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来自Ralstonia eutropha的新陈代谢工程,用于从原始甘油中提升聚3-基酸盐的生产

Hui-Suan Ng¹, Cheng-Yung Chang², Chao-An Chiu²

¹Smart Bioresource Recovery and Formulation Laboratory, Department of Chemical Engineering and Materials Science, Yuan Ze University, Chungli, Taoyuan 320, Taiwan.

Bioresource technology

|October 25, 2025

概括

经过工程改造的Ralstonia eutropha B101带有维特里奥斯基拉血红蛋白 (VHb) 基因显著增强了多基酸盐 (PHA) 产量. 这种重组菌株有效利用原始甘油,为可生物降解塑料提供了一种可持续的方法.

科学领域:

生物技术是生物技术.
微生物工程微生物工程

背景情况:

拉尔斯托尼亚 (Ralstonia eutropha) 是聚酸酸盐 (PHA) 生产的一个关键细菌.
增强微生物菌株以提高PHA产量和高效地利用基质对于工业应用至关重要.

研究的目的:

开发一种具有改善细胞生长和PHA生产的重组Ralstonia缩菌株.
评估原始甘油作为工程菌株PHA合成的碳来源的利用.

主要方法:

通过引入玻璃血红蛋白 (VHb) 基因,对野生类型的R. eutropha H16进行基因工程.
使用原始甘油作为碳源的发酵实验.
细胞干重量 (CDW),PHA含量,PHA度和PHA特性 (分子重量,PDI,热降解,结晶性) 的分析.

主要成果:

再组合的R. eutropha B101与野生类型 (13.65 g L-1) 相比,显示了显著更高的糖醇消耗 (33.35 g L-1).
在最佳条件下,CDW为37.94g L-1,PHA含量为68.39%,L-1PHA度为22.95g.
合成的PHA被确定为具有特定分子特性的聚3-基酸 (P3HB).

结论:

再组合的R. eutropha B101是增强PHA生产的有希望的平台.
来自工业废物的原始甘油是PHA合成的可行,具有成本效益和可持续的碳来源.
这种方法为工业规模生产可生物降解塑料提供了一个环保的战略.

关键词:

生物聚合物生物聚合物发酵发酵是一个过程.聚基酸) 是一种聚基酸.再组合剂的使用情况.序列同类的重组组合.

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