在多基因宏类路径中,乙转移酶域的进化重编程
Liran Zhang1, Jinwei Ren2, Chengyu Zhang1
1State Key Laboratory of Bioreactor Engineering, School of Biotechnology, East China University of Science and Technology, Shanghai 200237, China.
Microorganisms
|January 28, 2026
概括
研究人员发现了多基酸合成酶如何演变,发现转移酶域可以切换功能以启动链. 这揭示了产生多种多基结构和潜在治疗化合物的新机制.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 进化生物学 进化生物学
背景情况:
- I型多基酸合成酶 (T1PKS) 组装线的进化途径尚不清楚.
- 聚基基是一种多样化的自然产品类别,具有显著的治疗潜力.
研究的目的:
- 为了研究T1PKS装配线的演变.
- 了解多基生物合成中的转移酶 (AT) 域的功能重编程.
- 探索多基体结构多样化的新机制.
主要方法:
- 系统地挖掘聚生物合成基因集群.
- 乙转移酶 (AT) 和合成酶 (KS) 域的生物化学分析.
- 在使用欧罗丁路径的洞察力来设计甘地丁路径.
主要成果:
- 鉴定了一种具有分歧的加载模块架构的新型欧罗西丁生物合成途径,代表了一个进化过渡状态.
- 证明了AT域的功能重编程,使基质特异性从扩展单元 (malonyl-CoA) 转移到启动单元 (acyl-CoA).
- 观察到KS领域的并行演变 (KSS→KSQ突变),使启动策略多样化.
- 通过整合来自eurocidin的启动选择性单模组,设计了candicidin路径以产生异形启动类型.
结论:
- AT领域的功能性可塑性是多基基结构多样化的新机制,解释了AT启动的装配线的起源.
- 以进化为灵感的AT重编程为修改多基基提德启动单元提供了一个合理的框架.
- 这种方法扩大了结构多样性,并增强了多基虫的治疗潜力.
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