Abstract
Apyrases belong to the ATPase family of enzymes that hydrolyze phosphoanhydride bonds of nucleoside tri- and di-phosphates. These enzymes differ markedly from other phosphohydrolases due to their high specific activity, broad divalent cation requirement, broad nucleotide substrate specificity, and insensitivity to various inhibitors. In the past 30Â years, apyrases have been frequently studied in mammals. In comparison, research of apyrases in plants has received little attention, despite the growth of plants being closely related to the apyrases. In this review, we summarize the research of the apyrases in Arabidopsis thaliana and point to the possible future directions of research. Apyrases have seven members found in Arabidopsis thaliana, each with different properties and functions. Currently, the characterization and functions of AtAPY1 and AtAPY2 have been reported, though, to the best of our knowledge, the other apyrase members (AtAPY3 to 7) have not yet been sufficiently described. In this review, we also summarize the progress being made and the difficulties encountered in apyrase research in Arabidopsis thaliana.
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