Abstract

Oral Sessions

Day 3, May 19(Fri.) 10:30-10:50 Room C (101)

Structural Determination of Antimicrobial Peptides from the Liocheles australasiae Scorpion Venom Using Combined De Novo Sequencing and Transcriptome Analysis

(1Kyoto Univ., 2Tokyo Univ. Agric.)
oMasahiro Miyashita1, Atsushi Kitanaka1, Ryota Okabe1, Hironobu Uchiyama2, Masayuki Sue2, Yoshiaki Nakagawa1, Hisashi Miyagawa1

Scorpion venom contains antimicrobial peptides in addition to neurotoxins. In this study, we searched for novel antimicrobial peptides from the Liocheles australasiae venom using combined mass spectrometric and transcriptomic analyses. We first separated the venom components by HPLC to obtain a fraction containing antimicrobial peptides. De novo sequencing analysis was performed for candidate peptides in this fraction to determine their partial sequences. Transcriptomic analysis of the venom grand was also performed using next-generation sequencing methods to obtain genetic information. A combination of these analyses allowed us to determine the sequence of three antimicrobial peptides, which was further confirmed by comparison with synthetic peptides.