Stable expression and functional characterisation of the diamondback moth ryanodine receptor G4946E variant conferring resistance to diamide insecticides

A - Papers appearing in refereed journals

Troczka, B. J., Williams, A. J., Williamson, M. S., Field, L. M., Luemmen, P. and Davies, T. G. E. 2015. Stable expression and functional characterisation of the diamondback moth ryanodine receptor G4946E variant conferring resistance to diamide insecticides. Scientific Reports. 5, p. 14680.

AuthorsTroczka, B. J., Williams, A. J., Williamson, M. S., Field, L. M., Luemmen, P. and Davies, T. G. E.
Abstract

Diamides, such as flubendiamide and chlorantraniliprole, belong to a new chemical class of insecticides that act as conformation-sensitive activators of insect ryanodine receptors (RyRs). Both compounds are registered for use against lepidopteran species such as the diamondback moth, Plutella xylostella, a notorious global pest of cruciferous crops. Recently acquired resistance to diamide insecticides in this species is thought to be due to a target-site mutation conferring an amino acid substitution (G4946E), located within the trans-membrane domain of the RyR, though the exact role of this mutation has not yet been fully determined. To address this we have cloned a full-length cDNA encoding the P. xylostella RyR and established clonal Sf9 cell lines stably expressing either the wildtype RyR or the G4946E variant, in order to test the sensitivity to flubendiamide and chlorantraniliprole on the recombinant receptor. We report that the efficacy of both diamides was dramatically reduced in clonal Sf9 cells stably expressing the G4946E modified RyR, providing clear functional evidence that the G4946E RyR mutation impairs diamide insecticide binding.

Year of Publication2015
JournalScientific Reports
Journal citation5, p. 14680
Digital Object Identifier (DOI)doi:10.1038/srep14680
Open accessPublished as ‘gold’ (paid) open access
Funder project or codeDelivering Sustainable Systems (SS) [ISPG]
Publisher's version
Output statusPublished
PublisherSpringer Nature
Nature Publishing Group
Copyright licenseCC BY
ISSN2045-2322

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