1
|
Ma Y, Guo N, Li X, Jiang Z, Zhang D, Guo L, Wang Y. Development of an Efficient Recombinant Protein Expression System in Clostridium saccharoperbutylacetonicum Based on the Bacteriophage T7 System. ACS Synth Biol 2023; 12:3092-3105. [PMID: 37712503 DOI: 10.1021/acssynbio.3c00439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
Recombinant proteins have broad applications. However, there is a lack of a recombinant protein expression system specifically for large-scale production in anaerobic hosts. Here, we developed a powerful and stringently inducible protein expression system based on the bacteriophage T7 system in the strictly anaerobic solvent-producing Clostridium saccharoperbutylacetonicum. With the integration of a codon optimized T7 RNA polymerase into the chromosome, a single plasmid carrying a T7 promoter could efficiently drive high-level expression of the target gene in an orthogonal manner, which was tightly regulated by a lactose-inducible system. Furthermore, by deleting beta-galactosidase genes involved in lactose metabolism, the transcriptional strength was further improved. In the ultimately optimized strain TM-07, the transcriptional strength of the T7 promoter showed 9.5-fold increase compared to the endogenous strong promoter Pthl. The heterologous NADP+-dependent 3-hydroxybutyryl-CoA dehydrogenase (Hbd1) from C. kluyveri was expressed in TM-07, and the yield of the recombinant protein reached 30.4-42.4% of the total cellular protein, surpassing the strong protein expression systems in other Gram-positive bacteria. The relative activity of Hbd1 in the crude enzyme was 198.0 U/mg, which was 8.3-fold higher than the natural activity in C. kluyveri. The relative activity of the purified enzyme reached 467.4 U/mg. To the best of our knowledge, this study represents the first application of the T7 expression system in Clostridium species, and this optimized expression system holds great potential for large-scale endotoxin-free recombinant protein production under strictly anaerobic conditions. This development paves the way for significant advancements in biotechnology and opens up new avenues for industrial applications.
Collapse
Affiliation(s)
- Yuechao Ma
- Department of Biosystems Engineering, Auburn University, Auburn, Alabama 36849, United States
- Center for Bioenergy and Bioproducts, Auburn University, Auburn, Alabama 36849, United States
| | - Na Guo
- Department of Biosystems Engineering, Auburn University, Auburn, Alabama 36849, United States
- Center for Bioenergy and Bioproducts, Auburn University, Auburn, Alabama 36849, United States
| | - Xiao Li
- Department of Crop, Soil and Environmental Sciences, Auburn University, Auburn, Alabama 36849, United States
| | - Zhihua Jiang
- Department of Chemical Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - Dunhua Zhang
- Aquatic Animal Health Research Unit, Agricultural Research Service, USDA, Auburn, Alabama 36832, United States
| | - Liang Guo
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Yi Wang
- Department of Biosystems Engineering, Auburn University, Auburn, Alabama 36849, United States
- Center for Bioenergy and Bioproducts, Auburn University, Auburn, Alabama 36849, United States
| |
Collapse
|
2
|
Joseph RC, Kelley SQ, Kim NM, Sandoval NR. Metabolic Engineering and the Synthetic Biology Toolbox for
Clostridium. Metab Eng 2021. [DOI: 10.1002/9783527823468.ch16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|