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  • Title: Cloning and tissue distribution of a novel serine protease esp-1 from human eosinophils.
    Author: Inoue M, Kanbe N, Kurosawa M, Kido H.
    Journal: Biochem Biophys Res Commun; 1998 Nov 18; 252(2):307-12. PubMed ID: 9826525.
    Abstract:
    We have cloned a novel serine protease designated as esp-1 from human eosinophils. The amino acid sequence deduced from the cDNA showed that ESP-1 comprises a signal peptide of 18 amino acids, a propeptide of 23 amino acids, an active form sequence of 273 amino acids starting from an Ile-Val-Gly-Gly-Glu motif, the catalytic triad of serine proteases that has been characterized as the essential amino acid residues for the proteolytic activity, and a hydrophobic amino acid stretch in the carboxyl terminus, suggesting this enzyme is a novel membrane-type serine protease. The tissue distributions of esp-1 expression revealed that this protease is not only expressed in human eosinophils, but also widely expressed in mononuclear cells and various tissues other than skeletal muscle and kidney and is most abundant in testis and prostate, and moderately so in lung, spleen and pancreas.
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