| Full text | |
| Author(s): Show less - |
Lopes, Celine S. S.
;
Iwama, Rafael E.
;
Cortez, Thaina
;
Andrade, Sonia C. S.
;
Klompen, Anna M. L.
;
Audino, Jorge A.
;
Macrander, Jason
;
Reitzel, Adam M.
;
Nagata, Renato M.
;
Lanna, Emilio
;
Martinez, Lucas D.
;
Chagas, Barbara M.
;
Stampar, Sergio N.
Total Authors: 13
|
| Document type: | Journal article |
| Source: | TOXICON-X; v. 27, p. 13-pg., 2025-09-01. |
| Abstract | |
Ceriantharians synthesize and inoculate the toxins found in their stinging cells spread throughout the body. For most cnidarians the putative toxins profile can vary widely depending on the tissue function and the environmental conditions faced by these marine invertebrates. Extensive gene duplications events have impacted the diversity of the toxins system of cnidarians and could explain the rapid emergence of novel toxins. On the other hand, it seems for Ceriantharia, the putative toxins profile does not exhibit major variation, despite occupying different ecological niches. Some species of ceriantharians have a planktonic stage that is highly dispersive, while the benthic phase is characterized by semi-sessile polyp. However, the polyp builds a tube involving the entire column that can play an additional function by protecting against predators and competitors, which could decrease the need to synthesize a wide array of toxins. In the present study, we compare the putative toxins of the larva and polyp of Arachnanthus errans based on the functional annotations of the transcriptomes against annotated protein databases. We seek to understand the evolutionary process of two toxin-like protein families using phylogenetic reconstruction methods with target sequences of the transcriptome of nine ceriantharian species. Our exploration revealed that the larva expresses 70 more toxin-like genes than the polyp, which may relate to abiotic and biotic factors the larva experiences. Our phylogenetic analyses suggest duplication events may have occurred in both toxins-like proteins and the two copies of Kunitz-like proteins might have been present in the common ancestor of Ceriantharia. (AU) | |
| FAPESP's process: | 22/16193-1 - Biology, ecology and systematics of Sea-anemones lato sensu (Anthozoa, Actiniaria and Ceriantharia) in Atlantic Ocean |
| Grantee: | Sérgio Nascimento Stampar |
| Support Opportunities: | BIOTA-FAPESP Program - Regular Research Grants |
| FAPESP's process: | 17/50028-0 - Effects of diet and diel lighting on expression of venom diversity in two species of tube dwelling anemone |
| Grantee: | Sérgio Nascimento Stampar |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 19/03552-0 - Reproductive, behavioral and genomic patterns in Ceriantharia (Cnidaria): a step towards understanding marine evolution |
| Grantee: | Sérgio Nascimento Stampar |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 21/06738-8 - Seascape genetics and comparative genomics: an integrative evolutionary approach in marine invertebrates |
| Grantee: | Sónia Cristina da Silva Andrade |
| Support Opportunities: | BIOTA-FAPESP Program - Young Investigators Grants - Phase 2 |