A cDNA encoding a subunit of the verrucotoxin (VTX) has been identified from a cDNA library derived from stonefish venom glands. It encodes a polypeptide of 708 amino-acid residues, followed by a 3'-untranslated region of 895 bp long. The ORF contains the complete mature sequence of the β-subunit of the VTX, as inferred from both the presence of an identical N-terminus sequence and 96% homology among the 506 amino terminus residues found in the partial sequence of the β-subunit of the stonustoxin from Synanceia horrida (Ghadessy, F.J., Jeyaseelan, K., Chung, M.C.M., Khoo, H.E. and Yuen, R. (1994) Toxicon 32, 1684-1688). Upstream the mature sequence, we noticed the presence of an incomplete peptide of a 13 amino acids, whose unusual primary structure supports the idea of the existence of a propeptide and/or of a new secretion signal.
|Number of pages||5|
|Journal||Biochimica et Biophysica Acta - Protein Structure and Molecular Enzymology|
|Publication status||Published - 1997 Jan 4|
- Stonefish venom
ASJC Scopus subject areas
- Structural Biology
- Molecular Biology