Dramatic activation of antibiotic production in Streptomyces coelicolor by cumulative drug resistance mutations.

abstract：:We demonstrate that enhanced lysozyme resistance of enteropathogenic Escherichia coli requires the plasmid-encoded regulator, Per, and is mediated by factors outside the locus for enterocyte effacement. EspC, a Per-activated serine protease autotransporter protein, conferred enhanced resistance on nonpathogenic E. col...

journal_title：Applied and environmental microbiology

authors： Salinger N,Kokona B,Fairman R,Okeke IN

更新日期：2009-01-01 00:00:00

abstract：:We have analyzed the impact of surface-to-volume ratio on final bacterial concentrations after batch growth. We examined six bottle sizes (20 to 1,000 ml) using three independent enumeration methods to quantify growth. We found no evidence of a so-called volumetric bottle effect, thus contradicting numerous previous r...

journal_title：Applied and environmental microbiology

authors： Hammes F,Vital M,Egli T

更新日期：2010-02-01 00:00:00

abstract：:Most of the edible mushrooms cannot be cultivated or have low yield under industrial conditions, partially due to the lack of knowledge on how basidioma (fruiting body) development is regulated. From winter mushroom (Flammulina velutipes), one of the most popular industrially cultivated mushrooms, a transcription fact...

journal_title：Applied and environmental microbiology

authors： Wu T,Hu C,Xie B,Zhang L,Yan S,Wang W,Tao Y,Li S

更新日期：2019-11-27 00:00:00

abstract：UNLABELLED:By combining genomics and isotope imaging analysis using high-resolution secondary ion mass spectrometry (NanoSIMS), we examined the function and evolution of Bacteroidales ectosymbionts of the protist Barbulanympha from the hindguts of the wood-eating cockroach Cryptocercus punctulatus In particular, we inv...

journal_title：Applied and environmental microbiology

authors： Tai V,Carpenter KJ,Weber PK,Nalepa CA,Perlman SJ,Keeling PJ

更新日期：2016-07-15 00:00:00

abstract：:Cellulose is an abundant and renewable biopolymer that can be used for biofuel generation; however, structural entrapment with other cell wall components hinders enzyme-substrate interactions, a key bottleneck for ethanol production. Biomass is routinely subjected to treatments that facilitate cellulase-cellulose cont...

journal_title：Applied and environmental microbiology

authors： Wang H,Squina F,Segato F,Mort A,Lee D,Pappan K,Prade R

更新日期：2011-08-01 00:00:00

abstract：:Two new nickel-resistant strains of Alcaligenes species were selected from a large number (about 400) of strains isolated from ecosystems polluted by heavy metals and were studied on the physiological and molecular level. Alcaligenes xylosoxydans 31A is a heterotrophic bacterium, and Alcaligenes eutrophus KTO2 is an a...

journal_title：Applied and environmental microbiology

authors： Schmidt T,Stoppel RD,Schlegel HG

更新日期：1991-11-01 00:00:00

abstract：:Nonselected and natural populations of Escherichia coli from 12 animal sources and humans were examined for the presence and types of 14 tetracycline resistance determinants. Of 1,263 unique E. coli isolates from humans, pigs, chickens, turkeys, sheep, cows, goats, cats, dogs, horses, geese, ducks, and deer, 31% were ...

journal_title：Applied and environmental microbiology

authors： Bryan A,Shapir N,Sadowsky MJ

更新日期：2004-04-01 00:00:00

abstract：:The prokaryote community activity and structural characteristics within marine sediment sampled across a continental shelf area located off eastern Antarctica (66 degrees S, 143 degrees E; depth range, 709 to 964 m) were studied. Correlations were found between microbial biomass and aminopeptidase and chitinase rates,...

journal_title：Applied and environmental microbiology

authors： Bowman JP,McCammon SA,Gibson JA,Robertson L,Nichols PD

更新日期：2003-05-01 00:00:00

abstract：:Trehalose, a disaccharide accumulated by many microorganisms, acts as a protectant during periods of physiological stress, such as salinity and desiccation. Previous studies reported that the trehalose biosynthetic genes (otsA, treS, and treY) in Bradyrhizobium japonicum were induced by salinity and desiccation stress...

journal_title：Applied and environmental microbiology

authors： Sugawara M,Cytryn EJ,Sadowsky MJ

更新日期：2010-02-01 00:00:00

abstract：:The transmission of Escherichia coli O157:H7 from manure-contaminated soil and irrigation water to lettuce plants was demonstrated using laser scanning confocal microscopy, epifluorescence microscopy, and recovery of viable cells from the inner tissues of plants. E. coli O157:H7 migrated to internal locations in plant...

journal_title：Applied and environmental microbiology

authors： Solomon EB,Yaron S,Matthews KR

更新日期：2002-01-01 00:00:00

abstract：:The addition of positively charged colloidal materials to the growth medium markedly increased the concentration of cellulase enzymes produced by Trichoderma reesei Rut-C30. Filter paper activities of up to 4 and 13 IU/ml have been achieved by the addition of colloidal materials, using 3% lactose and 3% cellulose, res...

journal_title：Applied and environmental microbiology

authors： Duff SJ,Cooper DG,Fuller OM

更新日期：1985-04-01 00:00:00

abstract：:7 alpha-Dehydroxylation of cholic acid and chenodeoxycholic acid by whole cells of strain c-25, a Eubacterium lentum-like intestinal anaerobe, was studied. 7 alpha-Dehydroxylase activity was observed only in whole cells grown in the presence of the primary bile acid (cholic acid or chenodeoxycholic acid). Chenodeoxych...

journal_title：Applied and environmental microbiology

authors： Masuda N,Oda H,Hirano S,Masuda M,Tanaka H

更新日期：1984-04-01 00:00:00

abstract：:Symbioses with gut microorganisms provides a means by which terrestrial herbivores are able to obtain energy. These microorganisms ferment cell wall materials of plants to short-chain fatty acids (SCFA), which are then absorbed and used by the host animal. Many marine herbivorous fishes contain SCFA (predominantly ace...

journal_title：Applied and environmental microbiology

authors： Mountfort DO,Campbell J,Clements KD

更新日期：2002-03-01 00:00:00

abstract：:A Pseudomonas putida strain (MC4) that can utilize 2,3-dichloro-1-propanol (DCP) and several aliphatic haloacids and haloalcohols as sole carbon and energy source for growth was isolated from contaminated soil. Degradation of DCP was found to start with oxidation and concomitant dehalogenation catalyzed by a 72-kDa mo...

journal_title：Applied and environmental microbiology

authors： Arif MI,Samin G,van Leeuwen JG,Oppentocht J,Janssen DB

更新日期：2012-09-01 00:00:00

abstract：:Rhizobium fredii USDA 206 harbors four large plasmids, one of which carries nodulation and nitrogen fixation genes. Previously isolated groups of plasmid-cured derivatives of strain USDA 206 were compared with each other to determine possible plasmid functions. Mutant strain 206CANS was isolated as a nonmucoid (Muc) d...

journal_title：Applied and environmental microbiology

authors： Barbour WM,Elkan GH

更新日期：1989-04-01 00:00:00

abstract：:A mutant (furA3) was isolated from the S1 wild-type strain of Nectria haematococca on the basis of its resistance to 5-fluorouracil (5FU). This mutant has greatly reduced activity of uracil phosphoribosyltransferase, a pyrimidine salvage enzyme catalyzing the synthesis of UMP from uracil. The metabolism of 5FU was exa...

journal_title：Applied and environmental microbiology

authors： Parisot D,Malet-Martino MC,Crasnier P,Martino R

更新日期：1989-10-01 00:00:00

abstract：:Inhibition of enzyme activity by high concentrations of substrate and/or cofactor is a general phenomenon demonstrated in many enzymes, including aldehyde dehydrogenases. Here we show that the uncharacterized protein BetB (SA2613) from Staphylococcus aureus is a highly specific betaine aldehyde dehydrogenase, which ex...

journal_title：Applied and environmental microbiology

authors： Chen C,Joo JC,Brown G,Stolnikova E,Halavaty AS,Savchenko A,Anderson WF,Yakunin AF

更新日期：2014-07-01 00:00:00

abstract：:The inactivation of catechol 2,3-dioxygenase from Pseudomonas putida mt-2 by 3-chloro- and 3-fluorocatechol and the iron-chelating agent Tiron (catechol-3,5-disulfonate) was studied. Whereas inactivation by Tiron is an oxygen-independent and mostly reversible process, inactivation by the 3-halocatechols was only obser...

journal_title：Applied and environmental microbiology

authors： Bartels I,Knackmuss HJ,Reineke W

更新日期：1984-03-01 00:00:00

abstract：:Six monoclonal antibodies directed against enterobacteria were produced and characterized. The specificity of one of these antibodies (CX9/15; immunoglobulin G2a) was studied by indirect immunofluorescence against 259 enterobacterial strains and 125 other gram-negative bacteria. All of the enterobacteria were specific...

journal_title：Applied and environmental microbiology

authors： Levasseur S,Husson MO,Leitz R,Merlin F,Laurent F,Peladan F,Drocourt JL,Leclerc H,Van Hoegaerden M

更新日期：1992-05-01 00:00:00

abstract：:The rhizobial bacterium Bradyrhizobium japonicum functions as a nitrogen-fixing symbiont of the soybean plant (Glycine max). Plants are capable of producing an oxidative burst, a rapid proliferation of reactive oxygen species (ROS), as a defense mechanism against pathogenic and symbiotic bacteria. Therefore, B. japoni...

journal_title：Applied and environmental microbiology

authors： Donati AJ,Jeon JM,Sangurdekar D,So JS,Chang WS

更新日期：2011-06-01 00:00:00

abstract：:A total of 114 gram-negative fecal isolates from domestic pigs in herds with different histories of antimicrobial agent exposure were screened for the presence of plasmid DNA and specific tetracycline resistance determinants. More than 84% of the isolates harbored plasmid DNA, which ranged in size from 2.1 to 186 kb. ...

journal_title：Applied and environmental microbiology

authors： Lee C,Langlois BE,Dawson KA

更新日期：1993-05-01 00:00:00

abstract：:We describe a novel quantitative real-time (Q)-PCR assay for Listeria monocytogenes based on the coamplification of a target hly gene fragment and an internal amplification control (IAC). The IAC is a chimeric double-stranded DNA containing a fragment of the rapeseed BnACCg8 gene flanked by the hly-specific target seq...

journal_title：Applied and environmental microbiology

authors： Rodríguez-Lázaro D,Pla M,Scortti M,Monzó HJ,Vázquez-Boland JA

更新日期：2005-12-01 00:00:00

abstract：:The transcription factors sinR and abrB are involved in the control of sporulation initiation in Bacillus subtilis. We identified a single homologue to sinR and three highly similar homologues to abrB, designated abrB310, abrB1941, and abrB3647, in Clostridium acetobutylicum ATCC 824. Using reporter vectors, we showed...

journal_title：Applied and environmental microbiology

authors： Scotcher MC,Rudolph FB,Bennett GN

更新日期：2005-04-01 00:00:00

abstract：:Plasmodium falciparum, in addition to scavenging essential fatty acids from its intra- and intercellular environments, possesses a functional complement of type II fatty acid synthase (FAS) enzymes targeted to the apicoplast organelle. Recent evidence suggests that products of the plasmodial FAS II system may be criti...

journal_title：Applied and environmental microbiology

authors： Du Y,Gisselberg JE,Johnson JD,Lee PJ,Prigge ST,Bachmann BO

更新日期：2010-06-01 00:00:00

abstract：:Although carbon dioxide (CO(2)) is known to inhibit growth of most bacteria, very little is known about the cellular response. The food-borne pathogen Listeria monocytogenes is characterized by its ability to grow in high CO(2) concentrations at refrigeration temperatures. We examined the listerial responses of differ...

journal_title：Applied and environmental microbiology

authors： Jydegaard-Axelsen AM,Høiby PE,Holmstrøm K,Russell N,Knøchel S

更新日期：2004-07-01 00:00:00

abstract：:Free fatty acids are important flavor compounds in cheese. Propionibacterium freudenreichii is the main agent of their release through lipolysis in Swiss cheese. Our aim was to identify the esterase(s) involved in lipolysis by P. freudenreichii. We targeted two previously identified esterases: one secreted esterase, P...

journal_title：Applied and environmental microbiology

authors： Abeijón Mukdsi MC,Falentin H,Maillard MB,Chuat V,Medina RB,Parayre S,Thierry A

更新日期：2014-01-01 00:00:00

abstract：:Many marine fish harbor luminous bacteria as bioluminescent symbionts. Despite the diversity, abundance, and ecological importance of these fish and their apparent dependence on luminous bacteria for survival and reproduction, little is known about developmental and microbiological events surrounding the inception of ...

journal_title：Applied and environmental microbiology

authors： Dunlap PV,Davis KM,Tomiyama S,Fujino M,Fukui A

更新日期：2008-12-01 00:00:00

abstract：:To prevent transmission of mycobacterial pathogens, medical devices must be disinfected by germicides with proven mycobactericidal activity. The quantitative carrier test EN 14563 provides an international standard for evaluation of the mycobactericidal activity of disinfectants under practical conditions. However, te...

journal_title：Applied and environmental microbiology

authors： Steinhauer K,Eschenbacher I,Radischat N,Detsch C,Niederweis M,Goroncy-Bermes P

更新日期：2010-01-01 00:00:00

abstract：:Laboratory conditions have been identified that cause the rapid death of cultures of cyanobacteria producing urease. Once the death phase had initiated in the stationary growth phase, cells were rapidly bleached of all pigmentation. Null mutations in the ureC gene, encoding the alpha subunit of urease, were constructe...

journal_title：Applied and environmental microbiology

authors： Sakamoto T,Delgaizo VB,Bryant DA

更新日期：1998-07-01 00:00:00

abstract：:Fermentative production of succinic acid from glucose by Escherichia coli was significantly increased by overexpression of phosphoenolpyruvate carboxylase. In contrast, overexpression of phosphoenolpyruvate carboxykinase had no effect. Under optimized conditions, induction of the carboxylase resulted in a 3.5-fold inc...

journal_title：Applied and environmental microbiology

authors： Millard CS,Chao YP,Liao JC,Donnelly MI

更新日期：1996-05-01 00:00:00