A novel antimicrobial peptide from the loach, Misgurnus anguillicaudatus.

Abstract:

:A novel antimicrobial peptide, named misgurin, was isolated and characterized from the loach (mudfish), Misgurnus anguillicaudatus. The 21-amino-acid peptide with a molecular mass of 2502 Da was purified to homogeneity using a heparin-affinity column and C18 reverse-phase and gel-permeation high-performance liquid chromatography. The complete amino acid sequence of misgurin, which was determined by an automated amino acid sequencer, was Arg-Gln-Arg-Val-Glu-Glu-Leu-Ser-Lys-Phe-Ser-Lys-Lys-Gly-Ala-Ala-Ala-Arg- Arg-Arg-Lys. Misgurin is a strongly basic peptide which has 5 arginine and 4 lysine residues. Comparison of the amino acid sequence with those of other known antimicrobial peptides revealed that misgurin was a novel antimicrobial peptide. Misgurin showed a strong antimicrobial activity in vitro against a broad spectrum of microorganisms without significant hemolytic activity and was about 6 times more potent than magainin 2. Scanning electron microscopy confirmed that the peptide caused damage to the cell membrane by a pore-forming mechanism similar to that of magainin 2. This damage occurred at the minimal inhibition concentration (MIC), but at higher concentration than MIC it lysed the cell.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Park CB,Lee JH,Park IY,Kim MS,Kim SC

doi

10.1016/s0014-5793(97)00684-4

subject

Has Abstract

pub_date

1997-07-14 00:00:00

pages

173-8

issue

2-3

eissn

0014-5793

issn

1873-3468

pii

S0014-5793(97)00684-4

journal_volume

411

pub_type

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