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Wu W, Kang Y, Hou B, Ye J, Wang R, Wu H, Zhang H. Characterization of a TetR-Type positive regulator AtrA for lincomycin production in Streptomyces lincolnensis. Biosci Biotechnol Biochem 2023:7131442. [PMID: 37076767 DOI: 10.1093/bbb/zbad046] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
Abstract
AtrA belongs to the TetR family and has been well characterized for its roles in antibiotic biosynthesis regulation. Here, we identified an AtrA homolog (AtrA-lin) in Streptomyces lincolnensis. Disruption of atrA-lin resulted in reduced lincomycin production, whereas the complement restored the lincomycin production level to that of the wild-type. In addition, atrA-lin disruption did not affect cell growth, and morphological differentiation. Furthermore, atrA-lin disruption hindered the transcription of regulatory gene lmbU, structural genes lmbA and lmbW inside the lincomycin biosynthesis gene cluster, and two other regulatory genes, adpA and bldA. Completement of atrA-lin restored the transcription of these genes to varying degrees. Notably, we found that AtrA-lin directly binds to the promoter region of lmbU. Collectively, AtrA-lin positively modulated lincomycin production via both pathway-specific and global regulators. This study offers further insights into the functional diversity of AtrA homologs and the mechanism of lincomycin biosynthesis regulation.
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Affiliation(s)
- Wei Wu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Department of Applied Biology, East China University of Science and Technology, Shanghai, China
| | - Yajing Kang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Department of Applied Biology, East China University of Science and Technology, Shanghai, China
| | - Bingbing Hou
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Department of Applied Biology, East China University of Science and Technology, Shanghai, China
| | - Jiang Ye
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Department of Applied Biology, East China University of Science and Technology, Shanghai, China
| | - Ruida Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Department of Applied Biology, East China University of Science and Technology, Shanghai, China
| | - Haizhen Wu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Department of Applied Biology, East China University of Science and Technology, Shanghai, China
| | - Huizhan Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Department of Applied Biology, East China University of Science and Technology, Shanghai, China
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