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Structural characterization of a Lymnaea putative endoprotease related to human furin

Structural characterization of a Lymnaea putative endoprotease related to human furin

FEBS (Federation of European Biochemical Societies) Letters 343(1): 27-31

A number of peptides have been identified in the central nervous system of the freshwater snail, Lymnaea stagnalis, that function as hormones and neurotransmitters/neuromodulators. These peptides are typically proteolytically processed from larger prohormones mostly at sites composed of single or multiple basic amino acid residues. Previously we demonstrated a diversity of putative prohormone convertases that may be involved in prohormone processing in the Lymnaea brain. In the present report, we have characterized a cDNA clone encoding a putative endoprotease of 837 amino acids. The primary structure of the endoprotease (Lfur2) was comparable to that of human furin and contained a putative catalytic domain, a Cys-rich domain, and a transmembrane region. The catalytic domain of Lfur2 demonstrated about 70% residue identity when compared with human furin, PACE4 and Drosophila Dfur1 and dKLIP-1. The Lfur2 gene was expressed in the central nervous system as well as various peripheral tissues of Lymnaea.

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Accession: 009465130

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PMID: 8163012

DOI: 10.1016/0014-5793(94)80600-4

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