在Pseudomonas putida中从不同长度的酸中生产多基酸盐
W Dirk Sikkema1, Andrew J Cal1, Upul I Hathwaik1
1Bioproducts Research Unit, USDA-ARS-WRRC, Albany, CA, United States of America.
PloS one
|July 20, 2023
概括
这项研究标准化了使用各种酸的方法来比较Pseudomonas putida菌株的多氧酸盐 (PHA) 生产情况. 结果显示PHA产量与更长链原料的菌株特异性差异,影响生物聚合物研究.
科学领域:
- 微生物学 微生物学
- 生物技术是生物技术.
- 聚合物科学 聚合物科学
背景情况:
- 微生物聚酸酸盐 (PHA) 是具有多种应用的多功能生物聚合物.
- 之前对 Pseudomonas sp. 的 PHA 生产的研究. 使用不同的方法,阻碍了对原料效应的直接比较.
- 需要一种标准化的方法来理解酸原料和PHA生产之间的关系.
研究的目的:
- 通过使用一致的培养介质,研究广泛的酸 (C7-C14) 对三种Pseudomonas putida菌株PHA产生的影响.
- 为了在不同菌株和原料中比较PHA标位,单体分布和分子量.
- 评估PHA量化分析方法,并评估内部与外部标准的影响.
主要方法:
- 在C7到C14的基酸中,在一个一致的介质上培育了三种Pseudomonas putida菌株 (NRRL B-14875,KT2440,GN112).
- 测量生长,细胞干重量,PHA标位,单体组成和分子重量.
- 对PHA量化不同分析技术的比较,包括使用内部和外部标准.
主要成果:
- 所有测试的Pseudomonas putida菌株都产生了与短链酸 (C7-C9) 相似的PHA标位.
- 在长链酸盐 (C10-C14) 中观察到PHA标位的显著差异,其中KT2440和GN112菌株的表现优于B-14875.
- 与外部标准相比,PHA量化分析方法的结果各不相同,内部标准的使用增加了不准确度计算的风险.
结论:
- 菌株选择对于优化PHA生产至关重要,特别是在使用更长链的酸原料时.
- 标准化方法和仔细考虑分析技术对于可靠的PHA生产研究至关重要.
- 这项研究为对微生物PHA生物合成的更一致,更可比的研究提供了基础.
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