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Phospholipase D Activity in the Tetrahymena pyriformis GL
Author(s) -
KOVÁCS P.,
CSABA G.,
NAKASHIMA S.,
NOZAWA Y.
Publication year - 1997
Publication title -
cell biochemistry and function
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.933
H-Index - 61
eISSN - 1099-0844
pISSN - 0263-6484
DOI - 10.1002/(sici)1099-0844(199703)15:1<53::aid-cbf720>3.0.co;2-f
Subject(s) - tetrahymena pyriformis , phospholipase d , sodium orthovanadate , sodium fluoride , phosphatidic acid , phosphatidylinositol , phospholipase c , biochemistry , phospholipase , microbiology and biotechnology , biology , chemistry , signal transduction , tetrahymena , enzyme , phosphatase , fluoride , inorganic chemistry , phospholipid , membrane
Phospholipase D (PLD) is an enzyme which participates in the signalling mechanism cleaving phosphatidylcholine (PC) to choline and phosphatidic acid (PA). In Tetrahymena pyriformis GL this enzyme activity is enhanced by different kinds of agonists (sodium orthovanadate, sodium fluoride and phorbol 12‐myristate 13‐acetate), and its activity can be inhibited by inhibitors such as pertussis toxin, calphostin C, genistein, trifluoperazine. These results suggest that the PLD signalling pathway is connected with the tyrosine kinase, phospholipase C, phosphatidylinositol and G‐protein coupled signalling pathways. By demonstrating the PLD activity in Tetrahymena our knowledge on the signalling mechanisms at a unicellular level has been extended. The results support our view that most transducing mechanisms that are characteristic of mammalian cells are also in the protozoan Tetrahymena . © 1997 John Wiley & Sons, Ltd.