Insights into the mode of action of the two-peptide lantibiotic haloduracin.
Insights into the mode of action of the two-peptide lantibiotic haloduracin.
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DOI:
10.1021/cb900194x
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发表时间:
2009-10-16
影响因子:
4
通讯作者:
van der Donk, Wilfred A.
中科院分区:
文献类型:
--
作者:
Oman, Trent J.;van der Donk, Wilfred A.
Haloduracin, a recently discovered two-peptide lantibiotic composed of the post-translationally modified peptides Halα and Halβ, is shown to have high potency against a range of Gram-positive bacteria and to inhibit spore outgrowth of Bacillus anthracis. The two peptides display optimal activity in a 1:1 stoichiometry and have efficacy similar to that of the commercially used lantibiotic nisin. However, haloduracin is more stable at pH 7 than nisin. Despite significant structural differences between the two peptides of haloduracin and those of the two-peptide lantibiotic lacticin 3147, these two systems show similarities in their mode of action. Like Ltnα, Halα binds to a target on the surface of Gram-positive bacteria, and like Ltnβ, the addition of Halβ results in pore formation and potassium efflux. Using Halα mutants, its B- and C-thioether rings are shown to be important but not required for bioactivity. A similar observation was made with mutants of Glu22, a residue that is highly conserved among several lipid II-binding lantibiotics such as mersacidin.
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影响因子:
3.6
作者:
Brötz, H;Josten, M;Sahl, HG
通讯作者:
Sahl, HG
影响因子:
4.4
作者:
Mazzotta, AS;Crandall, AD;Montville, TJ
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影响因子:
3.3
作者:
CHATTERJEE, S;CHATTERJEE, S;KOGLER, H
通讯作者:
KOGLER, H
影响因子:
2.9
作者:
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Vederas, JC
影响因子:
4.4
作者:
Bierbaum, G;Szekat, C;Sahl, HG
通讯作者:
Sahl, HG