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  • Title: Head group specificity of phospholipase D isoenzymes from poppy seedlings (Papaver somniferum L.).
    Author: Oblozinsky M, Ulbrich-Hofmann R, Bezakova L.
    Journal: Biotechnol Lett; 2005 Feb; 27(3):181-5. PubMed ID: 15717127.
    Abstract:
    The biocatalytical potential of two new phospholipase D (PLD) isoenzymes from poppy seedlings (Papaver somniferum L.), PLD-A and PLD-B, was examined by comparing their activities in phospholipid transformation. Both enzymes showed the same ratio in rates of hydrolysis [phosphatidylcholine (PC):phosphatidylglycerol (PG):phosphatidylserine:phosphatidylinositol = 1:0.5:0.3:0.1] and were inactive towards phosphatidylethanolamine (PE). PLD-A did not catalyze head group exchange whereas PLD-B showed a high transphosphatidylation potential in the conversion of PC into PG and PE. This enzyme also catalyzed the transesterification of octadecylphosphocholine into octadecylphosphoglycerol or octadecylphosphoethanolamine.
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