Operon
Mostrando 1-12 de 5457 artigos, teses e dissertações.
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1. Study of pandrug and heavy metal resistance among E. coli from anthropogenically influenced Delhi stretch of river Yamuna
Abstract Escalating burden of antibiotic resistance that has reached new heights present a grave concern to mankind. As the problem is no longer confined to clinics, we hereby report identification of a pandrug resistant Escherichia coli isolate from heavily polluted Delhi stretch of river Yamuna, India. E. coli MRC11 was found sensitive only to tobramycin a
Braz. J. Microbiol.. Publicado em: 2018-09
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2. Bradyrhizobium elkanii nod regulon: insights through genomic analysis
Abstract A successful symbiotic relationship between soybean [Glycine max (L.) Merr.] and Bradyrhizobium species requires expression of the bacterial structural nod genes that encode for the synthesis of lipochitooligosaccharide nodulation signal molecules, known as Nod factors (NFs). Bradyrhizobium diazoefficiens USDA 110 possesses a wide nodulation gene re
Genet. Mol. Biol.. Publicado em: 31/07/2017
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3. Participation of the arcRACME protein in self-activation of the arc operon located in the arginine catabolism mobile element in pandemic clone USA300
ABSTRACT Staphylococcus aureus pandemic clone USA300 has, in addition to its constitutive arginine catabolism (arc) gene cluster, an arginine catabolism mobile element (ACME) carrying another such cluster, which gives this clone advantages in colonisation and infection. Gene arcR, which encodes an oxygen-sensitive transcriptional regulator, is inside ACME an
Mem. Inst. Oswaldo Cruz. Publicado em: 2017-07
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4. Genome sequence of Bradyrhizobium embrapense strain CNPSo 2833T, isolated from a root nodule of Desmodium heterocarpon
Abstract Bradyrhizobium embrapense CNPSo 2833T is a nitrogen-fixing symbiont of the legume pasture Desmodium. Its draft genome contains 8,267,832 bp and 7876 CDSs. The symbiotic island includes nodulation and nitrogen fixation genes resembling the operon organization of B. japonicum. Several CDSs related to secretion proteins and stress tolerance were also i
Braz. J. Microbiol.. Publicado em: 2017-03
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5. Molecular epidemiology of coagulase-negative bloodstream isolates: detection of Staphylococcus epidermidis ST2, ST7 and linezolid-resistant ST23
Abstract The mechanisms contributing to persistence of coagulase-negative staphylococci are diverse; to better understanding of their dynamics, the characterization of nosocomial isolates is needed. Our aim was to characterize phenotypic and molecular characteristics of Staphylococcus epidermidis and Staphylococcus haemolyticus human blood isolates from two
Braz J Infect Dis. Publicado em: 2016-10
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6. Characterization of the
hrpZ gene fromPseudomonas syringae pv.maculicola M2Pseudomonas syringae pv.maculicola is a natural pathogen of members of the Brassicaceae plant family. Using a transposon-based mutagenesis strategy inPseudomonas syringae pv.maculicola M2 (PsmM2), we conducted a genetic screen to identify mutants that were capable of growing in M9 mediuBraz. J. Microbiol.. Publicado em: 2015-09
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7. A nuclear ribosomal DNA pseudogene in triatomines opens a new research field of fundamental and applied implications in Chagas disease
A pseudogene, designated as "ps(5.8S+ITS-2)", paralogous to the 5.8S gene and internal transcribed spacer (ITS)-2 of the nuclear ribosomal DNA (rDNA), has been recently found in many triatomine species distributed throughout North America, Central America and northern South America. Among characteristics used as criteria for pseudogene verification, secondar
Mem. Inst. Oswaldo Cruz. Publicado em: 06/03/2015
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8. Regulation of gene expression: Cryptic β-glucoside (bgl) operon of Escherichia coli as a paradigm
Bacteria have evolved various mechanisms to extract utilizable substrates from available resources and consequently acquire fitness advantage over competitors. One of the strategies is the exploitation of cryptic cellular functions encoded by genetic systems that are silent under laboratory conditions, such as the bgl (β-glucoside) operon of E. coli. The bg
Braz. J. Microbiol.. Publicado em: 2014-12
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9. Reduced susceptibility to vancomycin and biofilm formation in methicillin-resistant Staphylococcus epidermidis isolated from blood cultures
This study aimed to correlate the presence of ica genes, biofilm formation and antimicrobial resistance in 107 strains of Staphylococcus epidermidis isolated from blood cultures. The isolates were analysed to determine their methicillin resistance, staphylococcal cassette chromosome mec (SCCmec) type, ica genes and biofilm formation and the vancomycin minimu
Mem. Inst. Oswaldo Cruz. Publicado em: 21/10/2014
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10. Caracterização de genótipos de cebola com a utilização de marcadores moleculares RAPD
A divergência genética foi avaliada entre quinze genótipos de cebola cultivados em Santa Catarina, com a utilização de marcadores moleculares RAPD. Onze oligonucleotídeos iniciadores da série Operon Technologies foram utilizados e produziram 35 marcadores, destes, 28 foram polimórficos. Os produtos da amplificação foram visualizados em gel de agaro
Rev. Ciênc. Agron.. Publicado em: 2014-09
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11. Oxidative stress enhances the expression of sulfur assimilation genes: preliminary insights on the Enterococcus faecalis iron-sulfur cluster machinery regulation
The Firmicutes bacteria participate extensively in virulence and pathological processes. Enterococcus faecalis is a commensal microorganism; however, it is also a pathogenic bacterium mainly associated with nosocomial infections in immunocompromised patients. Iron-sulfur [Fe-S] clusters are inorganic prosthetic groups involved in diverse biological processes
Mem. Inst. Oswaldo Cruz. Publicado em: 06/06/2014
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12. Virulência e formação de biofilme microbiano por Enterococcus faecalis isolados de swabs cloacais de frangos de corte infectados com Eimeria spp
A dinâmica da microbiota no trato gastrointestinal (TG) de animais pode ser afetada por patógenos, tais como Eimeria spp. Os enterococos são bactérias saprófitas que colonizam o TG de mamíferos e aves. A influência sobre a microbiota intestinal está relacionada com a capacidade de adaptação das bactérias em se aderir às células hospedeiras e de
Pesq. Vet. Bras.. Publicado em: 2013-12