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Updated: May 20, 2026
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Multi-Faceted Mass Spectrometric Investigation of Neuropeptides in Callinectes sapidus
Published on: May 31, 2022
Molecular phylogeny, classification and evolution of conopeptides.
N Puillandre1, D Koua, P Favreau
1Atheris Laboratories, Case postale 314, Bernex, 1233 Geneva, Switzerland. nicolas.puillandre@atheris.ch
Journal of Molecular Evolution
|July 5, 2012
Summary
Phylogenetic analysis of conopeptides reveals their current classification is valid but suggests cysteine content is not a relevant evolutionary marker. Some conopeptides may represent new superfamilies.
Area of Science:
- Marine Biology
- Biochemistry
- Evolutionary Biology
Background:
- Conopeptides are potent toxins from cone snails used in pharmacology.
- Current classification is based on signal sequences, assumed to reflect evolutionary relationships.
- The evolutionary relevance of this classification and conopeptide features like cysteine content is untested.
Purpose of the Study:
- To perform a phylogenetic analysis of conopeptide signal sequences.
- To test the hypothesis that signal sequence classification reflects evolutionary history.
- To investigate the phylogenetic relevance of cysteine content in conopeptide classification.
Main Methods:
- Phylogenetic analysis of 1,364 conopeptide signal sequences from GenBank.
- Comparison of sequence similarities and clustering patterns.
- Evaluation of cysteine patterns and pharmacological activities across superfamilies.
Main Results:
- The current superfamily classification is validated by phylogenetic analysis.
- Cysteine-rich and cysteine-poor conopeptides are closely related, challenging distinctions based on cysteine content.
- Pharmacological activities and cysteine patterns are observed across different superfamilies.
- Some conopeptides do not fit into existing superfamilies, suggesting new ones.
Conclusions:
- Conopeptide classification based on signal sequences is broadly supported, but cysteine content is not a reliable phylogenetic marker.
- The findings necessitate a re-evaluation of conopeptide classification and evolutionary history.
- A phylogenetically informed classification can aid in understanding conopeptide diversity and evolution in venomous animals.
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