The multiple antibiotic resistance operon of enteric bacteria controls DNA repair and outer membrane integrity.
The multiple antibiotic resistance operon of enteric bacteria controls DNA repair and outer membrane integrity.
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DOI:
10.1038/s41467-017-01405-7
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发表时间:
2017-11-13
影响因子:
16.6
通讯作者:
Grainger DC
中科院分区:
文献类型:
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作者:
Sharma P;Haycocks JRJ;Middlemiss AD;Kettles RA;Sellars LE;Ricci V;Piddock LJV;Grainger DC
The multiple antibiotic resistance (mar) operon of Escherichia coli is a paradigm for chromosomally encoded antibiotic resistance in enteric bacteria. The locus is recognised for its ability to modulate efflux pump and porin expression via two encoded transcription factors, MarR and MarA. Here we map binding of these regulators across the E. coli genome and identify an extensive mar regulon. Most notably, MarA activates expression of genes required for DNA repair and lipid trafficking. Consequently, the mar locus reduces quinolone-induced DNA damage and the ability of tetracyclines to traverse the outer membrane. These previously unrecognised mar pathways reside within a core regulon, shared by most enteric bacteria. Hence, we provide a framework for understanding multidrug resistance, mediated by analogous systems, across the Enterobacteriaceae. Transcription factors MarR and MarA confer multidrug resistance in enteric bacteria by modulating efflux pump and porin expression. Here, Sharma et al. show that MarA also upregulates genes required for lipid trafficking and DNA repair, thus reducing antibiotic entry and quinolone-induced DNA damage. Transcription factors MarR and MarA confer multidrug resistance in enteric bacteria by modulating efflux pump and porin expression. Here, Sharma et al. show that MarA also upregulates genes required for lipid trafficking and DNA repair, thus reducing antibiotic entry and quinolone-induced DNA damage.
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影响因子:
5.6
作者:
Ankarloo J;Wikman S;Nicholls IA
通讯作者:
Nicholls IA
影响因子:
6.7
作者:
De Majumdar S;Yu J;Fookes M;McAteer SP;Llobet E;Finn S;Spence S;Monahan A;Monaghan A;Kissenpfennig A;Ingram RJ;Bengoechea J;Gally DL;Fanning S;Elborn JS;Schneiders T
通讯作者:
Schneiders T
影响因子:
4.5
作者:
Chintakayala K;Singh SS;Rossiter AE;Shahapure R;Dame RT;Grainger DC
通讯作者:
Grainger DC
影响因子:
3.2
作者:
ARIZA, RR;COHEN, SP;DEMPLE, B
通讯作者:
DEMPLE, B
影响因子:
9.9
作者:
通讯作者:
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