iTRAQ-based proteomic analysis of Bacillus subtilis strain NCD-2 regulated by PhoPR two-component system: A comparative analysis with transcriptomics revealed the regulation for fengycin production by branched chain amino acids
文献类型: 外文期刊
作者: Fu, Yifan 1 ; Guo, Qinggang 2 ; Dong, Lihong 2 ; Liu, Xiaomeng 2 ; Chen, Xiuye 2 ; Wang, Peipei 2 ; Su, Zhenhe 2 ; Ma, Ping 2 ;
作者机构: 1.Agr Univ Hebei, Coll Plant Protect, Baoding 071000, Peoples R China
2.Hebei Acad Agr & Forestry Sci, Inst Plant Protect, Integrated Pest Management Ctr Hebei Prov, Key Lab IPM Crops Northern Reg North China, Baoding 071000, Peoples R China
关键词: ITRAQ; Proteomics; Bacillus subtilis; Two-component system; Fengycin
期刊名称:MICROBIOLOGICAL RESEARCH ( 影响因子:5.07; 五年影响因子:7.103 )
ISSN: 0944-5013
年卷期: 2022 年 260 卷
页码:
收录情况: SCI
摘要: The PhoPR two-component system (TCS) is a signal transduction pathway to regulate the phosphate starvation response in Bacillus subtilis and regulated fengycin production in strain NCD-2 under low phosphate condition. The purpose of this study was to characterize the proteome level responses in the phoP-null mutant (MP) and the phoR-null mutant (MR), and to integrate the proteomics with the transcriptomic data obtained previously. The metabolic pathway for fengycin was predicted based on omics analysis as well as molecular genetics assay. Results showed the proteins and genes associated with biosynthesis of branched chain amino acids (BCAAs) were regulated by PhoPR TCS, and liquid chromatography mass spectrometry (LC-MS) analysis also confirmed that the production of BCAAs was down-regulated in the MP and MR mutants, when compared to wild-type strain NCD-2. Protein network analysis showed that the BCAA metabolism was linked to the biosynthesis of lipopeptides. The MP and MR strains decreased the fengycin production when cultured in modified Landy medium supplied with 0.42 mM phosphate, however, the fengycin production could be restored when the glutamic acid was replaced with BCAAs that were added to modified Landy medium. The lpdV gene, which is responsible for the BCAA degradation process, was deleted in strain NCD-2. Compared with the wild-type strain, the lpdV mutant produced significantly less fengycin in the medium supplied with BCAAs. Considered together, the results of this study indicate that the PhoPR TCS regulates fengycin production by affecting BCAA biosynthesis.
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