Insect pests may reuse fat-shuttling proteins to dodge pesticides
Qiao JW, Li L, Mobarak SH, Liu TX, Wu BJ
Crop Improvement
The aphids and beetles you're fighting off your tomatoes might be using the same protein pumps that build their protective shell to flush out the pesticide you just sprayed, which is part of why some pests keep coming back.
Insects and mites have a waxy outer coating that keeps them from drying out, built by tiny protein pumps embedded in their cells. This review looks at growing evidence that those same pumps can also grab hold of insecticides and shove them out of harm's way, which may explain why some pests become resistant to sprays over time. Researchers say more testing is needed before we know exactly how widespread this dual role is across different pest species.
Key Findings
Structural studies on a red flour beetle transporter (TcABCH-9C) support a 'squeeze-pump' model that moves both ceramide-like lipids and the insecticide fenoxycarb through the same channel.
The authors identify three distinct ways insecticides might interfere with these transporters: competing for the same binding site, physically blocking the pump, or disrupting its function without directly competing.
Findings from one beetle transporter cannot yet be generalized to other insect and mite species; the paper proposes a tiered evidence framework (structural, biochemical, physiological, genetic) to validate claims before broader application.
chevron_right Technical Summary
Scientists mapped how certain proteins in insect and mite cell membranes both build the insects' waxy outer shell and help pump out insecticides, showing why some pests survive chemical treatments. Understanding this shared machinery could lead to smarter, more targeted pest control that spares beneficial bugs.
Abstract Preview
Original paper
ABCG and ABCH transporters at the interface of cuticular lipid transport and insecticide handling.
ATP-binding cassette (ABC) transporters are widely associated with insecticide resistance, yet the physiological links between endogenous transport and xenobiotic handling remain incompletely resol...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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