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Analysis of Rhodopsin G Protein-Coupled Receptor Orthologs Reveals Semiochemical Peptides for Parasite (Schistosoma Mansoni) and Host (Biomphalaria Glabrata) Interplay3.34 MB
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Preprint
Analysis of Rhodopsin G Protein-Coupled Receptor Orthologs Reveals Semiochemical Peptides for Parasite (Schistosoma Mansoni) and Host (Biomphalaria Glabrata) Interplay
Research Square, Vol.21 February 2022, pp.1-23
Research Square Company
2021
Abstract
Background: Schistosomiasis is a medically significant disease caused by helminth parasites of the genus Schistosoma. The schistosome life cycle requires chemically mediated interactions with an intermediate (aquatic snail) and definitive (human) host. Blocking parasite development within the snail stage requires improved understanding of the interactions between the snail host and the Schistosoma water-borne free-living form (miracidium). Innovations in snail genomics and aquatic chemical communication provide an ideal opportunity to explore snail-parasite coevolution at the molecular level. Rhodopsin G protein-coupled receptors (GPCRs) are of particular interest in studying how trematode parasites navigate towards their snail hosts. The potential role of GPCRs in parasites makes them candidate targets for new antihelminthics that disrupt the intermediate host life-cycle stages, thus preventing subsequent human infections.
Results: A genomic-bioinformatic approach was used to identify GPCR orthologs between the snail Biomphalaria glabrata and miracidia of its obligate parasite Schistosoma mansoni. We show that 8 S. mansoni rhodopsin GPCRs expressed within the miracidial stage share overall amino acid similarity with 8 different B. glabrata rhodopsin GPCRs, particularly within transmembrane domains, suggesting conserved structural features. These GPCRs include an orphan peptide receptor as well as several with strong sequence homologies with rhabdomeric opsin receptors, a serotonin receptor, a sulfakinin (SK) receptor, an allatostatin-A (buccalin) receptor and an FMRFamide receptor. Buccalin and FMRFa peptides were identified in water conditioned by B. glabrata, and we show synthetic buccalin and FMRFa can stimulate significant rates of change of direction and turn-back responses in S. mansoni miracidia.
Conclusions: Ortholog GPCRs were identified in S. mansoni miracidia and B. glabrata. These GPCRs may detect similar ligands, including snail-derived odorants that could facilitate miracidial host finding. These results lay the foundation for future research elucidating the mechanisms by which GPCRs mediate host finding which can lead to the potential development of novel anti-schistosome interventions.
Details
- Title
- Analysis of Rhodopsin G Protein-Coupled Receptor Orthologs Reveals Semiochemical Peptides for Parasite (Schistosoma Mansoni) and Host (Biomphalaria Glabrata) Interplay
- Authors
- Phong Phan (Author) - University of the Sunshine Coast, Queensland, GeneCology Research Centre - LegacyDi Liang (Author) - University of the Sunshine Coast, Queensland, GeneCology Research Centre - LegacyMin Zhao (Author) - University of the Sunshine Coast, Queensland, GeneCology Research Centre - LegacyConor Fogarty (Author) - University of the Sunshine Coast, Queensland, GeneCology Research Centre - LegacyTianfang Wang (Author) - University of the Sunshine Coast, Queensland, GeneCology Research Centre - LegacyScott Cummins (Author) - University of the Sunshine Coast, Queensland, School of Science, Technology and EngineeringMary G Duke (Author) - QIMR Berghofer Medical Research InstituteDonald P McManus (Author) - QIMR Berghofer Medical Research Institute
- Publication details
- Research Square, Vol.21 February 2022, pp.1-23
- Publisher
- Research Square Company
- Date published
- 2021
- DOI
- 10.21203/rs.3.rs-1194469/v1
- ISSN
- 2693-5015
- Copyright note
- License: (c) This work is licensed under a Creative Commons Attribution 4.0 International License.
- Organisation Unit
- University of the Sunshine Coast, Queensland; GeneCology Research Centre - Legacy; Cancer Research Cluster; School of Science, Technology and Engineering; Centre for Bioinnovation
- Language
- English
- Record Identifier
- 99605107102621
- Output Type
- Preprint
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