کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2009720 | 1066683 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quantitative prediction of AHAS inhibition by pyrimidinylsalicylate based herbicides
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
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چکیده انگلیسی
Acetohydroxyacid synthase (AHAS) inhibition by pyrimidylsalicylate based herbicides is studied within the framework of quantitative structure-activity relationship (QSAR) methodology. A general model for this family of herbicides is developed to predict molar pI50, i.e. the logarithm of the reciprocal molar concentration of herbicide required for 50% inhibition of the AHAS activity. The model, which involves only four descriptors: two geometric and two quantum chemical, accounting for the steric, electrostatic and hydrogen bonding interactions responsible for the binding of the herbicide to the enzyme; predicts the molar pI50 with a squared correlation coefficient of 0.89 and a standard deviation of 0.43. The training set includes 30 structures of substituted O-(4,6-dimethoxypyrimidin-2-yl) salicylic acids and thio analogs, covering a pI50 range from about 3 to 8Â U. The model is validated with an external set of 13 structures not included in the training set.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Pesticide Biochemistry and Physiology - Volume 95, Issue 1, September 2009, Pages 33-37
Journal: Pesticide Biochemistry and Physiology - Volume 95, Issue 1, September 2009, Pages 33-37
نویسندگان
Gerardo A. DÃaz, Eduardo J. Delgado,