期刊
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
卷 23, 期 23, 页码 -出版社
MDPI
DOI: 10.3390/ijms232314792
关键词
Streptomyces; antibiotics; nitrogen stress; cell wall stress; osmotic stress; proteomics; label-free protein quantification
资金
- Centre National de la Recherche Scientifique CNRS [ANR-17-ASTR-0018]
- IBiSA, Ile de France Region
- Plan Cancer, CNRS
- Paris-Saclay University
In this study, the growth and transcriptional/regulatory protein profiles of Streptomyces coelicolor and Streptomyces lividans were compared under conditions of phosphate limitation or proficiency. It was found that these two strains differ significantly in their ability to produce bioactive specialized metabolites. The study also revealed that S. coelicolor is subjected to nitrogen stress, which is closely linked to cell wall stress and osmotic stress. The intensification of these stresses leads to an increase in antibiotic biosynthesis.
Streptomyces coelicolor and Streptomyces lividans constitute model strains to study the regulation of antibiotics biosynthesis in Streptomyces species since these closely related strains possess the same pathways directing the biosynthesis of various antibiotics but only S. coelicolor produces them. To get a better understanding of the origin of the contrasted abilities of these strains to produce bioactive specialized metabolites, these strains were grown in conditions of phosphate limitation or proficiency and a comparative analysis of their transcriptional/regulatory proteins was carried out. The abundance of the vast majority of the 355 proteins detected greatly differed between these two strains and responded differently to phosphate availability. This study confirmed, consistently with previous studies, that S. coelicolor suffers from nitrogen stress. This stress likely triggers the degradation of the nitrogen-rich peptidoglycan cell wall in order to recycle nitrogen present in its constituents, resulting in cell wall stress. When an altered cell wall is unable to fulfill its osmo-protective function, the bacteria also suffer from osmotic stress. This study thus revealed that these three stresses are intimately linked in S. coelicolor. The aggravation of these stresses leading to an increase of antibiotic biosynthesis, the connection between these stresses, and antibiotic production are discussed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据