Department of Biochemistry and Biophysics, University of California, Davis, California 95616.
Plant Physiol. 1980 Jun;65(6):1199-202. doi: 10.1104/pp.65.6.1199.
A survey has been made of the occurrence and distribution of three enzymes which metabolize cyanide in a variety of higher plants including both cyanogenic and non-cyanogenic species. The enzymes investigated were beta-cyanoalanine synthase, rhodanese and formamide hydrolyase. beta-Cyanoalanine synthase was found to be present in every higher plant tested whereas rhodanese was found to occur far less commonly in plants. Formamide hydrolyase activity was not detected in any of the higher plants tested.In addition, quantitative analyses have been made of the potential hydrogen cyanide content of each plant investigated. A general trend was apparent between the hydrogen cyanide potential and cyanide metabolizing activity, in that the higher the hydrogen cyanide potential, in general, the higher the cyanide metabolizing activity.
已经对包括氰苷和非氰苷物种在内的多种高等植物中代谢氰化物的三种酶的发生和分布进行了调查。所研究的酶为β-氰基丙氨酸合酶、硫代硫酸酯酶和甲酰胺水解酶。发现β-氰基丙氨酸合酶存在于所有测试的高等植物中,而硫代硫酸酯酶在植物中的发生则要少得多。在测试的任何高等植物中都未检测到甲酰胺水解酶活性。此外,还对每个被调查植物的潜在氢氰酸含量进行了定量分析。在氢氰酸潜在值和氰化物代谢活性之间存在明显的趋势,即氢氰酸潜在值越高,通常氰化物代谢活性也越高。