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Peptide and protein pheromones in molluscs
Abraham J Susswein1, Gregg T Nagle
1Faculty of Life Sciences, and the Leslie and Susan Gonda (Goldschmied) Multidisciplinary Brain Research Center, Bar-Ilan University, Ramat Gan 52900, Israel. avy@mail.biu.ac.il
Peptides
|September 18, 2004
Summary
Few peptide pheromones are known in molluscs. This study characterizes attractins in Aplysia, a tetrapeptide (ILME) in Sepia, and Sepia sperm-attracting peptide (SepSAP) involved in reproduction.
Area of Science:
- Marine Biology
- Chemical Ecology
- Invertebrate Zoology
Background:
- Pheromones regulate diverse behaviors in molluscs, yet characterized peptide pheromones remain scarce.
- Reproductive behaviors in molluscs are influenced by chemical cues, highlighting the need for identifying specific pheromonal compounds.
Purpose of the Study:
- To review and characterize known peptide pheromones in molluscs.
- To elucidate the roles of specific peptide pheromones in Aplysia and Sepia reproductive processes.
Main Methods:
- Literature review and characterization of identified peptide pheromones.
- Analysis of peptide structures and their release mechanisms during reproductive events.
Main Results:
- Identification of attractins, a family of water-borne peptide pheromonal attractants in Aplysia, released during egg laying to promote aggregations.
- Characterization of a tetrapeptide (ILME) in Sepia, eluting from egg masses and potentially aiding oocyte transport.
- Discovery of Sepia sperm-attracting peptide (SepSAP; PIDPGVamide), released by oocytes to facilitate external fertilization.
Conclusions:
- Peptide pheromones play crucial roles in mediating reproductive behaviors in diverse mollusc species.
- The characterized pheromones (attractins, ILME, SepSAP) offer insights into chemical communication and fertilization strategies in marine invertebrates.
- Further research into mollusc pheromones can advance understanding of their reproductive biology and ecological interactions.