ABC Transporter Functions As a Pacemaker for Sequestration of Plant Glucosides in Leaf Beetles
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Plant-herbivore interactions dominate the planet's terrestrial ecology. When it comes to host-plant specialization, insects are among the most versatile evolutionary innovators, able to disarm multiple chemical plant defenses. Sequestration is a widespread strategy to detoxify noxious metabolites, frequently for the insect's own benefit against predation. In this study, we describe the broad-spectrum ATP-binding cassette transporter CpMRP of the poplar leaf beetle, Chrysomela populi as the first candidate involved in the sequestration of phytochemicals in insects. CpMRP acts in the defensive glands of the larvae as a pacemaker for the irreversible shuttling of pre-selected metabolites from the hemolymph into defensive secretions. Silencing CpMRP in vivo creates a defenseless phenotype, indicating its role in the secretion process is crucial. In the defensive glands of related leaf beetle species, we identified sequences similar to CpMRP and assume therefore that exocrine gland-based defensive strategies, evolved by these insects to repel their enemies, rely on ABC transporters as a key element. DOI: http://dx.doi.org/10.7554/eLife.01096.001.
Ropcke M, Lu S, Plate C, Meinzer F, Lisiecki A, Dobler S Molecules. 2024; 29(22).
PMID: 39598661 PMC: 11596062. DOI: 10.3390/molecules29225272.
Zhang W, Li Y, Wang Q, Yu Q, Ma Y, Huang L DNA Res. 2024; 31(6).
PMID: 39250428 PMC: 11555684. DOI: 10.1093/dnares/dsae027.
microRNA maintains nutrient homeostasis in the symbiont-host interaction.
Shang F, Ding B, Niu J, Lu J, Xie X, Li C Proc Natl Acad Sci U S A. 2024; 121(36):e2406925121.
PMID: 39196627 PMC: 11388328. DOI: 10.1073/pnas.2406925121.
Girdling behavior of the longhorn beetle modulates the host plant to enhance larval performance.
Choi M, Lee J, Kim J, Kim S, Joo Y BMC Ecol Evol. 2024; 24(1):49.
PMID: 38637737 PMC: 11025245. DOI: 10.1186/s12862-024-02228-z.
Binding and sequestration of poison frog alkaloids by a plasma globulin.
Alvarez-Buylla A, Fischer M, Garzon M, Rangel A, Tapia E, Tanzo J Elife. 2024; 12.
PMID: 38206862 PMC: 10783871. DOI: 10.7554/eLife.85096.