Contains nonheme iron. A common plant lipoxygenase that oxidizes linoleate and alpha-linolenate, the two most common polyunsaturated fatty acids in plants, by inserting molecular oxygen at the C-13 position with (S)-configuration. This enzyme produces precursors for several important compounds, including the plant hormone jasmonic acid. EC 1.13.11.58, linoleate 9S-lipoxygenase, catalyses a similar reaction at the second available position of these fatty acids.
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SYSTEMATIC NAME
IUBMB Comments
linoleate:oxygen 13-oxidoreductase
Contains nonheme iron. A common plant lipoxygenase that oxidizes linoleate and alpha-linolenate, the two most common polyunsaturated fatty acids in plants, by inserting molecular oxygen at the C-13 position with (S)-configuration. This enzyme produces precursors for several important compounds, including the plant hormone jasmonic acid. EC 1.13.11.58, linoleate 9S-lipoxygenase, catalyses a similar reaction at the second available position of these fatty acids.
trilinolein and extracted polar and nonpolar lipids are oxidized with a ratio (9S,10E,12Z)-9-hydroperoxy-10,12-octadecadienoate to (9Z,11E,13S)-13-hydroperoxy-9,11-octadecadienoate of 6:94, 2:98, and 7:93. The stereoisomer ratios (S:R) of (9Z,11E)-13-hydroperoxy-9,11-octadecadienoate with these substrates are 82:18, 92:8, and 91:9 whereas (10E,12Z)-9-hydroperoxy-10,12-octadecadienoate is analyzed (R)-configured with 41:59, 47:53, and 40:60 (S:R)
induces LOX activity. Cd-induced intracellular LOX activity increases equally along the barley root tip, while Cd-induced apoplastic LOX activity is associated mainly with the differentiation zone of the barley root tip. Cd-induced LOX activity in plants growing at 21°C increases with increasing temperatures
Garbe, L.A.; Barbosa de Almeida, R.; Nagel, R.; Wackerbauer, K.; Tressl, R.
Dual positional and stereospecificity of lipoxygenase isoenzymes from germinating barley (green malt): biotransformation of free and esterified linoleic acid