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Toxins 2018, 10(9), 373;

Proteomic Deep Mining the Venom of the Red-Headed Krait, Bungarus flaviceps

Fundação Oswaldo Cruz-Ceará, Rua São José, 2º Pavimento, Precabura, Eusébio 61760-000, Brazil
Laboratório de Toxinologia, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro 21045-900, Brazil
Computational Mass Spectrometry& Proteomics Group, Carlos Chagas Institute, Fiocruz, Paraná 81350-010, Brazil
Department of Biology, Stetson University, 421 N. Woodland Blvd, DeLand, FL 32723, USA
Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore 117543, Singapore
School of Biological Sciences, University of Northern Colorado, 501 20th St., CB 92, Greeley, CO 80639-0017, USA
Authors to whom correspondence should be addressed.
Received: 13 June 2018 / Revised: 28 August 2018 / Accepted: 1 September 2018 / Published: 13 September 2018
(This article belongs to the Section Animal Venoms)
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The use of -omics technologies allows for the characterization of snake venom composition at a fast rate and at high levels of detail. In the present study, we investigated the protein content of Red-headed Krait (Bungarus flaviceps) venom. This analysis revealed a high diversity of snake venom protein families, as evidenced by high-throughput mass spectrometric analysis. We found all six venom protein families previously reported in a transcriptome study of the venom gland of B. flaviceps, including phospholipases A2 (PLA2s), Kunitz-type serine proteinase inhibitors (KSPIs), three-finger toxins (3FTxs), cysteine-rich secretory proteins (CRISPs), snaclecs, and natriuretic peptides. A combined approach of automated database searches and de novo sequencing of tandem mass spectra, followed by sequence similarity searches, revealed the presence of 12 additional toxin families. De novo sequencing alone was able to identify 58 additional peptides, and this approach contributed significantly to the comprehensive description of the venom. Abundant protein families comprise 3FTxs (22.3%), KSPIs (19%), acetylcholinesterases (12.6%), PLA2s (11.9%), venom endothelial growth factors (VEGFs, 8.4%), nucleotidases (4.3%), and C-type lectin-like proteins (snaclecs, 3.3%); an additional 11 toxin families are present at significantly lower concentrations, including complement depleting factors, a family not previously detected in Bungarus venoms. The utility of a multifaceted approach toward unraveling the proteome of snake venoms, employed here, allowed detection of even minor venom components. This more in-depth knowledge of the composition of B. flaviceps venom facilitates a better understanding of snake venom molecular evolution, in turn contributing to more effective treatment of krait bites. View Full-Text
Keywords: Bungarus flaviceps; enzymes; Red-headed Krait; snake venom; toxins; proteome Bungarus flaviceps; enzymes; Red-headed Krait; snake venom; toxins; proteome

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Chapeaurouge, A.; Silva, A.; Carvalho, P.; McCleary, R.J.R.; Modahl, C.M.; Perales, J.; Kini, R.M.; Mackessy, S.P. Proteomic Deep Mining the Venom of the Red-Headed Krait, Bungarus flaviceps. Toxins 2018, 10, 373.

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