Secretory Phospholipase A2

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  • Murakami Makoto
    Department of Health Chemistry, School of Pharmaceutical Sciences, Showa University
  • Kudo Ichiro
    Department of Health Chemistry, School of Pharmaceutical Sciences, Showa University

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  • Secretory phospholipase A http dx org

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Abstract

Secretory phospholipase A2 (sPLA2) is a growing family of structurally related, disulfide-rich, low molecular weight, lipolytic enzymes with a His-Asp catalytic dyad. sPLA2s are distributed in a wide variety of vertebrate and invertebrate animals, plants, bacteria, and viruses, and there are 10 catalytically active sPLA2 isozymes in mammals. Although the structural bases for mammalian sPLA2s have been well documented, their physiological functions are still subject to debate. Individual mammalian sPLA2s have distinct enzymatic properties and display distinct tissue expression patterns, suggesting that each enzyme acts on distinct phospholipid membrane moieties in vivo. In this article, we briefly review our latest understanding of the possible physiological functions of sPLA2s, in keeping with their diverse actions on mammalian and nonmammalian cell membranes.

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