Combination of ARTP mutagenesis and color-mediated high-throughput screening to enhance 1-naphthol yield from microbial oxidation of naphthalene in aqueous system
Chenggang Qiu , Alei Zhang , Sha Tao , Kang Li , Kequan Chen , Pingkai Ouyang
Front. Chem. Sci. Eng. ›› 2020, Vol. 14 ›› Issue (5) : 793 -801.
Combination of ARTP mutagenesis and color-mediated high-throughput screening to enhance 1-naphthol yield from microbial oxidation of naphthalene in aqueous system
Strain QCG of the aerobic bacteria Bacillus cereus is capable of producing 1-naphthol from naphthalene, this strain was first isolated and characterized in this study. Strain QCG was mutagenized to enhance 1-naphthol production, using atmospheric and room temperature plasma (ARTP) technology. Then, a microbial clone screening system was used to accelerate the operation. Meanwhile, a novel color-mediated high-throughput screening using 4-aminoantipyrine was performed to screen mutants. The optimal mutant strain QCG4 produced 19.58±0.34 mg∙L‒1 1-naphthol from naphthalene that was 47.32% higher than that of the original strain (13.29±0.28 mg∙L‒1). In addition, the optimal conditions for 1-naphthol production via whole-cell catalysis of strain QCG4 were determined to be an OD600 of 40, 150 mg∙L‒1 naphthalene, and 7.5% dimethyl formamide as a co-solvent at pH 7.5 and 26°C for 3 h, resulting in 41.18±0.12 mg∙L‒1 1-naphthol, i.e., the mutant strain produces a 2.1-fold higher yield compared to the original strain.
Bacillus cereus QCG / naphthalene / 1-naphthol / ARTP mutagenesis / high-throughput screening / 4-aminoantipyrine
| [1] |
|
| [2] |
|
| [3] |
|
| [4] |
|
| [5] |
|
| [6] |
|
| [7] |
|
| [8] |
|
| [9] |
|
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
|
| [14] |
|
| [15] |
|
| [16] |
|
| [17] |
|
| [18] |
|
| [19] |
|
| [20] |
|
| [21] |
|
| [22] |
|
| [23] |
|
| [24] |
|
| [25] |
|
| [26] |
|
| [27] |
|
| [28] |
|
| [29] |
|
| [30] |
|
| [31] |
|
| [32] |
|
| [33] |
|
| [34] |
|
| [35] |
|
| [36] |
|
| [37] |
|
| [38] |
|
| [39] |
|
| [40] |
|
Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature
/
| 〈 |
|
〉 |