Abstract
Phospholipase D (PLD) was purified from cabbage leaves. The molecular weight of purified PLD was estimated as approximately 73 and 87 kDa by gel filtration using Superdex 200 HR column and, sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), respectively. The transphosphatidylation capacity for phosphatidylcholine of this enzyme reached over 90% , and the enzyme's hydrolysis efficiency for phosphatidylcholine was five-fold higher than that for phosphatidylglycerol. These findings indicated that the cabbage PLD efficiently transferred phosphatidylcholine to phosphatidylglycerol. On N-terminal amino acid sequence analysis of the band separated by SDSPAGE, two sequences with differing N-terminus were detected. This N-terminal difference may have been generated by processing during maturation of PLD.
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