catalytic activity:Hydrolysis of the 21-Trp-|-Val-22 bond in big endothelin to form endothelin 1.,cofactor:Binds 1 zinc ion per subunit.,disease:Defects in ECE1 are a cause of Hirschsprung disease, cardiac defects and autonomic dysfunction [MIM:600423]. It is a form of Hirschsprung disease [MIM:142623] with skip-lesions defects, craniofacial abnormalities and other dysmorphic features, and autonomic dysfunction.,enzyme regulation:Inhibited by phosphoramidon.,function:Converts big endothelin-1 to endothelin-1.,similarity:Belongs to the peptidase M13 family.,subunit:Homodimer; disulfide-linked.,tissue specificity:All isoforms are expressed in umbilical vein endothelial cells, polynuclear neutrophils, fibroblasts, atrium cardiomyocytes and ventricles. Isoforms A, B and C are also expressed in placenta, lung, heart, adrenal gland and phaeochromocytoma; isoforms A and C in liver, testis and small intestine; isoform B, C and D in endothelial cells and umbilical vein smooth muscle cells; isoforms C and D in saphenous vein cells, and isoform C in kidney.,
Cell membrane; Single-pass type II membrane protein.
All isoforms are expressed in umbilical vein endothelial cells, polynuclear neutrophils, fibroblasts, atrium cardiomyocytes and ventricles. Isoforms A, B and C are also expressed in placenta, lung, heart, adrenal gland and phaeochromocytoma; isoforms A and C in liver, testis and small intestine; isoform B, C and D in endothelial cells and umbilical vein smooth muscle cells; isoforms C and D in saphenous vein cells, and isoform C in kidney.
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