Way toward 鈥淒ietary Pesticides鈥? Molecular Investigation of Insecticidal Action of Caffeic Acid against Helicoverpa armigera
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- 作者：R. S. Joshi ; T. P. Wagh ; N. Sharma ; F. A. Mulani ; U. Sonavane ; H. V. Thulasiram ; R. Joshi ; V. S. Gupta ; A. P. Giri
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2014
- 出版时间：November 12, 2014
- 年：2014
- 卷：62
- 期：45
- 页码：10847-10854
- 全文大小：507K
- ISSN：1520-5118
文摘
Bioprospecting of natural molecules is essential to overcome serious environmental issues and pesticide resistance in insects. Here we are reporting insights into insecticidal activity of a plant natural phenol. In silico and in vitro screening of multiple molecules supported by in vivo validations suggested that caffeic acid (CA) is a potent inhibitor of Helicoverpa armigera gut proteases. Protease activity and gene expression were altered in CA-fed larvae. The structure鈥揳ctivity relationship of CA highlighted that all the functional groups are crucial for inhibition of protease activity. Biophysical studies and molecular dynamic simulations revealed that sequential binding of multiple CA molecules induces conformational changes in the protease(s) and thus lead to a significant decline in their activity. CA treatment significantly inhibits the insect鈥檚 detoxification enzymes, thus intensifying the insecticidal effect. Our findings suggest that CA can be implicated as a potent insecticidal molecule and explored for the development of effective dietary pesticides.