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  • Title: The cloning and characterization of a murine secretory leukocyte protease inhibitor cDNA.
    Author: Zitnik RJ, Zhang J, Kashem MA, Kohno T, Lyons DE, Wright CD, Rosen E, Goldberg I, Hayday AC.
    Journal: Biochem Biophys Res Commun; 1997 Mar 27; 232(3):687-97. PubMed ID: 9126337.
    Abstract:
    Human secretory leukocyte protease inhibitor (hSLPI) is produced by epithelial cells at mucosal surfaces, where it regulates both the neutrophil-mediated inflammation that characterizes inflammatory diseases, and pathogens themselves via both antiprotease and "defensin-like" activities. Additionally, hSLPI may regulate other processes such as cutaneous desquamation and placental invasiveness. To better understand the primary physiologic roles of SLPI, it will be important to establish a genetically tractable animal model, the most attractive candidate being the mouse. In this report, the cloning and characterization of murine (m) SLPI is described. mSLPI is encoded by a single copy gene, and appears structurally highly similar to hSLPI. At the same time, significant differences between mSLPI and hSLPI are presented, notably a difference in expression pattern, and a structural difference in the protease binding site that correlates with a difference in the spectrum of protease inhibiton. Such species-specific evolution of this protease inhibitor is notable given that species-specific structure-function differences have previously been reported for the alpha-1 antitrypsin family.
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