生物合成中的酶变异和对不同分子重量的生物评估hyaluronanonan
Tahereh Ebrahimi1, Malihe Keramati2, Farnaz Khodabakhsh3
1New Technologies Research Group, Department of Nanobiotechnology, Pasteur Institute of Iran, Tehran, Iran.
AMB Express
|May 10, 2024
概括
研究人员设计了截断的Streptococcus equisimilis氨酸合成酶 (SeHAS),以控制氨酸 (HA) 的尺寸和特性. 这项工作可以生产尺寸定义的氨酸,用于潜在的治疗应用.
科学领域:
- 生物化学 生物化学
- 聚合物科学 聚合物科学
- 生物技术是生物技术.
背景情况:
- 氨酸 (HA) 是一种具有多种生物作用的关键甘氨酸.
- 甲状腺细胞的大小和结构会影响其生物活性.
- 通过氨酸合成酶 (HAS) 控制HA合成是产生特定HA类型的关键.
研究的目的:
- 调查截断的Streptococcus equisimilis氨酸合成酶 (SeHAS) 对氨酸 (HA) 合成的影响.
- 描述合成HA的分子量,结构,分散性和生物活性.
- 阐明跨膜域 (TMD) 在SeHAS功能和HA特征中的作用.
主要方法:
- 在体外合成低分子量和高分子量氨酸 (LMW-HA和HMW-HA) 使用截断的SeHAS变体.
- 酶动力学分析以确定动力学参数 (Km).
- 使用电泳,FTIR光谱和炭醇测定对HA的表征.
- 通过对内皮细胞 (ECs) 的细胞增殖和细胞迁移测定来评估生物活性.
主要成果:
- 截断的SeHAS变种产生了具有不同分子量 (MW) 和分散性的HA.
- SeHAS产生了聚散物HMW-HA (268 kDa),而HAS123和HAS23产生了聚散物LMW-HA (<30 kDa).
- HAS_Intra产生了低分散的LMW-HA,动力学研究显示,截断变体的Km值增加.
- LMW-HAs促进了EC的扩散和迁移,而HMW-HAs在更高度下显示出抑制作用.
结论:
- 超膜域 (TMD) 的SeHAS显著影响酶动力学,HA生产产量,大小和分散.
- 工程SeHAS提供了一个合理设计和生产尺寸定义HA的途径.
- 结果为开发针对特定生物医学应用的定制HA提供了洞察力.
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