Transcriptional repressor HipB regulates the multiple promoters in Escherichia coli = 전사억제 HipB의 대장균내 다양한 프로모터 조절

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Title
Transcriptional repressor HipB regulates the multiple promoters in Escherichia coli = 전사억제 HipB의 대장균내 다양한 프로모터 조절
Author(s)
C Y Lin; N Awano; H Masuda; Jung Ho Park; M Inouye
Bibliographic Citation
Journal of Molecular Microbiology and Biotechnology, vol. 23, no. 6, pp. 440-447
Publication Year
2013
Abstract
HipB is a DNA-binding protein in Escherichia coli and negatively regulates its own promoter by binding to the palindromic sequences [ TATCC N 8 GGATA (N represents any nucleotides)] on the hipBA promoter. For such sequences, bioinformatic analysis revealed that there are a total of 39 palindromic sequences ( TATCC N (x) GGATA : N is any nucleotides and x is the number of nucleotides from 1 to 30) in the promoter regions of 33 genes on the E. coli genome. Notably, eutH and fadH have two and three TATCC N (x) GGATA palindromic sequences located in their promoters, respectively. Another significant finding was that a palindromic sequence was also identified in the promoter region of hipAB locus, known to be involved in the RelA-dependent persister cell formation in bacteria. Here, we demonstrated that HipB binds to the palindromic structures in the eutH , fadH , as well as the relA promoter regions and represses their expressions. We further demonstrated that HipA enhances the repression of the relA promoter activity by HipB. This effect was not ob-served with D291A HipA mutant which was previously shown to lack an ability to interact with HipB, indicating that HipA enhances the HipB's repressor activity through direct interaction with HipB.
Keyword
DormancyEscherichia coliHipAHipBPersistencePpGpp synthesisRelAToxin-antitoxin system
ISSN
1464-1801
Publisher
Karger
DOI
http://dx.doi.org/10.1159/000354311
Type
Article
Appears in Collections:
Ochang Branch Institute > Division of Bioinfrastructure > Bio-Evaluation Center > 1. Journal Articles
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