Abstract:
:A novel membrane lipoxygenase (LOX; EC 1.13.11.12) from eggplant (Solanum melongena L. cv. Belleza negra) fruit chloroplasts has been purified 20-fold to a specific activity of 207 enzymatic units per mg of protein with a yield of 72%. The purification was carried out by sonicating the chloroplastic membranes in the presence of Triton X-114 followed by phase partitioning and anion exchange chromatography. The purified membrane LOX preparation consisted of a single major band with an apparent molecular mass of 97 kDa after sodium dodecyl sulfate polyacrylamide gel electrophoresis. The results obtained using intact chloroplasts indicate that the enzyme is not localized in the stroma. When the enzyme reacts with linoleic acid, it produces a single peak, which comigrates with standard 9-hydroperoxy-octadecadienoic acid. A physiological role for this chloroplastic LOX is proposed.
journal_name
Physiol Plantjournal_title
Physiologia plantarumauthors
Pérez-Gilabert M,López-Nicolás JM,García Carmona Fdoi
10.1034/j.1399-3054.2001.1110303.xsubject
Has Abstractpub_date
2001-03-01 00:00:00pages
276-282issue
3eissn
0031-9317issn
1399-3054pii
ppl1110303journal_volume
111pub_type
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