通过化学酶合成14个成员的宏类的结构多样化
Brian J Curtis1, Hannah A Boesger1,2, Jennifer J Schmidt1
1Life Sciences Institute, University of Michigan, Mary Sue Coleman Hall, 210 Washtenaw Avenue, Ann Arbor, Michigan 48109-2216, United States.
JACS Au
|February 27, 2026
概括
研究人员探索了皮克罗米多基酸合成酶 (PKS) 系统,以创建新的抗生素支架. 这项研究有效地多样化了麦克罗拉克顿,并通过化学酶合成确定了新的乳.
科学领域:
- 生物化学 生物化学
- 有机化学 有机化学
- 合成生物学 合成生物学
背景情况:
- 皮克罗米辛多基基合成酶 (PKS) 已知可以产生12和14个成员的麦克罗拉克顿.
- 探索PKS灵活性对于发现新的生物活性化合物至关重要.
研究的目的:
- 通过PikAIII/PikAIV PKS系统,有效地多样化新型的14个成员的巨乳素.
- 为了从非自然的五甲基化物中识别6个成员的d-lactones.
- 为了研究复杂的抗生素支架的化学酶合成.
主要方法:
- 使用了一种PikAIII/PikAIV PKS系统与非自然的pentaketides.
- 在新的宏观循环上进行了D-desosamine添加和后期C-H氧化.
- 采用了分子动力学 (MD) 模拟和密度函数理论 (DFT) 计算.
主要成果:
- 成功地多样化了14个成员的巨乳素,并确定了6个成员的d-乳素.
- 证明了PikAIII/PikAIV系统处理非本土基质的能力.
- 通过计算方法阐明了终端催化步骤的反应性和选择性.
结论:
- 皮卡III/PikAIV PKS双模系统在加工非自然基质方面表现出显著的灵活性.
- 连续的生物催化步骤对于复杂的抗生素支架的化学酶合成是有效的.
- 这种方法为产生新型抗生素多样性提供了一个强有力的策略.
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