食品科学

• 生物工程 • 上一篇    下一篇

金黄色葡萄球菌噬菌体不敏感菌株的分离以及噬菌体JS01吸附位点的研究

贾静静,史 锋,王利平,王小元   

  1. 1.江南大学 食品科学与技术国家重点实验室,江苏 无锡 214122;
    2.江南大学 工业生物技术教育部重点实验室,江苏 无锡 214122
  • 出版日期:2013-06-15 发布日期:2013-06-03

Isolation of Staphylococcus aureus Bacteriophage-insensitive Mutant ATCC25923R and Adsorption Site of Phage JS01

JIA Jing-jing,SHI Feng,WANG Li-ping,WANG Xiao-yuan   

  1. 1. State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China;
    2. Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
  • Online:2013-06-15 Published:2013-06-03

摘要:

用噬菌体JS01特异性裂解金黄色葡萄球菌ATCC25923后,出现了噬菌体不敏感菌株ATCC25923R。为了解两株细菌对噬菌体JS01敏感性差异的原因并确定JS01作用于ATCC25923的受体位点,采用气相色谱-质谱联用法分析细胞表面磷壁酸的结构并测试相关试剂对JS01裂解能力的影响。ATCC25923R的菌落形态比敏感菌株ATCC25923更光滑,颜色更深。当JS01在ATCC25923菌液中作用1h后,OD600nm值由1.0降低到0.2;当作用于ATCC25923R时,OD600nm值持续上升。ATCC25923和ATCC25923R细胞表面的磷壁酸结构存在微弱差异,ATCC25923R磷壁酸结构中多一种戊糖组分。在葡萄糖、N-乙酰葡萄糖胺(GlcNAc)、磷壁酸3种试剂中,只有GlcNAc会导致噬菌体JS01的裂解能力下降,证实GlcNAc为噬菌体JS01裂解ATCC25923时的吸附位点。

关键词: 金黄色葡萄球菌, 噬菌体, 不敏感菌株, 磷壁酸, 吸附位点

Abstract:

The lysis of Staphylococcus aureus ATCC25923 by phage JS01 gave rise to a bacteriophage-insensitive mutant
(BIM, ATCC25923R). In order to understand the different sensitivity of ATCC25923 and ATCC25923R towards phage
JS01 as well as to determine the phage JS01 adsorption site on the cell surface of ATCC25923, the structures of teichoic
acids in these strains were analyzed by gas chromatography-mass spectrometry (GC-MS) and the effect of some reagents on
phage lysis was analyzed. ATCC25923R showed smooth colony with dark color when compared with ATCC25923. After
challenged with JS01, the OD600nm value of ATCC25923 culture decreased from 1.0 to 0.2 in 1 h, while the OD600nm value
of ATCC25923R culture increased continuously. A pentose component appeared in the teichoic acid of ATCC25923R,
but not in that of ATCC25923. Among glucose, N-acetylglucosamine (GlcNAc), and teichoic acid from ATCC25923 and
ATCC25923R, only GlcNAc could reduce the ability of JS01 to lyse ATCC25923, indicating that GlcNAc is the JS01
adsorption site on ATCC25923.

Key words: Staphylococcus aureus, bacteriophage, bacteriophage-insensitive mutants, teichoic acid, adsorption site