|
Detection and preliminary characterization ofa narrow spectrum bacteriocin produced by Lactobacillus pentosus K2N7from Thai traditional fermented shrimp (Kung-Som) |
|---|---|
| รหัสดีโอไอ | |
| Creator | 1. Nisit Watthanasakphuban 2. Akio Tani 3. Soottawat Benjakul 4. Suppasil Maneerat |
| Title | Detection and preliminary characterization ofa narrow spectrum bacteriocin produced by Lactobacillus pentosus K2N7from Thai traditional fermented shrimp (Kung-Som) |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2559 |
| Journal Title | Songklanakarin Journal of Science and Technology (SJST) |
| Journal Vol. | 38 |
| Journal No. | 1 |
| Page no. | 47-55 |
| Keyword | bacteriocin,Kung-Som,fermented shrimp,narrow spectrum,Lactobacillus pentosus |
| ISSN | 0125-3395 |
| Abstract | A total of 48 lactic acid bacteria (LAB) exhibited antagonistic activity against Lactobacillus sakei subsp. sakei JCM1157 or Staphylococcus aureus DMST 8840. Only strain K2N7 was selected for characterization of bacteriocin activity. It wasidentified as Lactobacillus pentosus based on 16S rDNA analysis. The maximum bacteriocin production was detected inearly stationary phase of growth. It was found to be sensitive to proteolytic enzymes (trypsin, proteinase K, pronase E and?-chymotrypsin). The bacteriocin K2N7 was heat stable (2 h at 100?C) and retained activity over a wide pH range (2.0-12.0).Bacteriocin K2N7 has a narrow inhibitory spectrum restricted to genus Lactobacillus including Lactobacillus plantarumD6SM3, a bacterial strain known to cause overfermentation in Kung-Som. The peptide was purified by 60% ammoniumsulphate precipitation followed by sequential cation exchange chromatography and hydrophobic interaction characteristic.The molecular mass of bacteriocin K2N7 (2.017 kDa) was determined by matrix-assisted laser desorption/ionization time-offlightmass spectrometry analysis (MALDI-TOF MS). |
