rs10042222 (AP3B1): Educational Attainment Variant
Key takeaways
- rs10042222 is one of 3,952 genome-wide significant variants for educational attainment found in a study of roughly 3 million people.
- A polygenic score built from these variants explains 12-16% of variance in years of schooling completed.
- The alternative allele increases AP3B1 expression in whole blood and testis, and RPL7P23 expression in esophagus tissue.
- Direct genetic effects account for roughly half the polygenic score's total association with educational attainment.
Key takeaways
- rs10042222 is one of 3,952 genome-wide-significant variants for educational attainment identified in a meta-analysis of roughly 3 million individuals.
- A polygenic index built from these variants explains 12-16% of variance in years of schooling completed.
- The alternative allele at this position is associated with increased AP3B1 expression in testis and whole blood, and increased RPL7P23 expression in esophagus muscularis.
- Direct genetic effects, after controlling for parental genotype, account for roughly half the polygenic index's total association with educational attainment.
What the research says rs10042222, located near the AP3B1 (adaptor related protein complex 3 subunit beta 1) gene, was identified among 3,952 approximately independent autosomal loci reaching genome-wide significance in a GWAS meta-analysis of educational attainment (EA) in approximately 3 million individuals. The polygenic index derived from those loci explains 12-16% of EA variance, and direct-effect estimates controlling for parental polygenic indices account for approximately half the index's overall association magnitude. In tissue-specific expression analyses, the alternative allele is linked to increased AP3B1 expression in testis and whole blood, and to increased expression of the nearby pseudogene RPL7P23 in esophagus muscularis GTEx Portal.
Reported associations
- Educational attainment: rs10042222 is among 3,952 approximately uncorrelated autosomal SNPs reaching genome-wide significance for years of schooling in a meta-analysis of approximately 3 million individuals; the combined polygenic index explains 12-16% of EA variance.
- Disease risk (indirect, polygenic): The broader set of EA-associated variants, when assembled into a polygenic index, contributes nontrivial predictive power for ten diseases examined in the same study; individual disease contributions of this specific variant are not reported.
- AP3B1 gene expression: The alternative allele is associated with higher AP3B1 expression in testis (slope +0.13, p=9.9e-15) and whole blood (slope +0.11, p=9.0e-14) at FDR < 0.05 in GTEx eQTL analyses GTEx Portal.
- RPL7P23 pseudogene expression: The alternative allele is associated with higher RPL7P23 expression in esophagus muscularis (slope +0.20, p=1.1e-4) at FDR < 0.05 GTEx Portal.
Evidence quality The educational attainment association comes from a meta-analysis of approximately 3 million individuals, the largest EA GWAS conducted to date, which identified 3,952 genome-wide-significant loci compared to 1,271 in the prior wave; the increase in sample size improved polygenic index prediction by approximately 20% relative to the previous generation. Effect sizes for individual loci in EA GWASs are typically very small, and the individual-level effect size for rs10042222 specifically is not reported in the provided study. The GTEx eQTL data (n = 953 donors, FDR < 0.05) offer statistically robust evidence for tissue-specific regulatory effects at this locus but describe gene-expression mechanism only, not clinical outcome. No replication-specific data for rs10042222 are described in the provided evidence. The disease-risk finding is a polygenic-index-level observation and cannot be attributed to this variant individually.
Tissue-specific expression effects
- AP3B1: The alternative allele is associated with increased expression in testis and whole blood GTEx Portal.
- RPL7P23: The alternative allele is associated with increased expression in esophagus muscularis GTEx Portal.
Lifestyle considerations No lifestyle considerations on file for this variant.
Frequently asked questions
What is rs10042222 associated with?
rs10042222 has been associated with educational attainment in a large genome-wide study of approximately 3 million individuals. The alternative allele is also linked to increased expression of the AP3B1 gene in blood and testis.
What does AP3B1 do in the body?
AP3B1 encodes a subunit of adaptor protein complex 3, which is involved in shuttling proteins within cells toward lysosomes and related compartments. Its specific role in educational attainment biology is not characterized in the provided evidence.
How large is the effect of rs10042222 on education?
The individual effect size of rs10042222 is not reported in the provided study. In large educational attainment GWASs, single variant effects are typically very small; predictive power comes from combining thousands of variants into a polygenic score that collectively explains 12-16% of variance.
Is rs10042222 linked to any diseases?
The broader set of educational attainment variants, combined into a polygenic index, contributes to risk prediction for ten diseases in the same study. Whether rs10042222 individually links to disease risk is not established in the provided evidence.
In which tissues does rs10042222 affect gene expression?
According to GTEx eQTL data, the alternative allele at rs10042222 is associated with increased AP3B1 expression in testis and whole blood, and increased RPL7P23 expression in esophagus muscularis.