rs527210

This is a intron variant variant in the ABO gene.

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GWAS Catalog Trait Associations (10)

Genome-wide significant associations (p < 5×10⁻⁸) from the NHGRI-EBI GWAS Catalog.

protein measurement

Hartley AE et al. “Deciphering tissue-specific protein regulation for insights into cardiometabolic disease.” Molecular Metabolism 104:102314 (2026)
Allele C
OR —
p 6.0e-27
N 262
Small GWAS
European

macrophage scavenger receptor types I and II level

Loya H et al. “A scalable variational inference approach for increased mixed-model association power.” Nature Genetics 57(2):461-468 (2025)
Allele T
OR 0.05
p 2.0e-22
N 47,745
Large GWAS
European

level of nitric oxide synthase, endothelial in blood

Loya H et al. “A scalable variational inference approach for increased mixed-model association power.” Nature Genetics 57(2):461-468 (2025)
Allele T
OR 0.06
p 2.0e-20
N 47,745
Large GWAS
European

level of complement receptor type 2 in blood

Loya H et al. “A scalable variational inference approach for increased mixed-model association power.” Nature Genetics 57(2):461-468 (2025)
Allele T
OR 0.05
p 1.0e-18
N 47,745
Large GWAS
European

interleukin-1 receptor type 2 measurement

Loya H et al. “A scalable variational inference approach for increased mixed-model association power.” Nature Genetics 57(2):461-468 (2025)
Allele T
OR 0.04
p 2.0e-16
N 47,745
Large GWAS
European

myocardial infarction

Sakaue S et al. “A cross-population atlas of genetic associations for 220 human phenotypes.” Nature Genetics 53(10):1415-1424 (2021)
Allele T
OR 0.07
p 5.0e-13
N 623,029
Large GWAS
multi-ancestry

fibroblast growth factor receptor 2 level

Loya H et al. “A scalable variational inference approach for increased mixed-model association power.” Nature Genetics 57(2):461-468 (2025)
Allele T
OR 0.04
p 6.0e-13
N 47,745
Large GWAS
European

level of aminopeptidase N in blood

Loya H et al. “A scalable variational inference approach for increased mixed-model association power.” Nature Genetics 57(2):461-468 (2025)
Allele T
OR 0.04
p 7.0e-13
N 47,745
Large GWAS
European

level of immunoglobulin superfamily member 21 in blood

Loya H et al. “A scalable variational inference approach for increased mixed-model association power.” Nature Genetics 57(2):461-468 (2025)
Allele T
OR 0.04
p 2.0e-12
N 47,745
Large GWAS
European

About ABO

This gene encodes proteins related to the first discovered blood group system, ABO. Variation in the ABO gene (chromosome 9q34.2) is the basis of the ABO blood group, thus the presence of an allele determines the blood group in an individual. The 'O' blood group is caused by a deletion of guanine-258 near the N-terminus of the protein which results in a frameshift and translation of an almost entirely different protein. Individuals with the A, B, and AB alleles express glycosyltransferase activities that convert the H antigen into the A or B antigen. Other minor alleles have been found for this gene. [provided by RefSeq, Apr 2022]

View all ABO variants →

Gene information from NCBI Gene. Variant classifications from ClinVar.

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