Characterization of mdcR, a regulatory gene of the malonate catabolic system in Klebsiella pneumoniae.
نویسندگان
چکیده
The Klebsiella pneumoniae mdcR gene, which encodes a LysR-type regulator, was overexpressed in Escherichia coli. Purified MdcR was found to bind specifically to the control region of either the malonate decarboxylase (mdc) genes or mdcR. We have also demonstrated that MdcR is an activator of the expression of the mdc genes, whereas it represses the transcription of the putative control region of mdcR, PmdcR, indicating a negative autoregulatory control.
منابع مشابه
شناسایی ایزوله های کلبسیلا پنومونیه دارای ژن blaCTX و تعیین مقاومت متقاطع آنها در بیماران بستری در بیمارستان
Background and Aim: Klebsiella pneumoniae is a member of the Enterobacteriaceae family. There is a global emergence of multidrug-resistant (MDR) strains of K. pneumoniae, a Gram-negative enteric bacterium that causes nosocomial and urinary tract infections. The aims of the present study were to identify the Klebsiella pneumoniae infections in hospitalized patients, characterization of blaCTX ge...
متن کاملRegulation and evolution of malonate and propionate catabolism in proteobacteria.
Bacteria catabolize malonate via two pathways, encoded by the mdc and mat genes. In various bacteria, transcription of these genes is controlled by the GntR family transcription factors (TFs) MatR/MdcY and/or the LysR family transcription factor MdcR. Propionate is metabolized via the methylcitrate pathway, comprising enzymes encoded by the prp and acn genes. PrpR, the Fis family sigma 54-depen...
متن کاملDetection of magA Gene in Klebsiella spp. Isolated from Clinical Samples
Objective(s): Klebsiella infections are caused mainly by K. pneumoniae and K. oxytoca. In the last two decades, a new type of invasive Klebsiella pneumoniae which contains mucoviscosity-associated gene (magA) has emerged. The aim of this study was to investigate the prevalence of magA gene and to detect antimicrobial susceptibility patterns of Klebsiella spp. isolated from clinical samples....
متن کاملPrevalence of blaCTX-M Gene among Extended- Spectrum β-Lactamases Producing Klebsiella pneumoniae Clinical Isolates in Iran: A Meta-Analysis
Background: CTX-M-type extended-spectrum β-lactamases (ESBLs) are the most prevalent ESBLs in bacterial members of Enterobacteriaceae family including Klebsiella pneumoniae. The global spread of CTX-M-producing K. pneumoniae is a major concern in most countries including Iran. The aim of this meta-analysis was to determine the relative frequency (RF) of blaCTX-M gene among ESBLs-producing K. pn...
متن کاملThe impact of Grammosciadium platycarpum Boiss. & Hausskn. extract on oqxA efflux pump gene expression in antibiotic resistant clinical isolates of Klebsiella pneumoniae using real time PCR
Background: Klebsiella pneumoniae is one of the most important causes of nosocomial infections, especially wound infection after surgery. One of the mechanisms of antibiotic resistance in K. pneumoniae strains, especially ciprofloxacin, is the presence of efflux pump. Objective: The aim of this study was to evaluate the anti-efflux activity of Grammosciadium platycarpum Boiss. & Hausskn. extrac...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of bacteriology
دوره 181 7 شماره
صفحات -
تاریخ انتشار 1999