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  • Title: Structure of the precursor of Xenopus laevis endothelin-3 and phylogenetic analysis.
    Author: Quan J, Takizawa S, Adur J, Nara E, Uchide T, Saida K.
    Journal: J Cardiovasc Pharmacol; 2004 Nov; 44 Suppl 1():S260-4. PubMed ID: 15838295.
    Abstract:
    Endothelin (ET)-related receptors homologous to mammalian receptors have been cloned from Xenopus laevis, indicating that ET-related ligands may be present in this species. Here we cloned cDNAs encoding preproendothelin-3 (PPET-3) from the X. laevis intestinal cDNA library. X. laevis ET-3 cDNA encodes 201 amino acids, including a 20-amino-acid putative signal sequence, as well as mature ET-3, big ET-3, and ET-3-like sequences. X. laevis ET-3 differs by one amino acid from mammalian ET-3, and is identical to frog ET-3 recently purified from Rana ridibunda. This sequence together with other published PPET sequences were used to analyze the phylogenetic relationship among all ET family genes. This is the first report of the cDNA encoding the precursor protein of ET-3 in a non-mammalian species.
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