Venom Peptide Repertoire of the European Myrmicine Ant Manica rubida: Identification of Insecticidal Toxins
peer-reviewed · Journal of Proteome Research · 2020
| Date | 2020-04-03 |
| Type | peer-reviewed |
| Venue | Journal of Proteome Research |
| Publisher | American Chemical Society (ACS) |
| Contribution | downstream-application |
| DOI | 10.1021/acs.jproteome.0c00048 |
| Citations (OpenAlex) | 48 |
| Venue 2-year citedness | 3.83 |
Abstract
Using an integrated transcriptomic and proteomic approach, we characterized the venom peptidome of the European red ant, Manica rubida . We identified 13 “myrmicitoxins” that share sequence similarities with previously identified ant venom peptides, one of them being identified as an EGF-like toxin likely resulting from a threonine residue modified by O- fucosylation. Furthermore, we conducted insecticidal assays of reversed-phase HPLC venom fractions on the blowfly Lucilia caesar , permitting us to identify six myrmicitoxins (i.e., U 3 -, U 10 -, U 13 -, U 20 -MYRTX-Mri1a, U 10 -MYRTX-Mri1b, and U 10 -MYRTX-Mri1c) with an insecticidal activity. Chemically synthesized U 10 -MYRTX-Mri1a, -Mri1b, -Mri1c, and U 20 -MYRTX-Mri1a irreversibly paralyzed blowflies at the highest doses tested (30-125 nmol·g -1). U 13 -MYRTX-Mri1a, the most potent neurotoxic peptide at 1 h, had reversible effects after 24 h (150 nmol·g -1). Finally, U 3 -MYRTX-Mri1a has no insecticidal activity, even at up to 55 nmol·g -1 . Thus, M. rubida employs a paralytic venom rich in linear insecticidal peptides, which likely act by disrupting cell membranes.
Methods and tools
- Manica rubida ant venom insecticidal toxins: Venom peptidome of the red ant Manica rubida by transcriptomics plus PEAKS de novo peptide sequencing, identifying 13 myrmicitoxins, six of them insecticidal.
Methods it uses
- PEAKS: Commercial DP-based de novo
Data deposited
- Mass spectrometry of Manica rubida venom — as deposited · PXD015675
Cites (3)
- The Peptide Venom Composition of the Fierce Stinging Ant Tetraponera aethiops (Formicidae: Pseudomyrmecinae) (2019) crossref
- Proteomic Analysis of the Venom from the Ruby Ant Myrmica rubra and the Isolation of a Novel Insecticidal Decapeptide (2019) crossref
- Deciphering the Molecular Diversity of an Ant Venom Peptidome through a Venomics Approach (2018) crossref