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Biochem Biophys Res Commun. 1995 Nov 22;216(3):1079-87.

Peroxinectin, a novel cell adhesion protein from crayfish blood.

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Department of Physiological Botany, University of Uppsala, Sweden.


From blood cells of the crayfish Pacifastacus leniusculus a 76-kDa protein that mediated attachment and spreading of the crayfish blood cells was purified. The cDNA for this cell adhesion protein was isolated, cloned, and sequenced. The deduced protein sequence was significantly similar to one family of peroxidases, e.g., myeloperoxidase. Consistently, the 76-kDa protein, for which we propose the name peroxinectin, had peroxidase activity. A synthetic peptide derived from the peroxinectin sequence containing Lys-Gly-Asp mimicked the cellular activity of the intact protein, implicating this sequence as the cell-binding site. Peroxinectin is the first cell adhesion molecule cloned from invertebrate blood and, to our knowledge, the first protein from any organism that combines being a cell adhesion ligand and a peroxidase.

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