Properties of a Lipoxygenase in Green Algae (Oscillatoria sp.)
Author(s) -
JeanLouis Beneytout,
Rivo-Hery Andrianarison,
Zafisolo. Rakotoarisoa,
Marie Tixier
Publication year - 1989
Publication title -
plant physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.554
H-Index - 312
eISSN - 1532-2548
pISSN - 0032-0889
DOI - 10.1104/pp.91.1.367
Subject(s) - lipoxygenase , algae , oscillatoria , enzyme , linoleic acid , chemistry , green algae , biochemistry , food science , biology , stereochemistry , botany , cyanobacteria , fatty acid , bacteria , genetics
A lipoxygenase preparation was obtained from green algae Oscillatoria sp. and was shown to differ from previous described lipoxygenases in the positional specificity and pH characteristics of the dioxygenation reaction. The enzyme had a pH optimum at 8.8 and was inactive at pH 6. Oscillatoria lipoxygenase converted linoleic acid into two products: 13-hydroperoxylinoleic acid (52%) and 9-hydroperoxylinoleic acid (48%). The molecular weight of the enzyme was estimated at 124,000. Esculetin was found to be the best inhibitor of the enzyme activity.
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