Marine Biotechnology

, Volume 6, Issue 6, pp 633–641

Purification and Partial Identification of Novel Antimicrobial Protein from Marine Bacterium Pseudoalteromonas Species Strain X153

  • Arlette Longeon
  • Jean Peduzzi
  • Michel Barthelemy
  • Sophie Corre
  • Jean-Louis Nicolas
  • Michele Guyot
Article

DOI: 10.1007/s10126-004-3009-1

Cite this article as:
Longeon, A., Peduzzi, J., Barthelemy, M. et al. Mar Biotechnol (2004) 6: 633. doi:10.1007/s10126-004-3009-1

Abstract

A marine bacterium, X153, was isolated from a pebble collected at St. Anne du Portzic (France). By 16S ribosomal DNA gene sequence analysis, X153 strain was identified as a Pseudoalteromonas sp. close to P. piscicida. The crude culture of X153 was highly active against human pathogenic strains involved in dermatologic diseases, and marine bacteria including various ichthyopathogenic Vibrio strains. The active substance occurred both in bacterial cells and in culture supernatant. An antimicrobial protein was purified to homogeneity by a 4-step procedure using size-exclusion and ion-exchange chromatography. The highly purified P-153 protein is anionic, and sodium dodecylsulfate polyacrylamide gel electrophoresis gives an apparent molecular mass of 87 kDa. The X153 bacterium protected bivalve larvae against mortality, following experimental challenges with ichthyopathogenic Vibrio. Pseudoalteromonas sp. X153 may be useful in aquaculture as a probiotic bacterium.

Keywords

antimicrobial proteinPseudoalteromonasprobiotic bacteria

Copyright information

© Springer Science+Business Media, Inc. 2004

Authors and Affiliations

  • Arlette Longeon
    • 1
  • Jean Peduzzi
    • 1
  • Michel Barthelemy
    • 1
  • Sophie Corre
    • 2
  • Jean-Louis Nicolas
    • 3
  • Michele Guyot
    • 1
  1. 1.Laboratoire de Chimie et Biochimie des Substances NaturellesUMR 5154 CNRS, Museum National d’Histoire NaturelleParisFrance
  2. 2.Micromer Technopole Brest-IroiseBrestFrance
  3. 3.Laboratoire de Physiologie des InvertebresDRV, IFREMERPlouzaneFrance