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Effect of pgsE expression on the molecular weight of poly(γ-glutamic acid) in fermentative production
Polymer Journal ( IF 2.8 ) Pub Date : 2020-09-18 , DOI: 10.1038/s41428-020-00413-7
Ken-Ichi Fujita , Takashi Tomiyama , Takahiro Inoi , Takashi Nishiyama , Eriko Sato , Hideo Horibe , Ryosuke Takahashi , Shinichi Kitamura , Yoshihiro Yamaguchi , Akira Ogita , Toshio Tanaka

Poly(γ-glutamic acid) (PGA) is a biopolymer produced by Bacillus spp. via the γ-amide linkages of d - and/or l -glutamate. Although high-molecular-weight (HMW) PGA possesses many attractive properties, such as flocculating, wound healing, and immune-stimulating effects, no studies have reported factors useful for increasing the molecular weight of PGA during microbial production. PgsB, PgsC, and PgsA are the minimum protein sets required for PGA production in B. subtilis , and PgsE improves PGA productivity. Analysis by size-exclusion chromatography combined with multiangle laser light scattering revealed that the molecular weight of PGA was M w = 2,900,000 g mol −1 and predominantly M w = 47,000 g mol −1 in preparations derived from B. subtilis cells with and without pgsE , respectively. PgsE may be required to increase the molecular weight of PGA. Poly(γ-glutamic acid) (PGA) is a biopolymer produced by Bacillus spp. via the γ-amide linkages of d - and/or l -glutamate. PgsB, PgsC, and PgsA are the minimum protein set required for PGA production in B. subtilis , and PgsE improves PGA productivity. Analysis by size-exclusion chromatography combined with multiangle laser light scattering revealed that the molecular weight of PGA was M w = 2,900,000 g mol −1 or predominantly M w = 47,000 g mol −1 in preparations derived from B. subtilis cells with or without pgsE , respectively. PgsE may be required to increase the apparent molecular weight of PGA.

中文翻译:

pgsE表达对发酵生产中聚(γ-谷氨酸)分子量的影响

聚(γ-谷氨酸)(PGA)是一种由芽孢杆菌产生的生物聚合物。通过 d - 和/或 l - 谷氨酸的 γ-酰胺键。尽管高分子量 (HMW) PGA 具有许多吸引人的特性,例如絮凝、伤口愈合和免疫刺激作用,但没有研究报告可用于在微生物生产过程中增加 PGA 分子量的因素。PgsB、PgsC 和 PgsA 是枯草芽孢杆菌中 PGA 生产所需的最少蛋白质组,而 PgsE 可提高 PGA 生产力。通过尺寸排阻色谱结合多角度激光散射进行的分析表明,在来自枯草芽孢杆菌细胞的具有和不具有 pgsE 的制备物中,PGA 的分子量为 M w = 2,900,000 g mol -1 并且主要为 M w = 47,000 g mol -1 , 分别。可能需要 PgsE 来增加 PGA 的分子量。聚(γ-谷氨酸)(PGA)是一种由芽孢杆菌产生的生物聚合物。通过 d - 和/或 l - 谷氨酸的 γ-酰胺键。PgsB、PgsC 和 PgsA 是枯草芽孢杆菌中 PGA 生产所需的最少蛋白质组,而 PgsE 可提高 PGA 生产力。通过尺寸排阻色谱结合多角度激光散射进行的分析表明,在来自枯草芽孢杆菌细胞的制剂中,含或不含 pgsE 的 PGA 的分子量为 M w = 2,900,000 g mol -1 或主要为 M w = 47,000 g mol -1 , 分别。可能需要 PgsE 来增加 PGA 的表观分子量。PgsA 和 PgsA 是枯草芽孢杆菌中 PGA 生产所需的最少蛋白质组,而 PgsE 可提高 PGA 生产力。通过尺寸排阻色谱结合多角度激光散射进行的分析表明,在来自枯草芽孢杆菌细胞的制剂中,含或不含 pgsE 的 PGA 的分子量为 M w = 2,900,000 g mol -1 或主要为 M w = 47,000 g mol -1 , 分别。可能需要 PgsE 来增加 PGA 的表观分子量。PgsA 和 PgsA 是枯草芽孢杆菌中 PGA 生产所需的最少蛋白质组,而 PgsE 可提高 PGA 生产力。通过尺寸排阻色谱结合多角度激光散射进行的分析表明,在来自枯草芽孢杆菌细胞的制剂中,含或不含 pgsE 的 PGA 的分子量为 M w = 2,900,000 g mol -1 或主要为 M w = 47,000 g mol -1 , 分别。可能需要 PgsE 来增加 PGA 的表观分子量。
更新日期:2020-09-18
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