A novel bacteriocin DY4-2 produced by Lactobacillus plantarum from cutlassfish and its application as bio-preservative for the control of Pseudomonas fluorescens in fresh turbot (Scophthalmus maximus) fillets

被引：60
作者：
Lv, Xinran [1 ,2 ]
Ma, Huanhuan [1 ]
Sun, Mengtong [1 ]
Lin, Yang [1 ]
Bai, Fengling [1 ]
Li, Jianrong [1 ]
Zhang, Bolin [2 ]
机构：
[1] Bohai Univ, Coll Food Sci & Engn, Natl & Local Joint Engn Res Ctr Storage Proc & Sa, Jinzhou 121013, Liaoning, Peoples R China
[2] Beijing Forestry Univ, Coll Biol Sci & Biotechnol, Beijing 100083, Peoples R China
来源：
FOOD CONTROL | 2018年 / 89卷
关键词：
Bacteriocin; Lactobacillus plantarum; Rio-preservative; Pseudomonas fluorescens; Turbot fillets; LACTIC-ACID BACTERIA; COLD-SMOKED SALMON; SHELF-LIFE; LISTERIA-MONOCYTOGENES; LACTOCOCCUS-LACTIS; ANTIMICROBIAL ACTIVITY; ENTEROCOCCUS-FAECIUM; RAINBOW-TROUT; PURIFICATION; FISH;
D O I：
10.1016/j.foodcont.2018.02.002
中图分类号：
TS2 [食品工业];
学科分类号：
0832 ;
摘要：
A novel bacteriocin DY4-2 was produced by strain DY4-2 which was isolated from cutlassfish (Trichiurus lepturus) and identified as Lactobacillus plantarum. This bacteriocin reached the maximum production at stationary phase after 24 h incubation. It was purified by ethyl acetate extraction followed by ultrafiltration, Sephadex G25 chromatography and high-performance liquid chromatography. The molecular mass of bacteriocin DY4-2 was determined as 1465 Da by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) analysis. The amino acid sequence of bacteriocin DY4-2 was predicted to be HAQIGMTMNGSFR by MALDI-TOF-MS/MS. Bacteriocin DY4-2 was heat-stable (30 min at 121 degrees C) and kept active at the pH range of 2.5-5.5, but was sensitive to proteolytic enzymes. The mode of action of bacteriocin DY4-2 was bactericidal. It exhibited broad spectrum antimicrobial activity against fish pathogenic and spoilage bacteria, such as Pseudomonas fluorescens, P. aeruginosa, Vibrio parahaemolyticus, Aeromonas sobria and Listeria monocytogenes. The addition of partially purified bacteriocin DY4-2 in turbot fillets reduced the number of P. fluorescens by 2.7 log units at 4 degrees C storage for 12 days. Moreover, compared to the control, a significant decline in total viable counts and total volatile base nitrogen was observed in bacteriocin DY4-2 treated samples. Theses results suggested that bacteriocin DY4-2 had potential to act as seafood bio-preservative. (C) 2018 Elsevier Ltd. All rights reserved.
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收藏
页码：22 / 31
页数：10
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