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The human endothelin-1 gene (EDN1) encoding a peptide with potent vasoactive properties maps distal to HLA on chromosome arm 6p in close linkage to D6S89.

We determined the precise genetic location of the human endothelin-1 gene (EDN1), which encodes a peptide with extremely potent vasoactive properties and is apparently involved in a spectrum of diseases ranging from hypertension to asthma. Analyzing the segregation of a four-allele EDN1 polymorphism in 40 CEPH families including 480 individuals, we detected significant linkage of EDN1 to DNA markers spanning the telomeric half of chromosome arm 6p. EDN1 was closest to the highly polymorphic nucleotide-repeat marker D6S89 at a theta = 0.06 with the highest pairwise LOD score Zmax = 31.2. Subsequent multipoint analysis placed EDN1 at 8 cM distal to D6S89; EDN1 was flanked at its telomeric site at a 13-cM distance by the gene encoding the A subunit of blood clotting factor XIII (F13A1). Furthermore, EDN1 was located at approximately 34-36 cM distal to the HLA region defined by HLA-A, -B, and -DRB1, and 31 cM proximal to the most telomeric marker D6S7. This location of EDN1 on the primary genetic map is strongly supported with odds of 2.7 x 10(12):1 against the next best alternative.