| Literature DB >> 16087274 |
Da Yu1, Zonggen Sheng, Xueqing Xu, Jianxu Li, Hailong Yang, Zhigang Liu, Huw H Rees, Ren Lai.
Abstract
A novel antimicrobial peptide named as ixosin was isolated from the salivary glands of the hard tick, Ixodes sinensis, by gel filtration, ion exchange chromatography and reverse-phase high-performance liquid chromatography (RP-HPLC). Its amino acid sequence was determined as GLHKVMREVLGYERNSYKKFFLR by Edman degradation and its molecular weight was 2870.5 analyzed by fast atom bombardment (FAB) mass spectrometry. This is the first antimicrobial peptide from ticks that lacks cysteine in its primary structure. The cDNA encoding ixosin was cloned by cDNA library screening. The predicted protein from the cDNA sequence composed of 79 amino acids including mature ixosin. Purified ixosin exerted its antimicrobial activities against bacteria and fungi. No similarity was found by BLAST search to any database entries and, thus, our findings describe a novel antimicrobial peptide.Entities:
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Year: 2005 PMID： 16087274 DOI： 10.1016/j.peptides.2005.06.020
Source DB: PubMed Journal: Peptides ISSN： 0196-9781 Impact factor: 3.750