論文 - 詳細
| RRC ID | 70557 |
|---|---|
| 著者 | Thongbhubate K, Irie K, Sakai Y, Itoh A, Suzuki H. |
| タイトル | Improvement of putrescine production through the arginine decarboxylase pathway in Escherichia coli K-12. |
| ジャーナル | AMB Express |
| Abstract |
In the bio-based polymer industry, putrescine is in the spotlight for use as a material. We constructed strains of Escherichia coli to assess its putrescine production capabilities through the arginine decarboxylase pathway in batch fermentation. N-Acetylglutamate (ArgA) synthase is subjected to feedback inhibition by arginine. Therefore, the 19th amino acid residue, Tyr, of argA was substituted with Cys to desensitize the feedback inhibition of arginine, resulting in improved putrescine production. The inefficient initiation codon GTG of argA was substituted with the effective ATG codon, but its replacement did not affect putrescine production. The essential genes for the putrescine production pathway, speA and speB, were cloned into the same plasmid with argAATG Y19C to form an operon. These genes were introduced under different promoters; lacIp, lacIqp, lacIq1p, and T5p. Among these, the T5 promoter demonstrated the best putrescine production. In addition, disruption of the puuA gene encoding enzyme of the first step of putrescine degradation pathway increased the putrescine production. Of note, putrescine production was not affected by the disruption of patA, which encodes putrescine aminotransferase, the initial enzyme of another putrescine utilization pathway. We also report that the strain KT160, which has a genomic mutation of YifEQ100TAG, had the greatest putrescine production. At 48 h of batch fermentation, strain KT160 grown in terrific broth with 0.01 mM IPTG produced 19.8 mM of putrescine. |
| 巻・号 | 11(1) |
| ページ | 168 |
| 公開日 | 2021-12-15 |
| DOI | 10.1186/s13568-021-01330-5 |
| PII | 10.1186/s13568-021-01330-5 |
| PMID | 34910273 |
| PMC | PMC8674398 |
| IF | 2.499 |
| オルトメトリクス指標 |
オルトメトリクス指標項目
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| 最多言及媒体 | Patent(IFI CLAIMS) |
| 各媒体での言及数の合計 | 4 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 3.0 |
| リソース情報 | |
| 原核生物(大腸菌) | MG1655 ME9980 |