Snake venomics: Characterization of protein families in Sistrurus barbouri venom by cysteine mapping, N‐terminal sequencing, and tandem mass spectrometry analysis
- 29 January 2004
- journal article
- research article
- Published by Wiley in Proteomics
- Vol. 4 (2) , 327-338
- https://doi.org/10.1002/pmic.200300628
Abstract
The protein composition of the crude venom of Sistrurus barbouri was analyzed by two-dimensional sodium dodecyl sulfate polyacrylamide gel electrophoresis. Proteins were separated by reversed phase high-performance liquid chromatography and characterized by N-terminal sequence analysis. The molecular mass and number of cysteine residues of the purified proteins were determined by matrix-associated laser desorption/ionization-time of flight mass spectrometry. Selected protein bands were subjected to in-gel tryptic digestion and peptide mass fingerprinting. Analysis of the tandem mass spectrometry spectra of selected doubly-charged peptide ions was done by collision-induced dissociation in a quadrupole-linear ion trap instrument. Our results show that the venom proteome of the pigmy rattlesnake S. barbouri is composed of proteins belonging to a few protein families, which can be structurally characterized by their disulfide bond contents.Keywords
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