Conus Peptides: Phylogenetic Range of Biological Activity

Area of Science:

• Neuroscience
• Pharmacology
• Evolutionary Biology

Background:

• Marine snails of the genus Conus (cone snails) possess venom that primarily paralyzes prey.
• Previous research indicated Conus venom peptides (conopeptides) exhibit limited activity on homologous targets in distantly related species.
• The phylogenetic specificity of conopeptides remains an area requiring further investigation.

Purpose of the Study:

• To investigate whether conopeptides from Conus textile exhibit cross-phylum biological activity.
• To explore the potential of conopeptides as tools for studying the evolution of receptors, ion channels, and nervous systems.

Main Methods:

• Purification of peptides from Conus textile venom.
• Assaying the biological activity of purified peptides using a mammalian central nervous system (CNS) model.
• Surveying venom fractions for additional components with cross-phylum activity.

Main Results:

• A 23-amino acid convulsant peptide with potent activity in the mammalian CNS was isolated from Conus textile venom.
• Conus textile venom, despite originating from a mollusk-hunting species, contains components with significant cross-phylum activity.
• Multiple other components within the venom fractions are predicted to exhibit similar broad phylogenetic specificity.

Conclusions:

• Conopeptides can possess potent biological activity across different phyla, challenging previous assumptions of limited cross-species efficacy.
• The identified convulsant peptide from Conus textile demonstrates that even specialized venoms can yield broadly active compounds.
• Conopeptides with broad phylogenetic specificity represent valuable pharmacological tools for comparative studies in neurobiology and evolutionary research.