Identification and characterization of the Vibrio anguillarum prtV gene encoding a new metalloprotease

Identification and characterization of the Vibrio anguillarum prtV gene encoding a new metalloprotease
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编码新金属蛋白酶的鳗弧菌 prtV 基因的鉴定和表征

DOI:
10.1007/s00343-010-9246-4
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发表时间:
2010-01
期刊:
中国海洋湖沼学报(英文版)
影响因子:
--
通讯作者:
Mao Yunxiang
Mao Yunxiang
中科院分区:
其他
文献类型:
--
作者:
Mo Zhaolan;Xiao Peng;Hao Bin;Zou Yuxia;Ye Xuhong;Guo Dongsheng;Mao Yunxiang

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克隆并测序了鳗弧菌M3株prtV样基因。该prtV基因编码918个氨基酸的推定蛋白,并且与霍乱弧菌prtV基因高度同源。我们发现,prtV插入突变株显示明胶琼脂上的明胶酶活性较低,对偶氮酪蛋白的蛋白酶活性较低,和四个糖苷酶活性较低。如通过API ZYM系统分析的,该prtV突变株还具有增加的其胞外产物中的两种酯酶的活性。此外,prtV突变株在大菱鲆肠粘液中表现出降低的生长和对大菱鲆红细胞的溶血活性。感染实验表明,与野生型相比,prtV突变株在大菱鲆鱼中的LD 50增加至少1个对数。我们认为prtV在鳗弧菌的致病过程中起重要作用。
We cloned and sequenced a prtV-like gene from Vibrio anguillarum M3 strain. This prtV gene encodes a putative protein of 918 amino acids, and is highly homologous to the V. cholerae prtV gene. We found that a prtV insertion mutant strain displayed lower gelatinase activity on gelatin agar, lower protease activity against azocasein, and lower activity for four glycosidases. This prtV mutant strain also had increased activity for two esterases in its extracellular products, as analyzed by the API ZYM system. In addition, the prtV mutant strain exhibited decreased growth in turbot intestinal mucus and reduced hemolytic activity on turbot erythrocytes. Infection experiments showed that the LD50 of the prtV mutant strain increased by at least 1 log compared to the wild-type in turbot fish. We propose that prtV plays an important role in the pathogenesis of V. anguillarum.
DOI: 10.1083/jcb.147.3.683
发表时间: 1999-11-01
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