Russell_2004_Pestic.Biochem.Physiol_79_84

Reference

Title : Two major classes of target site insensitivity mutations confer resistance to organophosphate and carbamate insecticides - Russell_2004_Pestic.Biochem.Physiol_79_84
Author(s) : Russell RJ , Claudianos C , Campbell PM , Horne I , Sutherland TD , Oakeshott JG
Ref : Pesticide Biochemistry and Physiology , 79 :84 , 2004
Abstract :

Interspecific comparisons of bioassay and biochemical data suggest two major patterns of target site resistance to carbamates and organophosphates. Pattern I resistance, which is generally more effective for carbamates, has been shown in two sub-species of mosquitoes to be due to a particular Gly-Ser mutation in the oxyanion hole within the active site of one of their two acetylcholinesterase enzymes. Intriguingly, different substitutions at the equivalent site confer organophosphate hydrolytic ability on other esterases responsible for metabolic resistance in some other species. In the case of the aphid, Myzus persicae, Pattern I resistance is due to a Ser-Phe mutation in the vicinity of the acyl pocket of acetylcholinesterase. Pattern II resistance is at least as effective for organophosphates as it is for carbamates and may even be specific to organophosphates in some cases. Molecular studies on this pattern of resistance in three higher Diptera show that it is due to changes that constrict the acetylcholinesterase active site gorge and limit binding of the insecticide to the catalytic residues at the base of the gorge. One case of Pattern II resistance in the mosquito, Culex tritaeniorhynchus, involves the same site near the acyl pocket of acetylcholinesterase, albeit a different substitution, as that involved in Pattern I resistance in M. persicae.

PubMedSearch : Russell_2004_Pestic.Biochem.Physiol_79_84
PubMedID:

Related information

Citations formats

Russell RJ, Claudianos C, Campbell PM, Horne I, Sutherland TD, Oakeshott JG (2004)
Two major classes of target site insensitivity mutations confer resistance to organophosphate and carbamate insecticides
Pesticide Biochemistry and Physiology 79 :84

Russell RJ, Claudianos C, Campbell PM, Horne I, Sutherland TD, Oakeshott JG (2004)
Pesticide Biochemistry and Physiology 79 :84