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Updated: Jun 14, 2026

Extraction of Venom and Venom Gland Microdissections from Spiders for Proteomic and Transcriptomic Analyses

Extraction of Venom and Venom Gland Microdissections from Spiders for Proteomic and Transcriptomic Analyses

Published on: November 3, 2014

Proteomic analysis provides insights on venom processing in Conus textile.

Lemmuel L Tayo¹, Bingwen Lu, Lourdes J Cruz

¹School of Chemical Engineering and Chemistry, Mapua Institute of Technology, Muralla Street Intramuros, Manila 1002, Philippines.

Journal of Proteome Research

|March 26, 2010

Summary

Marine snails (Conus species) have specialized venom ducts that produce diverse conotoxins. Proteomics reveals distinct toxin profiles along the duct, aiding in hunting strategies and potential therapeutic development.

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Area of Science:

Marine Biology
Biochemistry
Proteomics

Background:

Conus species snails utilize a potent venom delivered via a harpoon-like tooth.
Conotoxins are known for potent neurological effects and therapeutic potential.

Purpose of the Study:

To investigate qualitative and quantitative differences in conotoxin components within the Conus textile venom duct.
To identify and characterize conotoxin sequences and post-translational modifications (PTMs).

Main Methods:

Mass-spectrometry based proteomics was employed.
Reversed-phase HPLC coupled with Orbitrap mass spectrometry was used.
SEQUEST and ProLuCID software analyzed the data.

Main Results:

31 conotoxin sequences and 25 PTM variants were identified.
King-Kong 2 peptide was the most abundant.
Several novel variants, including HyVal, were discovered.

Conclusions:

Specialization of venom duct sections suggests targeted conotoxin biosynthesis.
PTMs, alternative cleavage sites, and venom processing contribute to conopeptide diversity.
Proteomics accelerates discovery of Conus peptides and provides insights into envenomation.