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来自Dictyobacter vulcani sp的一种酸乙烯转移酶 W12扩大了组合生物合成工具包

Kenneth K Hsu¹, Charlie M Ferguson¹, Christina M McBride¹

¹Department of Chemistry, Haverford College, Haverford, Pennsylvania 19041, United States.

|September 2, 2025

概括

研究人员发现了一种新酶,vulcPPT,可激活II型多基合成酶 (PKS) 的乙烯载体蛋白 (ACP). 这种酶通过组合生物合成使得新生物活性分子具有更广泛的兼容性.

科学领域:

生物催化和酶工程
微生物天然产品生物合成
合成生物学

背景情况:

微生物II型多基合成酶 (PKS) 是生产复杂药的关键酶组.
使用II型PKS的组合生物合成提供了新生物活性分子的途径,但受到蛋白质兼容性的限制.
乙载体蛋白 (ACP) 需要由酸乙烯转移酶 (PPTases) 激活,以在PKS中转移中间体.

研究的目的:

确定和描述一种用于增强II型PKS组合生物合成的新型PPTase.
调查新型PPTase与各种ACP的基质兼容性.
优化反应条件以实现有效的ACP激活.

主要方法:

来自Dictyobacter vulcani的新型非活性细菌PPTase (vulcPPT) 的发现和表达
针对本地和非本地ACP的小组测试vulcPPT活动.
优化酸inylation反应条件以改善apo-to-holo转化.

主要成果:

vulcPPT证明了广泛的基质兼容性,激活了所有测试的ACP,包括一个具有挑战性的非同类ACP.
在某些ACP中,新型PPTase的活性高于已有的PPTases,如AcpS和Sfp.
优化条件提高了vulcPPT催化ACP激活的效率.

结论:

vulcPPT是一种多功能且有效的PPTase用于激活ACP,扩大了II型PKS工程的可能性.
这一发现有助于获得用于组合生物合成的功能合成成分.
这些发现为进一步研究PPTase兼容性和PKS工程提供了基础.

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