Transcriptional repressor Rex is involved in regulation of oxidative stress response and biofilm formation by Streptococcus mutans.

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：:The study compared images of mature Streptococcus mutans biofilms captured at increasing magnification to determine which microscopy method is most acceptable for imaging the biofilm topography and the extracellular polymeric substance (EPS). In vitro S. mutans biofilms were imaged using (1) scanning electron microsco...

journal_title：FEMS microbiology letters

authors： Weber K,Delben J,Bromage TG,Duarte S

更新日期：2014-01-01 00:00:00

abstract：:The activities of some enzymes belonging to the Leloir pathway, phosphoglucomutase, UDP-glucose pyrophosphorylase, UDP-galactose 4-epimerase and galactose 1-P uridyl transferase, were studied in a wild ropy, a non-ropy and an overproducing mutant ropy strain of Streptococcus thermophilus. These activities were assayed...

journal_title：FEMS microbiology letters

authors： Escalante A,Villegas J,Wacher C,García-Garibay M,Farrés A

更新日期：2002-04-09 00:00:00

abstract：:Interest in endophytes as natural sources for new medicines was inspired by the discovery of paclitaxel-producing endophytic fungi. This study investigated the anti-cancer activity of extracts of endophytes isolated from two Australian plants, Eremophila longifolia (EL) and Eremophila maculata (EM). Endophytes were is...

journal_title：FEMS microbiology letters

authors： Zaferanloo B,Pepper SA,Coulthard SA,Redfern CPF,Palombo EA

更新日期：2018-05-01 00:00:00

abstract：:The RpoS sigma factor is required for the transition of Escherichia coli into stationary phase, as well as adaptation to environmental stresses and nutrient depletion. In this study, we report that under nutrient poor conditions, RpoS protein accumulation in E. coli was strongly enhanced by a secreted factor. Expressi...

journal_title：FEMS microbiology letters

authors： Holland AM,Rather PN

更新日期：2008-09-01 00:00:00

abstract：:Staphylococcus aureus lipase (SAL) is known to possess broad substrate specificity for triacylglycerides. We found that a sub-minimum inhibitory concentration of farnesol (1000 mg L(-1)) inhibits this lipase activity on a Mueller-Hinton agar containing 1% Tween substrates. A quantitative lipase assay using p-nitrophen...

journal_title：FEMS microbiology letters

authors： Kuroda M,Nagasaki S,Ito R,Ohta T

更新日期：2007-08-01 00:00:00

abstract：:Many antibiotic-producing actinomycetes possess at least one ABC (ATP-binding cassette) transporter which forms part of the antibiotic biosynthetic pathway and in most cases confers resistance to the drug in an heterologous host. Three types of antibiotic ABC transporters have been so far described in producer organis...

journal_title：FEMS microbiology letters

authors： Méndez C,Salas JA

更新日期：1998-01-01 00:00:00

abstract：:Two thermostable phytases were identified from Thai isolates of Aspergillus japonicus BCC18313 (TR86) and Aspergillus niger BCC18081 (TR170). Both genes of 1404 bp length, coding for putative phytases of 468 amino acid residues, were cloned and transferred into Pichia pastoris. The recombinant phytases, r-PhyA86 and r...

journal_title：FEMS microbiology letters

authors： Promdonkoy P,Tang K,Sornlake W,Harnpicharnchai P,Kobayashi RS,Ruanglek V,Upathanpreecha T,Vesaratchavest M,Eurwilaichitr L,Tanapongpipat S

更新日期：2009-01-01 00:00:00

abstract：:pH is a key environmental factor affecting the physiology, ecology and pathogenicity of the oral biofilms colonizing the hard tissues of the human mouth. Much attention has been focused on the production of organic acids through the metabolism of carbohydrates by pathogenic oral bacteria. Now, evidence is emerging tha...

journal_title：FEMS microbiology letters

authors： Burne RA,Marquis RE

更新日期：2000-12-01 00:00:00

abstract：:Rhizobium sp. SIN-1, isolated in India from root nodules on the tropical legume Sesbania aculeata, also induces nitrogen-fixing nodules on roots of S. macrocarpa, S. speciosa, S. procumbens, S. punicea, S. rostrata, and Vigna unguiculata. Unlike Azorhizobium caulinodans, SIN-1 does not induce stem nodules on S. rostra...

journal_title：FEMS microbiology letters

authors： Rana D,Krishnan HB

更新日期：1995-12-01 00:00:00

abstract：:The flagellins of Methanospirillum hungatei strains JF1 and GP1, Methanococcus deltae, and Methanothermus fervidus are glycosylated. Isolated flagellar filaments from these organisms are dissociated by low concentrations (0.5% (v/v)) of Triton X-100. Flagellar filaments from other methanogens (Methanococcus voltae, Me...

journal_title：FEMS microbiology letters

authors： Faguy DM,Koval SF,Jarrell KF

更新日期：1992-01-01 00:00:00

abstract：:Two cDNAs encoding feedback inhibition-insensitive serine acetyltransferases of Arabidopsis thaliana were expressed in the chromosomal serine acetyltransferase-deficient and L-cysteine non-utilizing Escherichia coli strain JM39-8. The transformants produced 1600 to 1700 mg l(-1) of L-cysteine and L-cystine from glucos...

journal_title：FEMS microbiology letters

authors： Takagi H,Awano N,Kobayashi S,Noji M,Saito K,Nakamori S

更新日期：1999-10-15 00:00:00

abstract：:Penicillium expansum is the causal agent of blue mold rot, a postharvest decay of stored fruits. This fungus also produces the mycotoxins patulin and citrinin. Control of P. expansum still relies mainly on the use of fungicides such as thiabendazole. Since its introduction, resistant strains have been reported. The ai...

journal_title：FEMS microbiology letters

authors： Cabañas R,Castellá G,Abarca ML,Bragulat MR,Cabañes FJ

更新日期：2009-08-01 00:00:00

abstract：:Bacillus anthracis lethal toxin (PALF) stimulated the proliferation of human peripheral blood T-cells in vitro. Activation of T-lymphocytes by PALF required the presence of monocytes and did not result from a collaborative effect between T-cells and B-cells. PALF acted directly on monocytes and independently of T-cell...

journal_title：FEMS microbiology letters

authors： Guidi-Rontani C,Duflot E,Mock M

更新日期：1997-12-15 00:00:00

abstract：:Bacillus anthracis can be identified on the basis of the detection of virulence factor genes located on two plasmids, pXO1 and pXO2. Thus isolates lacking both pXO1 and pXO2 are indistinguishable from closely related B. cereus group bacteria. We developed a multiplex PCR assay for characterization of B. anthracis isol...

journal_title：FEMS microbiology letters

authors： Ramisse V,Patra G,Garrigue H,Guesdon JL,Mock M

更新日期：1996-11-15 00:00:00

abstract：:CheY, the response regulator of the chemotaxis system in Escherichia coli, can be regulated by two covalent modifications - phosphorylation and acetylation. Both covalent modifications are involved in chemotaxis, but the mechanism and role of the acetylation are still obscure. While acetylation was shown to repress th...

journal_title：FEMS microbiology letters

authors： Li R,Chen P,Gu J,Deng JY

更新日期：2013-10-01 00:00:00

abstract：:The impact of four electron acceptors on hydrocarbon-induced methanogenesis was studied. Methanogenesis from residual hydrocarbons may enhance the exploitation of oil reservoirs and may improve bioremediation. The conditions to drive the rate-limiting first hydrocarbon-oxidizing steps for the conversion of hydrocarbon...

journal_title：FEMS microbiology letters

authors： Siegert M,Cichocka D,Herrmann S,Gründger F,Feisthauer S,Richnow HH,Springael D,Krüger M

更新日期：2011-02-01 00:00:00

abstract：:Tolerance of the foodborne pathogen Listeria monocytogenes to sublethal concentrations of disinfectants has been frequently reported. Particularly, quaternary ammonium compounds (QACs) such as benzalkonium chloride (BC) are often used in disinfectants and also as antiseptics in food industry and hospitals. Recently, w...

journal_title：FEMS microbiology letters

authors： Müller A,Rychli K,Zaiser A,Wieser C,Wagner M,Schmitz-Esser S

更新日期：2014-12-01 00:00:00

abstract：:FNR is an iron-binding transcriptional regulator of Escherichia coli which controls the expression of target genes in response to anaerobiosis. The mechanism used by FNR to sense and respond to anaerobiosis is unknown but it is thought to involve iron. In vitro transcription analyses have shown that iron-deficient FNR...

journal_title：FEMS microbiology letters

authors： Green J,Guest JR

更新日期：1993-10-15 00:00:00

abstract：:L-allo-Threonine aldolase (L-allo-threonine acetaldehyde-lyase), which exhibited specificity for L-allo-threonine but not for L-threonine, was purified from a cell-free extract of Aeromonas jandaei DK-39. The purified enzyme catalyzed the aldol cleavage reaction of L-allo-threonine (K(m) = 1.45 mM, Vmax = 45.2 mumol m...

journal_title：FEMS microbiology letters

authors： Kataoka M,Wada M,Nishi K,Yamada H,Shimizu S

更新日期：1997-06-15 00:00:00

abstract：:Mixed-substrate conversions are an under-regarded option to fix carbon dioxide in significant amounts. In such a conversion, carbon dioxide together with one other carbon source such as glucose is converted to a single carbon product. With mixed-substrate conversions, it is possible to incorporate carbon dioxide into ...

journal_title：FEMS microbiology letters

authors： Steiger MG,Mattanovich D,Sauer M

更新日期：2017-11-15 00:00:00

abstract：:A compound with siderophore activity was purified by successive column and thin layer chromatographic procedures from Dowex 1 x 8 extracts of culture supernatants of Vibrio parahaemolyticus AQ 3354. The strain synthesized the compound in culture media containing less than 2 microM added FeCl3. Hydrolysis of the compou...

journal_title：FEMS microbiology letters

authors： Yamamoto S,Fujita Y,Okujo N,Minami C,Matsuura S,Shinoda S

更新日期：1992-07-01 00:00:00

abstract：:The flaA gene, which codes for the Spirochaeta aurantia flagellar filament outer layer polypeptide, FlaA, was cloned, sequenced and analysed. The gene appears to be transcribed into a monocistronic mRNA from a sigma 70-like promoter. The translational start is 31 base pairs after the start of the transcript, the open ...

journal_title：FEMS microbiology letters

authors： Parales J Jr,Greenberg EP

更新日期：1993-02-01 00:00:00

abstract：:Bacillus cereus is becoming one of the more important causes of food poisoning in the industrialised world. It produces one emetic toxin and three different enterotoxins. The emetic toxin is a ring-shaped structure of three repeats of four amino and/or oxy acids: [D-O-Leu-D-Ala-L-O-Val-L-Val]3. This ring structure has...

journal_title：FEMS microbiology letters

authors： Granum PE,Lund T

更新日期：1997-12-15 00:00:00

abstract：:Hopanoid fingerprints allowed to differentiate bacteria formerly connected to the genus Pseudomonas. Whereas all strains related to Pseudomonas and Ralstonia were devoid of any detectable hopanoid, these pentacyclic triterpenoids were found in the Burkholderia species and in related soil isolates, which contained as m...

journal_title：FEMS microbiology letters

authors： Cvejic JH,Putra SR,El-Beltagy A,Hattori R,Hattori T,Rohmer M

更新日期：2000-02-15 00:00:00

abstract：:Non-linear dielectric spectroscopy is a novel technique for determining the activity of (predominantly) membranous enzymes as their ability to generate harmonics when excited with a sinusoidal electrical field. In washed suspensions of yeast cells, the ability to generate harmonics is inhibited by low concentrations o...

journal_title：FEMS microbiology letters

authors： Woodward AM,Kell DB

更新日期：1991-11-01 00:00:00

abstract：:A gene encoding a phosphomannose isomerase from Streptococcus mutans GS-5 was identified immediately downstream from the fructokinase gene, scrK. Nucleotide sequence analysis of this region revealed an open reading frame (ORF) specifying a putative protein of 316 amino acids. The gene cloned in Escherichia coli expres...

journal_title：FEMS microbiology letters

authors： Sato Y,Yamamoto Y,Kizaki H,Kuramitsu HK

更新日期：1993-11-15 00:00:00

abstract：:Burkholderia pseudomallei, a Gram-negative bacterium is found in the soil and water, mainly in Southeast Asia and Northern Australia. It is responsible for melioidosis in human and animals. The bacteria produce several potential virulent factors such as extracellular protease, hemolysin, lipase and lecithinase. The is...

journal_title：FEMS microbiology letters

authors： Lee MA,Liu Y

更新日期：2000-11-01 00:00:00

abstract：:Klebsiella pneumoniae 287-w carries three small narrow host range (NHR) plasmids (pIGMS31, pIGMS32, and pIGRK), which could be maintained in several closely related species of Gammaproteobacteria, but not in Alphaproteobacteria. The plasmids contain different mobilization systems (MOB), whose activity in Escherichia c...

journal_title：FEMS microbiology letters

authors： Smorawinska M,Szuplewska M,Zaleski P,Wawrzyniak P,Maj A,Plucienniczak A,Bartosik D

更新日期：2012-01-01 00:00:00

abstract：:Using primers corresponding to conserved regions of the bacterial regulatory gene fur, a homologue of this gene from the genome of Rhizobium leguminosarum biovar viciae, the nitrogen-fixing symbiont of peas, was isolated and sequenced. The fur gene is normally expressed constitutively, independent of the presence of F...

journal_title：FEMS microbiology letters

authors： de Luca NG,Wexler M,Pereira MJ,Yeoman KH,Johnston AW

更新日期：1998-11-15 00:00:00