一种由移动遗传元素衍生的原酶-聚合酶包含多种活动,涉及到DNA复制和修复
Pan Fu1, Yuwei Wang1, Yanqiu Liu1
1State Key Laboratory of Agricultural Microbiology and College of Life Science and Technology, Hubei Hongshan Laboratory, Huazhong Agricultural University, Shizishan Road No.1, Hongshan District, 430070 Wuhan, China.
这项研究表明,与 prokaryotic argonaute 蛋白相关的新型原酶聚合酶 (PrimPol) 在DNA复制和修复中发挥作用. 这种酶有助于修复DNA损伤,可以用于体外DNA组装.
科学领域:
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
- 生物化学 生物化学
背景情况:
- 酶聚合酶 (PrimPols) 是必要的酶,涉及DNA复制和修复在生命的所有领域.
- 由移动遗传元件 (MGE) 编码的多种PrimPols作为复制体起作用,但它们的活动仍然不完全理解.
研究的目的:
- 鉴定与 prokaryotic argonaute 蛋白质 (pAgos) 遗传相关的原酶聚合酶的特征.
- 阐明pAgo相关PrimPol (AgaPP) 在DNA复制和修复过程中的双重作用.
主要方法:
- 对AgaPP的聚合酶和原酶活动的生物化学表征.
- 研究AgaPP与共同编码的酶的相互作用.
- 评估AgaPP在转化DNA合成,终端转移和微同质介导端结合 (MMEJ) 中的作用.
- 评估AgaPP在修复Cas9诱导的DNA断裂和增强大肠杆菌的细胞存活中的有效性.
主要成果:
- AgaPP表现出聚合酶和原酶活动,并与合作伙伴酶形成一个功能复制模块.
- AgaPP展示了转化合成,终端转移和MMEJ能力,类似于人类DNA修复聚合酶 θ.
- AgaPP促进了双链DNA断裂的MMEJ修复,改善了DNA损伤后大肠杆菌的存活率.
- AgaPP的MMEJ活动适用于体外DNA组装.
结论:
- 阿加PP很可能起源于MGE,在DNA复制和修复方面具有双重功能.
- AgaPP是一种新的DNA修复聚合酶,在生物技术和合成生物学中具有潜在的应用.
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