Utilizing a tyrosine exporter to facilitate 4-hydroxystyrene biosynthesis in an E. coli-E. coli co-culture

4-hydroxystyrene is an important commodity chemical with recognized industrial values. In this study, 4-hydroxystyrene biosynthesis was achieved using engineered E. coli. An amino acid exporter protein PhpCAT was utilized in combination with a previously developed biosensor-assisted cell selection m...

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Veröffentlicht in:Biochemical engineering journal 2021-12, Vol.176, p.108178, Article 108178
Hauptverfasser: Gargatte, Sweta, Li, Zhenghong, Zhou, Yiyao, Wang, Xiaonan, Zhuang, Lei, Zhang, Haoran
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Sprache:eng
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Zusammenfassung:4-hydroxystyrene is an important commodity chemical with recognized industrial values. In this study, 4-hydroxystyrene biosynthesis was achieved using engineered E. coli. An amino acid exporter protein PhpCAT was utilized in combination with a previously developed biosensor-assisted cell selection mechanism to strengthen the biosynthesis of the pathway intermediate tyrosine. When incorporated into an E. coli-E. coli co-culture, the exporter also improved tyrosine’s mass transfer between the co-culture members to facilitate the streamlined 4-hydroxystyrene bioproduction. It was shown that the resulting co-culture produced 298 mg/L 4-hydroxystyrene from 5 g/L glucose, which is 96% higher than the control co-culture without the exporter. The achieved yield of 0.06 g/g glucose, to our knowledge, is the highest among previous studies on microbial biosynthesis. Our finding demonstrates that the utilization of the exporter protein for a pathway intermediate is an effective methodology for enhancing biosynthesis performance of microbial co-cultures. •The use of a tyrosine exporter protein enhanced the tyrosine production in E. coli.•The pathway intermediate transfer between the co-culture strains was improved.•De novo biosynthesis of 298 mg/L 4-Hydroxystyrene from 5 g/L glucose was achieved.
ISSN:1369-703X
1873-295X
DOI:10.1016/j.bej.2021.108178