urinary tract infections/proline

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Crystal structure of the usher chaperone YadV reveals a monomer with the proline lock in closed conformation suggestive of an intermediate state

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Cell surface pili assembled by the chaperone-usher (CU) pathway play a crucial role in the adhesion of uropathogenic Escherichia coli. YadV is the chaperone component of the CU pathway of Yad pili. Here, we report the crystal structure of YadV from E. coli. In contrast to major usher chaperones,

Susceptibility of Escherichia coli to the toxic L-proline analogue L-selenaproline is dependent on two L-cystine transport systems.

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OBJECTIVE L-Selenaproline (L-selenazolidine-4-carboxylic acid) is a toxic analogue of L-proline that inhibits the growth of the urinary tract pathogen Escherichia coli in both laboratory culture media and normal human urine. The aim of this study was to identify the transport systems involved in its

Simultaneous determination of proline and pipemidic acid in human urine by capillary electrophoresis with electrochemiluminescence detection.

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Pipemidic acid is extensively used in the treatment of Gram-negative urinary tract infections, and the contents of proline in human urine vary in association with chronic uremia. The simultaneous determination of pipemidic acid and proline in human urine is of significance for quality control of the

Susceptibility of Escherichia coli to L-selenaproline and other L-proline analogues in laboratory culture media and normal human urine.

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OBJECTIVE The aims of this study were to identify analogues of L-proline which inhibit the growth of Escherichia coli in both laboratory culture media and normal human urine and to study their mechanisms of uptake. RESULTS The susceptibility of E. coli to L-proline analogues was studied by radial

Sensitivity of Escherichia coli to proline analogues during osmotic stress and anaerobiosis.

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The sensitivity of wild-type Escherichia coli K-12 to a series of proline analogues was determined in cultures containing increasing concentrations of NaCl under both aerobic and anaerobic conditions. The bacteria were most sensitive to L-azetidine-2-carboxylate and L-thiazolidine-4-carboxylate. The

A model for the role of the proline-linked pentose-phosphate pathway in phenolic phytochemical bio-synthesis and mechanism of action for human health and environmental applications.

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The combination of immunodeficiency, inflammatory process and nutritional status that is characteristic of infective and food-borne illness is more evident in chronic diet- and environment-influenced chronic diseases such as diabetes, obesity, cardiovascular disease, cancer, arthritis and

Designer antibacterial peptides kill fluoroquinolone-resistant clinical isolates.

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A significant number of Escherichia coli and Klebsiella pneumoniae bacterial strains in urinary tract infections are resistant to fluoroquinolones. Peptide antibiotics are viable alternatives although these are usually either toxic or insufficiently active. By applying multiple alignment and

In vivo selection of a chromosomally encoded beta-lactamase variant conferring ceftazidime resistance in Klebsiella oxytoca.

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Klebsiella oxytoca clinical isolate A was recovered from the urine of a 55-year-old man with prostatic and urinary tract infections. This isolate displayed a beta-lactam resistance phenotype consistent with overproduction of a chromosomally encoded class A beta-lactamase and had decreased

Structure-activity relationship study using peptide arrays to optimize Api137 for an increased antimicrobial activity against Pseudomonas aeruginosa.

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The opportunistic Gram-negative bacterium Pseudomonas aeruginosa has a low susceptibility to common antibiotics. Additionally, around 15% of all clinical isolates bear acquired resistance genes. Thus, the development of new antibiotics to combat this pathogen in pneumonia, urinary tract infections,

An allelic variant of the PmrB sensor kinase responsible for colistin resistance in an Escherichia coli strain of clinical origin.

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We investigated the colistin resistance mechanism in an Escherichia coli strain (LC711/14) isolated in Italy in 2014, from an urinary tract infection, which was previously shown to express a colistin resistance mechanism different from mcr-1. LC711/14 was found to carry a novel mutation in the pmrB

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