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Way toward ``dietary pesticides'': molecular investigation of insecticidal action of caffeic acid against helicoverpa armigera

TitleWay toward ``dietary pesticides'': molecular investigation of insecticidal action of caffeic acid against helicoverpa armigera
Publication TypeJournal Article
Year of Publication2014
AuthorsJoshi, RS, Wagh, TP, Sharma, N, Mulani, FA, Sonavane, U, Thulasiram, HV, Joshi, RS, Gupta, VS, Giri, AP
JournalJournal of Agricultural and Food Chemistry
Volume62
Pagination10847-10854
Date PublishedNOV
ISSN0021-8561
KeywordsCaffeic acid, Helicoverpa armigera, insecticidal activity, protease inhibitor
Abstract

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-activity 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's 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.

DOI10.1021/jf503437r
Funding Agency

Council of Scientific & Industrial Research (CSIR) - India

Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

2.22

Divison category: 
Biochemical Sciences
Organic Chemistry