Medium Chain Length Polyhydroxyalkanoate Production by Engineered Pseudomonas gessardii Using Acetate-formate as Carbon Sources.

IF 3.3 4区 生物学 Q2 MICROBIOLOGY
Journal of Microbiology Pub Date : 2024-07-01 Epub Date: 2024-05-03 DOI:10.1007/s12275-024-00136-x
Woo Young Kim, Seung-Jin Kim, Hye-Rin Seo, Yoonyong Yang, Jong Seok Lee, Moonsuk Hur, Byoung-Hee Lee, Jong-Geol Kim, Min-Kyu Oh
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引用次数: 0

Abstract

Production of medium chain length polyhydroxyalkanoate (mcl-PHA) was attempted using Pseudomonas gessardii NIBRBAC000509957, which was isolated from Sunchang, Jeollabuk-do, Republic of Korea (35°24'27.7"N, 127°09'13.0"E) and effectively utilized acetate and formate as carbon sources. We first evaluated the utilization of acetate as a carbon source, revealing optimal growth at 5 g/L acetate. Then, formate was supplied to the acetate minimal medium as a carbon source to enhance cell growth. After overexpressing the acetate and formate assimilation pathway enzymes, this strain grew at a significantly higher rate in the medium. As this strain naturally produces PHA, it was further engineered metabolically to enhance mcl-PHA production. The engineered strain produced 0.40 g/L of mcl-PHA with a biomass content of 30.43% in fed-batch fermentation. Overall, this strain can be further developed to convert acetate and formate into valuable products.

Abstract Image

以醋酸-甲酸酯为碳源的工程假单胞菌生产中链长度聚羟基烷酸酯
该假单胞菌分离自大韩民国全罗北道顺昌(35°24'27.7 "N,127°09'13.0 "E),能有效利用醋酸盐和甲酸盐作为碳源。我们首先评估了醋酸盐作为碳源的利用情况,结果表明在 5 克/升醋酸盐条件下生长最佳。然后,在乙酸最小培养基中加入甲酸盐作为碳源,以促进细胞生长。在过表达乙酸和甲酸同化途径酶后,该菌株在培养基中的生长速度明显提高。由于该菌株能自然产生 PHA,因此对其进行了进一步的代谢改造,以提高 mcl-PHA 的产量。经改造的菌株在饲料批量发酵过程中产生了 0.40 克/升的 mcl-PHA,生物量含量为 30.43%。总之,该菌株可进一步开发,将醋酸盐和甲酸盐转化为有价值的产品。
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来源期刊
Journal of Microbiology
Journal of Microbiology 生物-微生物学
CiteScore
5.70
自引率
3.30%
发文量
0
审稿时长
3 months
期刊介绍: Publishes papers that deal with research on microorganisms, including archaea, bacteria, yeasts, fungi, microalgae, protozoa, and simple eukaryotic microorganisms. Topics considered for publication include Microbial Systematics, Evolutionary Microbiology, Microbial Ecology, Environmental Microbiology, Microbial Genetics, Genomics, Molecular Biology, Microbial Physiology, Biochemistry, Microbial Pathogenesis, Host-Microbe Interaction, Systems Microbiology, Synthetic Microbiology, Bioinformatics and Virology. Manuscripts dealing with simple identification of microorganism(s), cloning of a known gene and its expression in a microbial host, and clinical statistics will not be considered for publication by JM.
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