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Chen Y, Huang L, Yu T, Yao Y, Zhao M, Pang A, Zhou J, Zhang B, Liu Z, Zheng Y. Balancing the AspC and AspA Pathways of Escherichia coli by Systematic Metabolic Engineering Strategy for High-Efficient l-Homoserine Production. ACS Synth Biol 2024; 13:2457-2469. [PMID: 39042380 DOI: 10.1021/acssynbio.4c00208] [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: 07/24/2024]
Abstract
l-Homoserine is a promising C4 platform compound used in the agricultural, cosmetic, and pharmaceutical industries. Numerous works have been conducted to engineer Escherichia coli to be an excellent l-homoserine producer, but it is still unable to meet the industrial-scale demand. Herein, we successfully engineered a plasmid-free and noninducible E. coli strain with highly efficient l-homoserine production through balancing AspC and AspA synthesis pathways. First, an initial strain was constructed by increasing the accumulation of the precursor oxaloacetate and attenuating the organic acid synthesis pathway. To remodel the carbon flux toward l-aspartate, a balanced route prone to high yield based on TCA intensity regulation was designed. Subsequently, the main synthetic pathway and the cofactor system were strengthened to reinforce the l-homoserine synthesis. Ultimately, under two-stage DO control, strain HSY43 showed 125.07 g/L l-homoserine production in a 5 L fermenter in 60 h, with a yield of 0.62 g/g glucose and a productivity of 2.08 g/L/h. The titer, yield, and productivity surpassed the highest reported levels for plasmid-free strains in the literature. The strategies adopted in this study can be applied to the production of other l-aspartate family amino acids.
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Affiliation(s)
- Yuanyuan Chen
- The National and Local Joint Engineering Research Center for Biomanufacturing of Choral Chemicals, Zhejiang University of Technology, Hangzhou 310014, PR China
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Lianggang Huang
- The National and Local Joint Engineering Research Center for Biomanufacturing of Choral Chemicals, Zhejiang University of Technology, Hangzhou 310014, PR China
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Tao Yu
- The National and Local Joint Engineering Research Center for Biomanufacturing of Choral Chemicals, Zhejiang University of Technology, Hangzhou 310014, PR China
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Yuan Yao
- The National and Local Joint Engineering Research Center for Biomanufacturing of Choral Chemicals, Zhejiang University of Technology, Hangzhou 310014, PR China
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Mingming Zhao
- The National and Local Joint Engineering Research Center for Biomanufacturing of Choral Chemicals, Zhejiang University of Technology, Hangzhou 310014, PR China
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Aiping Pang
- The National and Local Joint Engineering Research Center for Biomanufacturing of Choral Chemicals, Zhejiang University of Technology, Hangzhou 310014, PR China
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Junping Zhou
- The National and Local Joint Engineering Research Center for Biomanufacturing of Choral Chemicals, Zhejiang University of Technology, Hangzhou 310014, PR China
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Bo Zhang
- The National and Local Joint Engineering Research Center for Biomanufacturing of Choral Chemicals, Zhejiang University of Technology, Hangzhou 310014, PR China
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Zhiqiang Liu
- The National and Local Joint Engineering Research Center for Biomanufacturing of Choral Chemicals, Zhejiang University of Technology, Hangzhou 310014, PR China
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Yuguo Zheng
- The National and Local Joint Engineering Research Center for Biomanufacturing of Choral Chemicals, Zhejiang University of Technology, Hangzhou 310014, PR China
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, PR China
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Gamidi RK, Dandawate M, Tothadi S, Choudhury R, Nangia AK, Reddy DS. Separation of a diastereomeric diol pair using the mechanical properties of crystals. CrystEngComm 2021. [DOI: 10.1039/d1ce01055g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The visually indistinguishable acicular crystals of a (2S,3R/S)-3-ethyl-1-phenylhex-5-ene-2,3-diol (ephd) diastereomeric pair are separated via the mechanical response based on elastic (2S,3R, right) and brittle (2S,3S, left) crystals.
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Affiliation(s)
- Rama Krishna Gamidi
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
| | - Monica Dandawate
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
| | - Srinu Tothadi
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
| | - Rahul Choudhury
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ashwini K. Nangia
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - D. Srinivasa Reddy
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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