Clonal relationships among Escherichia coli serogroup 06 isolates from human and animal infections.

abstract：:Deferoxamine (DFO), an FDA-approved iron chelator used for treatment of iron poisoning, affects bacteria as iron availability is intimately connected with growth and several virulence determinants. However, little is known about the effect on oral pathogens. In this study, the effect of DFO on Porphyromonas gingivalis...

journal_title：FEMS microbiology letters

authors： Moon JH,Herr Y,Kim SW,Lee JY

更新日期：2011-10-01 00:00:00

abstract：:Pseudomonas aeruginosa strains exhibiting a heterogeneous mode of growth against carbapenems have been described recently. This study investigated the underlying molecular mechanisms in four genetically unrelated P. aeruginosa clinical isolates that were previously characterized by population analyses as heterogeneous...

journal_title：FEMS microbiology letters

authors： Ikonomidis A,Tsakris A,Kantzanou M,Spanakis N,Maniatis AN,Pournaras S

更新日期：2008-02-01 00:00:00

abstract：:Marine ammonia oxidising bacteria were enriched by incubation of sea water, amended with ammonium sulphate, and subsequent subculture in liquid inorganic medium. PCR primers were designed to be specific for rDNA sequences from ammonia oxidisers belonging to the beta-sub-group of the proteobacteria. These primers were ...

journal_title：FEMS microbiology letters

authors： McCaig AE,Embley TM,Prosser JI

更新日期：1994-07-15 00:00:00

abstract：:In addition to core Cas proteins, CRISPR-Cas loci often encode ancillary proteins that modulate the activity of the respective effectors in interference. Subtype VI-B1 CRISPR-Cas systems encode the Csx27 protein that down-regulates the activity of Cas13b when the type VI-B locus is expressed in Escherichia coli. We sh...

journal_title：FEMS microbiology letters

authors： Makarova KS,Gao L,Zhang F,Koonin EV

更新日期：2019-04-01 00:00:00

abstract：:The diversity of temperate bacteriophages was examined in 32 Mannheimia haemolytica, six Mannheimia glucosida and four Pasteurella trehalosi isolates. Phage particles were induced and identified by electron microscopy in 24 (75%) M. haemolytica isolates, but in only one (17%) M. glucosida and one (25%) P. trehalosi is...

journal_title：FEMS microbiology letters

authors： Davies RL,Lee I

更新日期：2006-07-01 00:00:00

abstract：:This study describes how bkaR, a highly conserved mycobacterial TetR-like transcriptional repressor, regulates a number of nearby genes that have associations with branched-chain keto-acid metabolism. bkaR (MSMEG_4718) was deleted from the nonpathogenic species Mycobacterium smegmatis, and changes in global gene expre...

journal_title：FEMS microbiology letters

authors： Balhana RJ,Swanston SN,Coade S,Withers M,Sikder MH,Stoker NG,Kendall SL

更新日期：2013-08-01 00:00:00

abstract：:The phyCg gene encoding a new phytase from Citrobacter gillenii was optimized, synthesized, cloned and expressed in Pichia pastoris. Analysis of the amino acid sequence of the enzyme showed that it belongs to the histidine acid phosphatase family. The amino acid sequence of the PhyCg phytase has the highest homology (...

journal_title：FEMS microbiology letters

authors： Tkachenko AA,Kalinina AN,Borshchevskaya LN,Sineoky SP,Gordeeva TL

更新日期：2020-12-21 00:00:00

abstract：:To elucidate the molecular mechanism by which the MexR repressor regulates expression of the MexAB-OprM efflux pump, we investigated MexR and the mexR-mexA intergenic DNA (mexOP) interaction, and transcription of the mexA-lacZ reporter gene containing different lengths of mexOP. Homogeneously purified MexR bound speci...

journal_title：FEMS microbiology letters

authors： Saito K,Eda S,Maseda H,Nakae T

更新日期：2001-02-05 00:00:00

abstract：:The aecA and aecB loci map at 250 and 290 degrees, respectively, on the Bacillus subtilis chromosomal genetic map. The aecB locus has been proposed as the structural gene for aspartokinase II. From DNA sequence analyses and comparisons to the sequence of the aspartokinase II gene, it can be concluded that the structur...

journal_title：FEMS microbiology letters

authors： Petricek M,Rutberg L,Hederstedt L

更新日期：1989-10-01 00:00:00

abstract：:During programs for the selection of enological yeasts, several hundred natural isolates are usually screened. The scope of these operations is to isolate strains possessing good fermentative properties without necessarily arriving at a precise species designation: in other words, to detect strains belonging to the Sa...

journal_title：FEMS microbiology letters

authors： Nardi T,Carlot M,De Bortoli E,Corich V,Giacomini A

更新日期：2006-11-01 00:00:00

abstract：:An inducible mycelial beta-glucosidase from Scytalidum thermophilum was characterized. The enzyme exhibited a pI of 6.5, a carbohydrate content of 15%, and an apparent molecular mass of about 40 kDa. Optima of temperature and pH were 60 degrees C and 6.5, respectively. The enzyme was stable up to 1 h at 50 degrees C a...

journal_title：FEMS microbiology letters

authors： Zanoelo FF,Polizeli Mde L,Terenzi HF,Jorge JA

更新日期：2004-11-15 00:00:00

abstract：:It is often taken for granted that all animals host and depend upon a microbiome, yet this has only been shown for a small proportion of species. We propose that animals span a continuum of reliance on microbial symbionts. At one end are the famously symbiont-dependent species such as aphids, humans, corals and cows, ...

journal_title：FEMS microbiology letters

authors： Hammer TJ,Sanders JG,Fierer N

更新日期：2019-05-01 00:00:00

abstract：:Desulfovibrio fructosovorans possesses two periplasmic hydrogenases (a nickel-iron and an iron hydrogenase) and a cytoplasmic NADP-dependent hydrogenase. The hydAB genes encoding the periplasmic iron hydrogenase were replaced, in the wild-type strain as well as in single mutants depleted of one of the other two hydrog...

journal_title：FEMS microbiology letters

authors： Casalot L,Valette O,De Luca G,Dermoun Z,Rousset M,de Philip P

更新日期：2002-08-27 00:00:00

abstract：:Helicobacter pylori possesses a gene (HP0326/JHP309) homologous to neuA of other bacteria, encoding a cytidyl monophosphate-N-acetylneuraminic acid synthetase-homologous enzyme in its N-terminal portion. We analysed the function of this gene, which is controlled by a flagellar class 2 sigma(54) promoter, in flagellar ...

journal_title：FEMS microbiology letters

authors： Josenhans C,Vossebein L,Friedrich S,Suerbaum S

更新日期：2002-05-07 00:00:00

abstract：:The hepA gene in Anabaena sp. strain PCC 7120 is required for normal formation of the polysaccharide layer of the heterocyst envelope. A plasmid bearing hepA, interrupted by a neomycin-resistance cassette, was transferred by conjugation to wild type Anabaena variabilis ATCC 29413, so that the interrupted hepA gene rep...

journal_title：FEMS microbiology letters

authors： Leganés F

更新日期：1994-10-15 00:00:00

abstract：:Five mutations in ccpA of Bacillus megaterium with impaired functions were analysed for carbon catabolite repression. The phenotypes support the hypothesis that CcpA assumes a PurR/LacI fold. The completely inactive mutants CcpA119GE and CcpA326am cause alterations which are incompatible with that fold. A mutation wit...

journal_title：FEMS microbiology letters

authors： Kraus A,Hillen W

更新日期：1997-08-01 00:00:00

abstract：:We recently described adhesion to and invasion of bovine mammary gland cells by Staphylococcus aureus in vitro. Here, we show that the levels of adhesion and invasion are dependent on the bacterial growth phase and are controlled by the agr locus. Incubation of exponential growth phase cells of S. aureus with mammary ...

journal_title：FEMS microbiology letters

authors： Lammers A,Nuijten PJ,Smith HE

更新日期：1999-11-01 00:00:00

abstract：:In Bacillus subtilis, carbon catabolite control is mediated by the regulatory protein CcpA. In addition to loss of catabolite repression, ccpA mutants exhibit a severe growth defect. They are not able to grow with glucose and ammonium as single sources of carbon and nitrogen, respectively. Only ccpA mutant strains car...

journal_title：FEMS microbiology letters

authors： Ludwig H,Stülke J

更新日期：2001-09-11 00:00:00

abstract：:The study was made of the antibacterial effects of three terpene alcohols on Staphylococcus aureus, focusing on the leakage of K+ ions and toxicity over time. The leakage of K+ ions was monitored continuously with a K+-electrode. Our results suggested that the terpene alcohols, namely, farnesol, nerolidol and plaunoto...

journal_title：FEMS microbiology letters

authors： Inoue Y,Shiraishi A,Hada T,Hirose K,Hamashima H,Shimada J

更新日期：2004-08-15 00:00:00

abstract：:The sequences of the epidermolytic toxins and V8 serine proteinase share about 25% identity, including the catalytic triad at the proteinase active centre. Here we have altered the putative ETA active-site serine-195 to glycine by site-directed mutagenesis. No epidermolytic activity was detected when up to 100-fold gr...

journal_title：FEMS microbiology letters

authors： Redpath MB,Foster TJ,Bailey CJ

更新日期：1991-06-15 00:00:00

abstract：:Cell wall LPS of Escherichia coli are organized as particles which are visible in the electron microscope, after treatment of the wall with alkali. We now describe alkali treated walls of three E. coli strains with differences in susceptibility to the T4 phage infection. Strain CR63, a usual host for the T4 phage, sho...

journal_title：FEMS microbiology letters

authors： Zorzopulos J,de Long S,Chapman V,Kozloff LM

更新日期：1989-10-01 00:00:00

abstract：:Research devoted to uncovering the mechanisms of adherence of Candida albicans to human tissue is reviewed. The physical aspects of adherence of the fungus to host cells and the biochemical and molecular features, as far as they are known, are discussed. Relevant pre- and post-adherence events in the pathogenesis of d...

journal_title：FEMS microbiology letters

authors： Pendrak ML,Klotz SA

更新日期：1995-06-15 00:00:00

abstract：:The agp gene encoding the ADP-glucose pyrophosphorylase is involved in cyanobacterial glycogen synthesis and glucosylglycerol formation. By in vitro DNA recombination technology, a mutant with partial deletion of agp gene in the cyanobacterium Synechocystis sp. PCC 6803 was constructed. This mutant could not synthesiz...

journal_title：FEMS microbiology letters

authors： Miao X,Wu Q,Wu G,Zhao N

更新日期：2003-01-21 00:00:00

abstract：:As shown by both bioassay and high-performance liquid chromatographic (HPLC) analysis, penicillin G production by Aspergillus nidulans is subject to regulation by the pH of the growth medium. Penicillin titres were highest at alkaline pH and in strains carrying mutations in the regulatory gene pacC which mimics the ef...

journal_title：FEMS microbiology letters

authors： Shah AJ,Tilburn J,Adlard MW,Arst HN Jr

更新日期：1991-01-15 00:00:00

abstract：:Two L-methionine-enriched mutants, SN-78 and SE-57, were isolated in a sulphur-deficient medium from the methylotrophic yeast Candida boidinii ICCF26. No significant differences were detected between the L-cysteine pools of the mutants and the wild-type. In mutant strain SE-57, S-adenosylmethionine and ergosterol leve...

journal_title：FEMS microbiology letters

authors： Avram D,Stan R

更新日期：1992-11-01 00:00:00

abstract：:It is known that certain yeast strains, so called 'killers', can produce and excrete proteinaceous toxins that can induce death of other sensitive strains. We obtained a stable fungicidal factor (SKF) through concentration and stabilization of the excretion product of certain killer strains of Saccharomyces cerevisiae...

journal_title：FEMS microbiology letters

authors： Bracesco N,Salvo VA,Carrau FM,Nunes E

更新日期：2006-03-01 00:00:00

abstract：:Mycobacterium leprae, an obligate intracellular pathogen, shows a unique tropism for Schwann cells (SC). This leads to the peripheral neuropathy disorder observed in leprosy. In this study, we investigated signal transduction events and the intracellular fate of M. leprae during the interaction of the microorganism wi...

journal_title：FEMS microbiology letters

authors： Alves L,de Mendonça Lima L,da Silva Maeda E,Carvalho L,Holy J,Sarno EN,Pessolani MC,Barker LP

更新日期：2004-09-15 00:00:00

abstract：:The growth of Mycobacterium microti was inhibited within J774A.1 macrophage cells activated with either interferon-gamma or tumor necrosis factor-alpha. Activation with interferon-gamma or tumor necrosis factor-alpha alone did not stimulate the production of nitrite in J774A.1 cells. Interferon-gamma but not tumor nec...

journal_title：FEMS microbiology letters

authors： Gupta R,Dogra N,Raje M,Majumder S

更新日期：1996-07-01 00:00:00

abstract：:Biochemical responses to cold and osmotic stresses overlap because each decreases the availability of free water. Since RNA-binding proteins are known to accumulate following cold stress and play key roles in regulating transcription termination, the effect of osmotic stress on expression of RNA-binding proteins was e...

journal_title：FEMS microbiology letters

authors： Mori S,Castoreno A,Mulligan ME,Lammers PJ

更新日期：2003-10-24 00:00:00

abstract：:Five independent collections, comprising a total of 34 clones encoding cellulases, hemicellulases and cell surface proteins of Clostridium thermocellum, were searched for overlapping or contiguous DNA fragments. The clones were hybridized to large genomic restriction fragments separated by pulse-field electrophoresis....

journal_title：FEMS microbiology letters

authors： Guglielmi G,Béguin P

更新日期：1998-04-01 00:00:00