COMPETITIVE INTERACTION OF 3 PEROXIDIZING HERBICIDES WITH THE BINDING OF [H-3] ACIFLUORFEN TO CORN ETIOPLAST MEMBRANES

被引:50
作者
VARSANO, R
MATRINGE, M
MAGNIN, N
MORNET, R
SCALLA, R
机构
[1] INRA,HERBICIDES LAB,BV 1540,F-21034 DIJON,FRANCE
[2] FAC SCI ANGERS,CHIM ORGAN LAB,F-49045 ANGERS,FRANCE
关键词
Binding; Diphenylether; Herbicide; Protoporphyrinogen oxidase;
D O I
10.1016/0014-5793(90)80459-V
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The specific binding of the herbicide acifluorfen 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid to corn etioplast membranes is competitively inhibited by protoporphyrinogen IX, the substrate of protoporphyrinogen oxidase. Three other peroxidizing molecules, oxadiazon [5-ter-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)-1,3,4-oxadiazol-2-one], LS 82556 [(S)3-N-(methylbenzyl)carbamoyl-5-propionyl-2,6-lutidine], and M&B 39279 [5-amino-4-cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)pyrazol], also compete with acifluorfen for its binding site. The four herbicides thus bind to the same site, or to closely located sites, on the enzyme protoporphyrinogen oxidase. © 1990.
引用
收藏
页码:106 / 108
页数:3
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