Glucosinolate myrosinase

Glucosinolates Myrosinase Vegetable seeds Positive or negative character, e.g. antinutritional, toxic and off-flavour effects, as well as anticarcinogenic properties... 

PONTOPPIDAN, B., Studies of the Glucosinolate-Myrosinase System in Relation to Insect Herbivory on Oilseed Rape (Brassica napus) and in Arabidopsis thaliana., PhD thesis, Swedish University of Agricultural Sciences., Agraria, 2001. 

KLIEBENSTEIN, D., PEDERSEN, D BARKER, B MITCHELL-OLDS, T Comparative analysis of quantitative trait loci controlling glucosinolates, myrosinase and insect resistance in Arabidopsis thaliana., Genetics, 2002,161,325-332. 

BRIDGES, M, JONES, A.M.E., BONES, A.M., HODGSON, C., COLE, R, BARTLET, E WALLSGROVE, R., KARAPAPA, V.K., WATTS, N., ROSSITER, J.T., Spatial organization of the glucosinolate-myrosinase system in Brassica specialist aphids is similar to that of the host plant., Proc. R. Soc. Lond. Ser. B-Biol. Sci, 2002, 269, 187-191. 

J.T., Spatial organization of the glucosinolate-myrosinase system in brassica... 

Glucosinolates in the presence of water and a suitable catalyst and at an appropriate temperature may undergo transformation. The indigenous enzyme myrosinase unfortunately serves the catalytic function only too well once the seed is crushed. The architectural destruction of the seed required to produce good oil release inevitably results in intimate contact of the glucosinolates, myrosinase and water, and the reaction then needs only an appropriate temperature and period of time to occur. The reaction rate starts to... 

There are two rich sources of organosulphur compounds from plants (1) Alliaceae family containing alliin-alliinase system and (2) Cruciferae (Brassicacae) family e.g. Brassica juncea, Wasabia japonica (wasabi), Armoracia rusticam (horseradish) and Brassica oleracea (cauliflower) containing glucosinolate-myrosinase (Mithen 2006). A number of sulphur-containing compounds can be derived from these plants through the action of myrosinase and alliinase enzymes. 

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