Three venom toxins, neoverrucotoxin (neoVTX) α-subunit and β-subunit as well as verrucotoxin (VTX) β-subunit, were identified in the stonefish Synanceja verrucosa by SDS-PAGE, Native-PAGE and two-dimensional electrophoresis (2-DE) coupled with Matrix Assisted Laser Desorption Ionization-Quadrupole-Time-of-Flight (MALDI-Q-TOF). The venom estimated by Native-PAGE were 471, 358, 260 and 166 kDa. The predominate protein bands of crude venom were 84 and 75 kDa by SDS-PAGE. The crude venom protein fell in the region with pI values of 7-9 and molecular weights of 75-90 kDa by 2-DE. Peptide mass fingerprints (PMF) and MS/MS ions originated from MALDI-Q-TOF were used to identify the protein. Our results showed that the complete components of neoverrucotoxin (neoVTX) α-subunit and β-subunit as well as verrucotoxin (VTX) β-subunit were identified from SDS-PAGE and 2-DE patterns. Native-PAGE did not yield protein identifications but revealed the presence of protein complexes.
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Chen et al. (2015) studied this question.
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