這個基因編碼內皮素-1的受體，內皮素-1是一種在有效和持久的血管收縮中起作用的肽這種受體與鳥嘌呤核苷酸結合（G）蛋白相結合，這種結合激活了磷脂酰肌醇鈣第二信使系統該基因的多態性與偏頭痛抵抗有關。選擇性剪接導致多個轉錄變體[由RefSeq提供，2009年10月]
This gene encodes the receptor for endothelin-1, a peptide that plays a role in potent and long-lasting vasoconstriction. This receptor associates with guanine-nucleotide-binding (G) proteins, and this coupling activates a phosphatidylinositol-calcium second messenger system. Polymorphisms in this gene have been linked to migraine headache resistance. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2009]