Transcriptional Activity of the Bacterial Replication Initiator DnaA.

Transcriptional Activity of the Bacterial Replication Initiator DnaA.
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DOI:
10.3389/fmicb.2021.662317
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发表时间:
2021
影响因子:
5.2
通讯作者:
Mera PE
Mera PE
中科院分区:
生物学2区
文献类型:
--
作者:
Menikpurage IP;Woo K;Mera PE

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在细菌中,DnaA是最保守的DNA复制起始蛋白。DnaA是一种DNA结合蛋白,是AAA+ ATP酶家族的一部分。除了启动染色体复制外,DnaA还可以作为转录因子,作为激活子或阻遏子。第一个被鉴定为在转录水平上受DnaA调控的基因是dnaA。DnaA已被证明可以调节参与多种细胞事件的基因,包括触发孢子形成、DNA修复和细胞周期调节的基因。DnaA的双重功能(复制启动子和转录因子)是DnaA在时间上协调不同细胞事件与染色体复制开始的潜在机制。这种使用染色体复制起始蛋白作为基因表达调节剂的策略也在古生菌和真核生物中观察到。在这篇迷你综述中,我们专注于我们目前对DnaA在各种细菌物种中的转录活性的了解。
In bacteria, DnaA is the most conserved DNA replication initiator protein. DnaA is a DNA binding protein that is part of the AAA+ ATPase family. In addition to initiating chromosome replication, DnaA can also function as a transcription factor either as an activator or repressor. The first gene identified to be regulated by DnaA at the transcriptional levels was dnaA. DnaA has been shown to regulate genes involved in a variety of cellular events including those that trigger sporulation, DNA repair, and cell cycle regulation. DnaA’s dual functions (replication initiator and transcription factor) is a potential mechanism for DnaA to temporally coordinate diverse cellular events with the onset of chromosome replication. This strategy of using chromosome replication initiator proteins as regulators of gene expression has also been observed in archaea and eukaryotes. In this mini review, we focus on our current understanding of DnaA’s transcriptional activity in various bacterial species.
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