rs1270942

This is a downstream gene variant variant in the CFB gene.

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GWAS Catalog Trait Associations (6)

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

spondin-1 measurement

Loya H et al. “A scalable variational inference approach for increased mixed-model association power.” Nature Genetics 57(2):461-468 (2025)
Allele G
OR 0.08
p 4.0e-27
N 47,745
Large GWAS
European

Inguinal hernia

Wei J et al. “Identification of fifty-seven novel loci for abdominal wall hernia development and their biological and clinical implications: results from the UK Biobank.” Hernia : the Journal of Hernias and Abdominal Wall Surgery 26(1):335-348 (2022)
Allele A
OR 1.10
p 1.0e-8
N 275,546
Major Consortium StudyLarge GWAS
European

neuroimaging measurement

Smith SM et al. “An expanded set of genome-wide association studies of brain imaging phenotypes in UK Biobank.” Nature Neuroscience 24(5):737-745 (2021)
Allele G
OR 0.08
p 1.0e-8
N 20,859
Major Consortium StudyLarge GWAS
European
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ClinVar annotation

Benign★☆☆☆
1 submitter
View on ClinVar →
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Research that mentions this SNP (2)

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Genetic analyses of interferon pathway-related genes reveal multiple new loci associated with systemic lupus erythematosus
AssociationN=10,543Paula S. Ramos et al.(2011)· Arthritis &amp; Rheumatism

A three-stage genetic association study of interferon pathway-related genes identifies multiple novel loci associated with systemic lupus erythematosus (SLE). The study evaluated 1,754 genes in two discovery/replication cohorts (939 SLE cases, 3,398 controls) with confirmation in an independent cohort. Novel confirmed associations include CD44 (rs507230, P = 3.98×10⁻¹², OR = 0.71), pleiotrophin/PTN (rs919581, P = 5.38×10⁻⁴), DNAJA1 (rs10971259, P = 6.31×10⁻³), and KPNA1 (rs6810306, P = 4.91×10⁻²).

Traits studied:SLESystemic Lupus Erythematosus
PubMedDOIMetascience Observatory
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MHC region and risk of systemic lupus erythematosus in African American women
AssociationN=1,145Ruiz-Narvaez EA et al.(2011)· Human Genetics

Case-control study in 380 African-American SLE cases and 765 controls identified four independent SNPs in the MHC region associated with systemic lupus erythematosus. The strongest signal was rs9271366 (OR=1.70, p=5.6×10⁻⁵) near HLA-DRB1, with conditional analysis revealing three additional independent variants: rs204890 (OR=1.86, p=1.2×10⁻⁴) in ATF6B, rs2071349 (OR=1.53, p=1.0×10⁻³) in HLA-DPB1, and rs2844580 (OR=1.43, p=1.3×10⁻³) near HLA-B/MICA. A combined genotype score showed additive risk with OR=1.67 per high-risk allele (p<0.0001).

Traits studied:SLE with abnormal antinuclear antibody titersSLE with arthritisSLE with hematologic disorderSLE with immunologic disorderSLE with renal disorderSLE with serositisSLE with skin manifestationsSystemic lupus erythematosus
PubMedDOIMetascience Observatory

About CFB

This gene encodes complement factor B, a component of the alternative pathway of complement activation. Factor B circulates in the blood as a single chain polypeptide. Upon activation of the alternative pathway, it is cleaved by complement factor D yielding the noncatalytic chain Ba and the catalytic subunit Bb. The active subunit Bb is a serine protease which associates with C3b to form the alternative pathway C3 convertase. Bb is involved in the proliferation of preactivated B lymphocytes, while Ba inhibits their proliferation. This gene localizes to the major histocompatibility complex (MHC) class III region on chromosome 6. This cluster includes several genes involved in regulation of the immune reaction. Polymorphisms in this gene are associated with a reduced risk of age-related macular degeneration. The polyadenylation site of this gene is 421 bp from the 5' end of the gene for complement component 2. [provided by RefSeq, Jul 2008]

View all CFB variants →

Gene information from NCBI Gene. Variant classifications from ClinVar.

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