Engineering Streptomyces diastatochromogenes 1628 to increase the production of toyocamycin

Engineering Streptomyces diastatochromogenes 1628 to increase the production of toyocamycin
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对产色链霉菌 1628 进行工程改造以增加丰加霉素的产量

DOI:
10.1002/elsc.201400239
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发表时间:
2015-11
影响因子:
2.7
通讯作者:
Yu Xiaoping
Yu Xiaoping
中科院分区:
工程技术3区
文献类型:
--
作者:
Tao Libin;Ma Zheng;Xu Xianhao;Bechthold Andreas;Bian Yalin;Shentu Xuping;Yu Xiaoping

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Toyocamycin (TM)具有抗真菌活性,可用于植物病害的治疗。TM由异色链霉菌(Streptomyces disastatochromogenes) 1628产生,但产率一直很低。最近,基因toyG被克隆;然而,对toyG对TM生产的影响却一无所知。在这项研究中,toyG与编码核糖体再循环因子的frr和编码玻璃体颤菌血红蛋白的vgb进行了合理的联合共表达。将这些基因以双或三组合方式引入菌株S. diastatochromogenes 1628,可显著提高TM的产量。转录分析表明,构建的重组菌株的TM产量增加是由于toyG基因转录水平的增加。最后,在所有不同的重组菌株中,PermE*控制下含有vgb, frr和toyG的菌株S. diastatochromogenes 1628‐VGF的TM产量增加最多。值得注意的是,S. disastatochromogenes 1628‐VGF在72 h时产生的TM达到了319.2 mg/L的最高水平,而原菌株1628在84 h时的TM产量为147.1 mg/L。本研究构建的高产节能菌株1628‐VGF将有利于TM的工业化生产。
Toyocamycin (TM) shows antifungal activity and can be used to treat plant diseases. TM is produced by Streptomyces diastatochromogenes 1628, but the production rate is always very low. Recently, the gene toyG was cloned; however, nothing was known about the influence of toyG on TM production. In this study, the rational combined co‐expression of toyG with frr encoding a ribosome recycling factor and vgb encoding Vitreoscilla hemoglobin was performed. Introduction of these genes in double‐ or triple‐combination into strain S. diastatochromogenes 1628 led to greatly increased TM production. Transcription analysis revealed that higher TM production in the constructed recombinant strains resulted from an increase in transcriptional levels of toyG gene. At the end, among all these different recombinant strains, the strain S. diastatochromogenes 1628‐VGF, harboring vgb, frr, and toyG placed under the control of PermE*, exhibited the largest increase in TM production. Notably, TM produced by S. diastatochromogenes 1628‐VGF reached the highest level of 319.2 mg/L at 72 h, while TM yield of the original strain 1628 was 147.1 mg/L at 84 h. The high‐yield, energy‐saving strain 1628‐VGF constructed in this study shall be beneficial for the industrial production of TM.
DOI: --
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期刊: --
影响因子: --
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