SapT, a lanthionine-containing peptide involved in aerial hyphae formation in the streptomycetes

被引:74
作者
Kodani, S
Lodato, MA
Durrant, MC
Picart, F
Willey, JM [1 ]
机构
[1] Hofstra Univ, Dept Biol, Hempstead, NY 11549 USA
[2] Northumbria Univ, Sch Appl Sci, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, England
[3] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA
关键词
D O I
10.1111/j.1365-2958.2005.04921.x
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The developmentally complex soil microbe Streptomyces tendae secretes a hydrophobic peptide that restored to developmental mutants of S. coelicolor the ability to raise aerial hyphae. The S. tendae peptide, SapT, has a lantibiotic structure and molecular modelling predicts that it is amphiphilic, making it structurally and functionally similar to the SapB peptide produced by S. coelicolor. However, SapT, which bears three beta-methyl lanthionine bridges and one lanthionine bridge and demonstrated limited antibiotic activity, is distinct from SapB. The amphiphilic nature of both SapT and SapB is required for their ability to serve as biosurfactants facilitating the emergence of newly formed aerial hyphae. Remarkably, SapB and SapT, and the fungal hydrophobin SC3 were shown to restore to a SapB-deficient S. coelicolor mutant the capacity to undergo complete morphogenesis, such that the extracellular addition of protein resulted in sporulation. This suggests that the initiation of aerial growth may also indirectly trigger the signal transduction events needed for differentiation. These data imply that the production of morphogenetic peptides may be common among the streptomycetes, but that while their ability to function as biosurfactants is conserved, their specific lantibiotic structure is not. Finally, the identification of a second lanthionine-containing morphogenetic peptide suggests that lantibiotic structure and function may be more diverse than previously thought.
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页码:1368 / 1380
页数:13
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