Proteases in Escherichia coli and Staphylococcus aureus confer reduced susceptibility to lactoferricin B.

Proteases in Escherichia coli and Staphylococcus aureus confer reduced susceptibility to lactoferricin B.
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大肠杆菌和金黄色葡萄球菌中的蛋白酶可降低对乳铁素 B 的敏感性。

DOI:
10.1093/jac/dkf156
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发表时间:
2002
期刊:
The Journal of antimicrobial chemotherapy
影响因子:
--
通讯作者:
L. Vorland
L. Vorland
中科院分区:
--
文献类型:
--
作者:
Hilde Ulvatne;H. Haukland;Ørjan Samuelsen;M. Krämer;L. Vorland

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乳铁蛋白素B是一种来源于牛乳铁蛋白N-末端部分的阳离子抗菌肽。采用不同的蛋白酶抑制剂和蛋白酶缺陷型大肠杆菌(Escherichia coli)和金黄色葡萄球菌(Staphylococcus aureus),研究了细菌蛋白酶对乳铁蛋白素B(Lactoferricin B)抗菌活性的影响。coli突变体。金属蛋白酶抑制剂EDTA钠是两种植物中最有效的抑制剂,但EDTA钠与其他类型的蛋白酶抑制剂联合使用具有协同作用。结果表明,两株大肠杆菌对乳铁蛋白B的抗性均与几组蛋白酶有关。coli和革兰氏阳性菌S.金黄色。我们还报道了热休克诱导的丝氨酸蛋白酶DegP的基因失活增加了大肠杆菌对乳铁蛋白素B的敏感性。大肠杆菌中,表明该蛋白酶至少与降低的对乳铁蛋白素B的敏感性有关。
Lactoferricin B is a cationic antimicrobial peptide derived from the N-terminal part of bovine lactoferrin. The effect of bacterial proteases on the antibacterial activity of lactoferricin B towards Escherichia coli and Staphylococcus aureus was investigated using various protease inhibitors and protease-deficient E. coli mutants. Sodium-EDTA, a metalloprotease inhibitor, was the most efficient inhibitors in both species, but combinations of sodium-EDTA with other types of protease inhibitor gave a synergic effect. The results indicate that several groups of proteases are involved in resistance to lactoferricin B in both E. coli and S. aureus. We also report that genetic inactivation of the heat shock-induced serine protease DegP increased the susceptibility to lactoferricin B in E. coli, suggesting that this protease, at least, is involved in reduced susceptibility to lactoferricin B.
DOI: 10.1073/pnas.89.24.11939
发表时间: 1992-12-15
影响因子: 11.1
作者:
GROISMAN, EA;PARRALOPEZ, C;HEFFRON, F
通讯作者: HEFFRON, F
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DOI: 10.1099/00221287-134-5-1355
发表时间: 1988
期刊: Journal of general microbiology
影响因子: --
作者:
Elish,ME;Pierce,JR;Earhart,CF
通讯作者: Earhart,CF