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Ham S, Cho DH, Oh SJ, Hwang JH, Kim HJ, Shin N, Ahn J, Choi KY, Bhatia SK, Yang YH. Enhanced production of bio-indigo in engineered Escherichia coli, reinforced by cyclopropane-fatty acid-acyl-phospholipid synthase from psychrophilic Pseudomonas sp. B14-6. J Biotechnol 2023; 366:1-9. [PMID: 36849085 DOI: 10.1016/j.jbiotec.2023.02.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 01/29/2023] [Accepted: 02/22/2023] [Indexed: 02/27/2023]
Abstract
Indigo dye is an organic compound with a distinctive blue color. Most of the indigo currently used in industry is produced via chemical synthesis, which generates a large amount of wastewater. Therefore, several studies have recently been conducted to find ways to produce indigo eco-friendly using microorganisms. Here, we produced indigo using recombinant Escherichia coli with both an indigo-producing plasmid and a cyclopropane fatty acid (CFA)-regulating plasmid. The CFA-regulating plasmid contains the cfa gene, and its expression increases the CFA composition of the phospholipid fatty acids of the cell membrane. Overexpression of cfa showed cytotoxicity resistance of indole, an intermediate product formed during the indigo production process. This had a positive effect on indigo production and cfa originated from Pseudomonas sp. B 14-6 was used. Optimal conditions for indigo production were determined by adjusting the expression strain, culture temperature, shaking speed, and isopropyl β-D-1-thiogalactopyranoside concentration. Treatment with Tween 80 at a particular concentration to increase the permeability of the cell membrane had a positive effect on indigo production. The strain with the CFA plasmid produced 4.1 mM of indigo after 24 h of culture and produced 1.5-fold higher indigo than the control strain without the CFA plasmid that produced 2.7 mM.
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Affiliation(s)
- Sion Ham
- Department of Biological Engineering, College of Engineering, Konkuk University, the Republic of Korea
| | - Do-Hyun Cho
- Department of Biological Engineering, College of Engineering, Konkuk University, the Republic of Korea
| | - Suk Jin Oh
- Department of Biological Engineering, College of Engineering, Konkuk University, the Republic of Korea
| | - Jeong Hyeon Hwang
- Department of Biological Engineering, College of Engineering, Konkuk University, the Republic of Korea
| | - Hyun Jin Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, the Republic of Korea
| | - Nara Shin
- Department of Biological Engineering, College of Engineering, Konkuk University, the Republic of Korea
| | - Jungoh Ahn
- Biotechnology Process Engineering Center, Korea Research Institute Bioscience Biotechnology (KRIBB), the Republic of Korea
| | - Kwon-Young Choi
- Department of Environmental and Safety Engineering, College of Engineering, Ajou University, the Republic of Korea; Department of Energy Systems Research, Ajou University, the Republic of Korea
| | - Shashi Kant Bhatia
- Department of Biological Engineering, College of Engineering, Konkuk University, the Republic of Korea.
| | - Yung-Hun Yang
- Department of Biological Engineering, College of Engineering, Konkuk University, the Republic of Korea.
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Ham S, Bhatia SK, Gurav R, Choi YK, Jeon JM, Yoon JJ, Choi KY, Ahn J, Kim HT, Yang YH. Gamma aminobutyric acid (GABA) production in Escherichia coli with pyridoxal kinase (pdxY) based regeneration system. Enzyme Microb Technol 2022; 155:109994. [DOI: 10.1016/j.enzmictec.2022.109994] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 01/12/2022] [Accepted: 01/13/2022] [Indexed: 11/03/2022]
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