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Ovi-protective mothers: exploring the proteomic profile of weevil (Gonipterus) egg capsules

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Souza, N. M., Wang, T., Suwansa-ard, S., Nahrung, H. F. and Cummins, S. F. (2022) Ovi-protective mothers: exploring the proteomic profile of weevil (Gonipterus) egg capsules. Heliyon, 8 (9). ISSN 2405-8440


Article Link: https://doi.org/10.1016/j.heliyon.2022.e10516


Insects of different orders produce elaborate structures to protect their eggs from the many threats they may face from the environment and natural enemies. In the weevil genus Gonipterus, their dark, hardened egg capsule is possibly generated by a mixture of the insects' excrement and glandular substances. To test this hypothesis, this study focused on the elucidation of protein components present in the egg capsule cover and interrogated them through comparative analysis and gene expression to help infer potential functions. First, female Gonipterus sp. n. 2 reproductive and alimentary tissues were isolated to establish a reference transcriptome-derived protein database. Then, proteins from weevil frass (excrement) and egg capsule cover were identified through mass spectrometry proteomics. We found that certain egg capsule cover proteins were both exclusive and shared between frass and egg capsule cover, including those of plant origin (e.g. photosystem II protein) and others secreted by the weevil, primarily from reproductive tissue. Among them, a mucin/spidroin-like protein and novel proteins with repetitive units that likely play a structural role were identified. We have confirmed the dual origin of the egg capsule cover substance as a blend of the insects? frass and secretions. Novel proteins secreted by the weevils are key candidates for holding the egg case cover together.

Item Type:Article
Business groups:Horticulture and Forestry Science
Additional Information:Open access
Keywords:Ootheca Mucin Spidroin Vitellogenin Anti-chymotrypsin Structural protein
Subjects:Science > Zoology > Invertebrates > Insects
Animal culture > Insect culture and beneficial insects
Live Archive:19 Sep 2022 04:03
Last Modified:19 Sep 2022 04:03

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