Biochimica et Biophysica Acta - General Subjects 2000-Apr
Molecular cloning of a cDNA encoding a novel Ca(2+)-dependent nuclease of Arabidopsis that is similar to staphylococcal nuclease.
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We have isolated a cDNA from Arabidopsis thaliana for a protein consisting of 323 amino acids with similarity to an extracellular nuclease from Staphylococcus. Nuclease assay using toluidine blue-DNA plates has demonstrated that the gene product has nuclease activity dependent on Ca(2+) and inhibited by Zn(2+), designated CAN (Ca(2+)-dependent nuclease). Differing from the staphylococcal nuclease, CAN has neither a signal peptide nor any long hydrophobic regions, suggesting that it is not a secreted protein.