PLANT PHYSIOLOGY , Vol 105, Issue 1 15-18, Copyright © 1994 by American Society of Plant Biologists
Molecular Modeling Indicates that Two Chemically Distinct Classes of Anti-Mitotic Herbicide Bind to the Same Receptor Site(s)
J. R. Ellis, R. Taylor and P. J. Hussey
Zeneca Seeds and Agrochemicals, Jealott's Hill Research Station, Bracknell, Berkshire RG12 6EY, United Kingdom (J.R.E., R.T.)
Dinitroaniline and phosphorothioamidate herbicides disrupt microtubule
assembly from tubulin protein dimers and thereby halt microtubule-based
processes such as mitosis in plant cells. Despite the contrasting chemical
properties of dinitroaniline and phosphorothioamidate herbicides, a
three-dimensional molecular analysis revealed remarkable electrostatic
similarity between these two classes of herbicide. From these data it is
proposed that dinitroaniline and phosphorothioamidate herbicides share
common binding site(s) in the plant cell.