基于基因组挖掘的发现,一种非典型的真菌非还原性聚基酸合成酶编码二次性基醇生物合成
Yuto Homma1, Tomoya Hasegawa1, Yohei Morishita1
1Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan.
The Journal of antibiotics
|January 14, 2026
概括
基因组挖掘发现了一种新型的真菌基因集群,产生二次性基酸. 这一发现揭示了二元化必不可少的独特的多基酸合成酶机制,为整合素生物合成提供了洞察力.
科学领域:
- 自然产品的发现自然产品的发现
- 合成生物学 合成生物学
- 菌类学 菌类学是指菌类学.
背景情况:
- 基因组挖掘对于识别新型自然产品及其生物合成途径至关重要.
- 多基酸合成酶 (PKS) 是天然产品生物合成中的关键酶,表现出多样化的域架构.
- 了解PKS机制对于发现新的生物活性化合物至关重要.
研究的目的:
- 通过基因组挖掘发现新型的多基因类型,重点关注序列的新性,域架构和预测结构.
- 描述一个新发现的生物合成基因集群 (BGC) 对于潜在的新型多基基因.
- 为了阐明产生的化合物中二聚化的机制.
主要方法:
- 基因组挖掘利用氨基酸序列分类,PKS域架构分析和蛋白质结构预测.
- 已识别的BGC (cyrl集群) 的异质表达.
- 乙载体蛋白 (ACP) 域的位点定向突变发生,以评估它们在二分化中的作用.
主要成果:
- 发现一种新型BGC,含有高降解和非降解PKS (NR-PKS),具有非正规的协同ACP域和特征性铁酶 (TE) 域.
- 异质表达证实了长链基酸 (化合物1) 的新型二元体的产生.
- 变异性研究表明,这两种协同的ACP域对于高效的二分化至关重要,它们可以连续运行.
结论:
- 这项研究提供了真菌二元形成NR-PKS的第一个例子,其协同的ACP域在合成二元基酸中表现出非冗余的作用.
- 在分析表明,TE域促进了基质二元化.
- 这些发现提供了对整合素生物合成的见解,并为开发具有潜在HIV-1整合酶抑制活性的新整合素衍生物提供了基础.
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