A novel hemA mutation is responsible for small colony variant phenotype in Escherichia coli
A novel hemA mutation is responsible for small colony variant phenotype in Escherichia coli
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一种新的hemA突变导致了大肠杆菌中的小菌落变异表型
DOI:
10.1101/2020.05.01.073478
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Hubbard A
中科院分区:
文献类型:
--
作者:
Hubbard A
We identified a small colony variant (SCV) of an amoxicillin/clavulanic acid-resistant derivative of a clinical isolate ofEscherichia colifrom Malawi, which was selected forin vitroin a subinhibitory concentration of gentamicin. The SCV was auxotrophic for hemin and had impaired biofilm formation compared to the ancestral isolates. A single novel nucleotide polymorphism (SNP) inhemA, which encodes a glutamyl-tRNA reductase that catalyses the initial step of porphyrin biosynthesis leading to the production of haem, was responsible for the SCV phenotype. We showed the SNP inhemAresulted in a significant fitness cost to the isolate, which persisted even in the presence of hemin. However, the phenotype quickly reverted during sequential sub-culturing in liquid growth media. AshemAis not found in mammalian cells, and disruption of the gene results in a significant fitness cost, it represents a potential target for novel drug development specifically for the treatment of catheter-associated urinary tract infections caused byE. coli.
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DOI:
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发表时间:
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期刊:
Methods in molecular biology (Clifton, N.J.)
影响因子:
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作者:
通讯作者:
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DOI:
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发表时间:
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影响因子:
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作者:
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