Isolation and sequence determination of peptides in the venom of the spider wasp ( Cyphononyx dorsalis) guided by matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) mass spectrometry

• Published in: Toxicon (Oxford) Vol. 39; no. 8; pp. 1257 - 1260
• Main Authors: Konno, Katsuhiro, Hisada, Miki, Naoki, Hideo, Itagaki, Yasuhiro, Yasuhara, Tadashi, Juliano, Maria Aparecida, Juliano, Luiz, Palma, Mario Sergio, Yamane, Tetsuo, Nakajima, Terumi
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.08.2001; Elsevier Science
• Subjects: Amino Acid Sequence; Animal poisons toxicology. Antivenoms; Animals; Biological and medical sciences; Cyphononyx dorsalis; Female; Mass Spectrometry; Medical sciences; Molecular Sequence Data; Pompilidae; Toxicology; Wasp Venoms - chemistry; Wasp Venoms - isolation & purification; Peptides; Molecular structure; Insecta; Animal origin; Pompilidae; Laser desorption; Matrix isolation; Photoionization; Time of flight method; Arthropoda; Venom; Vespidae; Isolation; Hymenoptera; Invertebrata; Mass spectrometry; Aminoacid sequence; Vespa; Aculeata; Structural analysis
• ISSN: 0041-0101; 1879-3150
• DOI: 10.1016/S0041-0101(00)00262-2

Micro-scale (sub-pmol) isolation and sequence determination of three peptides from the venom of the solitary spider wasp Cyphononyx dorsalis is described. We isolated two novel peptides Cd-125 and Cd-146 and a known peptide Thr 6-bradykinin from only two venom sacs of solitary spider wasp Cyphononyx dorsalis without bioassay-guided fractionation, but instead guided by MALDI-TOF MS. The MALDI-TOF MS analysis of each fraction showed the purity and molecular weight of the components, which led to the isolation of the peptides virtually without loss of sample amount. The sequences of the novel peptides Cd-125 (Asp-Thr-Ala-Arg-Leu-Lys-Trp-His) and Cd-146 (Ser-Glu-Thr-Gly-Asn-Thr-Val-Thr-Val-Lys-Gly-Phe-Ser-Pro-Leu-Arg) were determined by Edman degradation together with mass spectrometry, and finally corroborated by solid-phase synthesis. The known peptide Thr 6-bradykinin (Arg-Pro-Pro-Gly-Phe-Thr-Pro-Phe-Arg) was identified by comparison with the synthetic authentic specimen. This is the first example for any kinins to be found in Pompilidae wasp venoms. The procedure reported here can be applicable to studies on many other components of solitary wasp venoms with limited sample availability.