencies, though exact proportions vary by regional background. Because common alleles of this type are widely distributed throughout healthy populations, possessing the risk-associated allele is neither rare nor uniquely predictive on its own.
Clinical Interpretation: What You Can and Cannot Do
Understanding an rs12926610 genotype provides educational insight into baseline biological variation, but it has no standalone diagnostic utility. Strabismus is a complex disorder influenced by neuromuscular development, optical refraction, environmental variables, and dozens of minor genetic loci. Carrying one or two copies of the minor allele does not mean an individual will develop ocular misalignment, nor does carrying the reference genotype guarantee normal binocular vision. Commercial or direct-to-consumer genetic readouts for this marker should never replace comprehensive pediatric or adult eye examinations. If you or a family member notice signs of eye deviation, double vision, or visual fatigue, consult an optometrist or ophthalmologist for professional diagnostic evaluation and care.
How common is this variant?
The rs12926610 variant is common across global populations, with a minor allele frequency exceeding 0.05 in admixed American, European, and African ancestry groups.
Frequently asked questions
Does having the rs12926610 risk allele mean I will develop strabismus?
No. The rs12926610 variant represents a modest statistical risk factor, not a deterministic cause. Strabismus is a multifactorial trait influenced by many genes, neurodevelopmental factors, and environmental triggers.
What is an eQTL and how does it relate to RANBP10?
An expression quantitative trait locus (eQTL) is a genetic variant that correlates with the level of RNA produced by specific genes. For rs12926610, the variant alleles are linked to variations in the expression levels of RANBP10 and several adjacent genes on chromosome 16.
Can an eye doctor test for rs12926610 to diagnose an eye turn?
No, clinical eye exams do not use rs12926610 testing. Eye specialists diagnose strabismus using objective physical evaluations of binocular vision, visual acuity, ocular motility, and alignment.
Why was this association specifically highlighted in admixed American ancestry?
The statistical signal for rs12926610 reached near-genome-wide significance within the admixed American cohort of the All of Us research study. Allele frequencies and background linkage patterns can vary across populations, making certain genetic associations more detectable in specific ancestral backgrounds.
Sources & further reading
Educational information only, last refreshed 9/13/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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