Structure of the Flight Muscle Thick Filament from the Bumble Bee, Bombus ignitus, at 6 A Resolution.

ABSTRACT: Four insect orders have flight muscles that are both asynchronous and indirect; they are asynchronous in that the wingbeat frequency is decoupled from the frequency of nervous stimulation and indirect in that the muscles attach to the thoracic exoskeleton instead of directly to the wing. Flight muscle thick filaments from two orders, Hemiptera and Diptera, have been imaged at a subnanometer resolution, both of which revealed a myosin tail arrangement referred to as “curved molecular crystalline layers”. Here, we report a thick filament structure from the indirect flight muscles of a third insect order, Hymenoptera, the Asian bumble bee Bombus ignitus. The myosin tails are in general agreement with previous determinations from Lethocerus indicus and Drosophila melanogaster. The Skip 2 regio

SUBMITTER: Li J 

PROVIDER: S-EPMC9820631 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature