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The actual health risk from exposure to combined mycotoxins is unknown, and few studies have focused on changes to cellular biological systems (e.g., metabolomics) caused by combined mycotoxic effects. To evaluate the combined mycotoxic effects of deoxynivalenol (DON) and zearalenone (ZEN) on the level of cellular biological systems, gas chromatographic, time-of-flight mass spectroscopy (GC-TOF/MS)...
M-superfamily conotoxins can be divided into four branches (M-1, M-2, M-3 and M-4) according to the number of amino acid residues in the third Cys loop. In general, it is widely accepted that the conotoxin signal peptides of each superfamily are strictly conserved. Recently, we cloned six cDNAs of novel M-superfamily conotoxins from Conus leopardus, Conus marmoreus and Conus quercinus, belonging to...
O-superfamily conotoxins include several families that have diverse pharmacological activity on Na + , K + or Ca 2+ channels. These superfamily toxins have been mainly found in fish-hunting and mollusk-hunting Conus species. Here, we reported two novel O-superfamily conotoxins, vx6a and vx6b, purified from a worm-hunting cone snail, Conus vexillum. Though their cysteine framework...
μ-Conotoxin SIIIA, a novel blocker of tetrodotoxin-resistant (TTX-R) voltage-gated sodium channels (VGSCs) has been identified from the fish-hunting cone snail, Conus striatus. The deduced sequence consists of a 20-residue signal peptide, a 31-residue pro-peptide, and a 20-residue mature toxin with its N-terminal Gln cyclized and C-terminus amidated. μ-SIIIA shares the common cysteine arrangement...
Remarkable sequence diversity of T-superfamily conotoxins was found in a mollusk-hunting cone snail Conus marmoreus. The sequence of mr5a purified from the snail venom was determined, while six other sequences of Mr5.1a, Mr5.1b, Mr5.2, Mr5.3, Mr5.4a, and Mr5.4b were deduced from their corresponding cDNA cloned by RACE approach. mr5a of 10 amino acid residues is one of the shortest T-superfamily conotoxins...
The full-length cDNAs of two A-superfamily conotoxins, κA-SIVA and α-SII, were respectively cloned and sequenced from Conus striatus using 3' RACE and 5' RACE. The cDNA of κA-SIVA encodes a precursor of 68 residues, including a signal peptide of 21 residues, a pro-peptide of 17 residues, and a mature peptide of 30 residues with an additional residue Gly which is prerequisite for the amidation of the...
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