增强模块化聚基酸合成酶的模块化:在模块化聚基酸合成酶中进行晶化,其催化剂是malonyl-CoA:ACP晶酶
Pawan Kumar1, Andrew T Koppisch, David E Cane
1Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA.
Journal of the American Chemical Society
|November 20, 2003
概括
研究人员通过修改乙转移酶 (AT) 域来设计模块化多基化合成酶. 这种策略允许精确控制扩展器单元的结合,使新型聚胺天然产品类型的合成成为可能.
科学领域:
- 生物化学 生物化学
- 合成生物学 合成生物学
- 自然产品的合成自然产品的合成
背景情况:
- 模块化聚基酸合成酶 (PKS) 组装复杂的自然产品.
- 乙转移酶 (AT) 域控制扩展单元的选择.
- 调节AT域特异性是创建新型聚基类相应物的关键.
研究的目的:
- 开发一种方法来精确控制模块化PKS中的扩展器单元选择.
- 为了设计一个PKS用于修改过的多基类的特定场所合成.
- 为了研究马洛尼尔-CoA:ACP转基因酶用于工程聚基化物生物合成的使用.
主要方法:
- 设计了一个AT-null突变的6-deoxyerythronolide B合成酶.
- 利用malonyl-CoA:ACP转基酶将malonyl组加载到乙载体蛋白 (ACP) 域上.
- 在体外和体内评估了2 - 甲基-6 - 脱氧乙烯化物B的生产.
主要成果:
- 通过交易化策略,成功证明了聚基基的特定位点修饰.
- 工程 6-deoxyerythronolide B 合成酶专门生产了2-desmethyl-6-deoxyerythronolide B. 的产物.
- 实现了与野生类型合成酶相美的生产力.
结论:
- 马洛尼尔基对AT-null PKS的交易是工程聚基化生物合成的有效策略.
- 这种方法可以精确控制扩展器单元的内置.
- 能够有效地生物合成新型天然产品类似物,并具有潜在的治疗应用.
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