Rs729302

A variant located 64 bp upstream of the first untranslated exon (exon 1A), consisting of a 5 bp insertion/deletion CGGGG, may be the causative SNP in this region that is most responsible for increasing SLE risk, however it lacks an rs# (i.e. it isn't registered in dbSNP).

A meta-analysis comprising 5 case-control studies, totaling 6,582 rheumatoid arthritis cases and 5,375 controls, concluded that several IRF5 gene SNPs were indeed (still) significantly associated with the disease. The rs729302(C) allele was associated with a slight protective effect (odds ratio 0.89, CI: 0.8-0.977, p = 0.015).