Targeted alteration of the genome lies at the heart of the exploitation of S. pombe as a model system. The rate of analysis is often determined by the efficiency with which a target locus can be manipulated. For most loci this is not a problem, however for some loci, such as fin1+, rates of gene targeting below 5% can limit the scope and scale of manipulations that are feasible within a reasona...

The emergence of multidrug-resistant (MDR) tuberculosis (TB) highlights the urgent need to understand the mechanisms of resistance to the drugs used to treat this disease. The aminoglycosides kanamycin and amikacin are important bactericidal drugs used to treat MDR TB, and resistance to one or both of these drugs is a defining characteristic of extensively drug-resistant TB. We identified mutat...

Metabolite-enabled killing of antibiotic-resistant pathogens by antibiotics is an attractive strategy to manage antibiotic resistance. Our previous study demonstrated that alanine or/and glucose increased the killing efficacy of kanamycin on antibiotic-resistant bacteria, whose action is through up-regulating TCA cycle, increasing proton motive force and enhancing antibiotic uptake. Despite the...

acute lymphoblastic leukemia (all) is one of the most prevalent hematologic malignancies in children. although the cure rate of all has improved over the past decades, the most important reason for all treatment failure is multidrug resistance (mdr) phenomenon. the current study aims to explain the mechanisms involved in multidrug resistance of childhood all, and introduces atp-binding cassette...

Ammonia production is of great importance for the gastric pathogen Helicobacter pylori as a nitrogen source, as a compound protecting against gastric acidity, and as a cytotoxic molecule. In addition to urease, H. pylori possesses two aliphatic amidases responsible for ammonia production: AmiE, a classical amidase, and AmiF, a new type of formamidase. Both enzymes are part of a regulatory netwo...

OBJECTIVES The aim of this study was to provide molecular characterization of methicillin-resistant Staphylococcus aureus (MRSA) spa type t127, sequence type (ST) 1 isolates, detected in a European baseline survey in holdings of breeding pigs, to determine phenotypic and genotypic drug resistance and to compare the results with those obtained from a collection of t127, ST1 MRSA and methicillin-...

C hloroplasts arose 1.2 billion years ago (1) when a freeliving cyanobacterium became an endosymbiont in a eukaryotic host. Since that time, chloroplast genomes have undergone severe reduction, because chloroplast genomes encode between 50 and 200 proteins, whereas cyanobacterial genomes encode several thousand. Accordingly, endosymbiotic theories have always assumed that the cyanobacterial anc...