Positioning Diverse Type IV Structures and Functions Within Class 1 CRISPR-Cas Systems.

Positioning Diverse Type IV Structures and Functions Within Class 1 CRISPR-Cas Systems.
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DOI:
10.3389/fmicb.2021.671522
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发表时间:
2021
影响因子:
5.2
通讯作者:
Jackson RN
Jackson RN
中科院分区:
生物学2区
文献类型:
--
作者:
Taylor HN;Laderman E;Armbrust M;Hallmark T;Keiser D;Bondy-Denomy J;Jackson RN

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IV型CRISPR系统编码与小RNA联合收割机组合以形成多亚基核糖核蛋白复合物的CRISPR相关(Cas)样蛋白。然而,由于缺乏Cas核酸酶、整合酶和大多数CRISPR系统中常见的其他遗传特征,因此难以预测IV型作用机制和生物学功能。在这里,我们总结了最近的生物信息学和实验进展,共同提供了第一次瞥见特定的IV型亚型的功能。我们还提供了多亚基(1类)CRISPR系统背景下IV型特异性蛋白的生物信息学和结构分析,为未来旨在阐明这些隐藏系统功能的研究提供信息。
Type IV CRISPR systems encode CRISPR associated (Cas)-like proteins that combine with small RNAs to form multi-subunit ribonucleoprotein complexes. However, the lack of Cas nucleases, integrases, and other genetic features commonly observed in most CRISPR systems has made it difficult to predict type IV mechanisms of action and biological function. Here we summarize recent bioinformatic and experimental advancements that collectively provide the first glimpses into the function of specific type IV subtypes. We also provide a bioinformatic and structural analysis of type IV-specific proteins within the context of multi-subunit (class 1) CRISPR systems, informing future studies aimed at elucidating the function of these cryptic systems.
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