食品科学
• 生物工程 • 上一篇 下一篇
林 洪,李 萌,王静雪*
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LIN Hong, LI Meng, WANG Jingxue*
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摘要:
为研究内溶素重组蛋白LysSTP4对沙门氏菌的抑菌性能,采用扩散法和浊度法探讨不同pH值、温度、离子强度等条件对其裂解稳定性的影响。结果表明,LysSTP4在pH 5~10和温度30~50 ℃的条件下均能保持较高的活性,在-80 ℃条件下保存6 个月仍有85%的残留酶活力,与膜通透剂乙二胺四乙酸(ethylenediaminetetraaceticacid,EDTA)协同作用能够有效抑制高浓度沙门氏菌的生长。
关键词: 沙门氏菌, 烈性噬菌体, 内溶素
Abstract:
In the present study, the recombinant endolysin from Salmonella-infecting bacteriophase STP4-a was characterized for its biochemical properties such as pH, temperature and iron concentration by the plate diffusion and turbidity methods. The results showed that the endolysin was stable over broad pH and temperature ranges and was active from pH 5.0 to 10 and from 30 to 50 ℃. After 6 months of storage at − 80 ℃, the activity of endolysin retained 85% of the original level. Ethylenediaminetetraacetic acid (EDTA) was used to increase outer membrane permeability, and it greatly enhanced the lytic activity of STP4-a endolysin.
Key words: Salmonella, lytic bacteriophage, endolysin
中图分类号:
TS254.5
林 洪,李 萌,王静雪*. 沙门氏菌噬菌体STP4-a重组内溶素抑菌特性分析[J]. 食品科学, doi: 10.7506/spkx1002-6630-201505020.
LIN Hong, LI Meng, WANG Jingxue*. Characterization of Recombinant Endolysin from a Salmonella-Infecting Bacteriophage STP4-a[J]. FOOD SCIENCE, doi: 10.7506/spkx1002-6630-201505020.
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链接本文: https://www.spkx.net.cn/CN/10.7506/spkx1002-6630-201505020
https://www.spkx.net.cn/CN/Y2015/V36/I5/104