Proteobacterium
Mostrando 1-12 de 96 artigos, teses e dissertações.
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1. Effect of point mutations on Herbaspirillum seropedicae NifA activity
NifA is the transcriptional activator of the nif genes in Proteobacteria. It is usually regulated by nitrogen and oxygen, allowing biological nitrogen fixation to occur under appropriate conditions. NifA proteins have a typical three-domain structure, including a regulatory N-terminal GAF domain, which is involved in control by fixed nitrogen and not strictl
Braz J Med Biol Res. Publicado em: 10/07/2015
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2. Estudo do sistema BlaR/Blal e de dois operons codificando sistemas de efluxo RND em Caulobacter crescentus. / Study of the BlaR/BlaI system and two operons encoding RND efflux systems from Caulobacter crescentus.
The aim of this work is to characterize three clusters of genes from the alpha proteobacterium Caulobacter crescentus involved in metal and antibiotics response. We analyzed the cluster comprising genes CC1637-CC1640, which contains a BlaR/BlaI signal transduction system, and we performed a comparative analysis with two RND efflux systems consisting on genes
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/04/2012
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3. In vitro and in vivo antitumor activity of crude extracts obtained from Brazilian Chromobacterium sp isolates
Natural products produced by microorganisms have been an important source of new substances and lead compounds for the pharmaceutical industry. Chromobacterium violaceum is a Gram-negative β-proteobacterium, abundant in water and soil in tropical and subtropical regions and it produces violacein, a pigment that has shown great pharmaceutical potential. Crud
Braz J Med Biol Res. Publicado em: 23/10/2012
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4. A prevalent alpha-proteobacterium Paracoccus sp. in a population of the Cayenne ticks (Amblyomma cajennense) from Rio de Janeiro, Brazil
As Rocky Mountain Spotted Fever is the most common tick-borne disease in South America, the presence of Rickettsia sp. in Amblyomma ticks is a possible indication of its endemicity in certain geographic regions. In the present work, bacterial DNA sequences related to Rickettsia amblyommii genes in A. dubitatum ticks, collected in the Brazilian state of Mato
Genet. Mol. Biol.. Publicado em: 16/10/2012
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5. Xenobióticos aumentam a atividade de lacase em γ-Proteobacterium JB alcali-tolerante
Vários corantes têxteis genotóxicos, xenobióticos, substratos (10 mM) e agroquímicos (100 mM/mL) foram testados quanto ao aumento da atividade de lacase em γ-Proteobacterium JB. Os corantes Neutral Red, Indigo Carmine, Naphtol Base Bordears e Sulphast Ruby aumentaram a atividade em 3,7, 2,7, 2,6 e 2,3 vezes, respectivamente. Xenobióticos/substratos co
Brazilian Journal of Microbiology. Publicado em: 2009-03
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6. Expression, purification and DNA-binding activities of two putative ModE proteins of Herbaspirillum seropedicae (Burkholderiales, Oxalobacteraceae)
In prokaryotes molybdenum is taken up by a high-affinity ABC-type transporter system encoded by the modABC genes. The endophyte β-Proteobacterium Herbaspirillum seropedicae has two modABC gene clusters and two genes encoding putative Mo-dependent regulator proteins (ModE1 and ModE2). Analysis of the amino acid sequence of the ModE1 protein of H. seropedicae
Genetics and Molecular Biology. Publicado em: 2008
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7. Degradação do aldicarbe em biorreator anaeróbio horizontal de leito fixo / Aldicarb degradation in a horizontal-flow anaerobic immobilized biomass bioreactor
O objetivo principal deste trabalho foi avaliar o desempenho do biorreator anaeróbio horizontal de leito fixo (RAHLF) na degradação de aldicarbe em condições anaeróbias. Foram avaliados três níveis de oxidação: metanogênico, sulfetogênico e desnitrificante. Inicialmente foi desenvolvido o método de detecção de aldicarbe e metabólitos por meio
Publicado em: 2008
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8. AnÃlise dos padrÃes de utilizaÃÃo de cÃdons sinÃnimos no genoma da bactÃria Chromobacterium violaceum
Biased codon usage may result from various factors. Among prokaryotes, it appears that the influences of natural selection and mutational biases are different if the genome is skewed towards AT or GC. A particular codon subset can often be observed in those genome regions where a maximized translational efficiency is required. Codon usage of a β-proteob
Publicado em: 2006
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9. Evidence that eukaryotic triosephosphate isomerase is of alpha-proteobacterial origin
We have cloned and sequenced genes for triosephosphate isomerase (TPI) from the gamma-proteobacterium Francisella tularensis, the green non-sulfur bacterium Chloroflexus aurantiacus, and the alpha-proteobacterium Rhizobium etli and used these in phylogenetic analysis with TPI sequences from other members of the Bacteria, Archaea, and Eukarya. These analyses
The National Academy of Sciences of the USA.
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10. Proteorhodopsin genes are distributed among divergent marine bacterial taxa
Proteorhodopsin (PR) is a retinal-binding bacterial integral membrane protein that functions as a light-driven proton pump. The gene encoding this photoprotein was originally discovered on a large genome fragment derived from an uncultured marine γ-proteobacterium of the SAR86 group. Subsequently, many variants of the PR gene have been detected in marine pl
National Academy of Sciences.
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11. Phylogenetic Analysis of Culturable Dimethyl Sulfide-Producing Bacteria from a Spartina-Dominated Salt Marsh and Estuarine Water
Dimethylsulfoniopropionate (DMSP), an abundant osmoprotectant found in marine algae and salt marsh cordgrass, can be metabolized to dimethyl sulfide (DMS) and acrylate by microbes having the enzyme DMSP lyase. A suite of DMS-producing bacteria isolated from a salt marsh and adjacent estuarine water on DMSP agar plates differed markedly from the pelagic strai
American Society for Microbiology.
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12. Biodegradation of cis-Dichloroethene as the Sole Carbon Source by a β-Proteobacterium
An aerobic bacterium capable of growth on cis-dichloroethene (cDCE) as a sole carbon and energy source was isolated by enrichment culture. The 16S ribosomal DNA sequence of the isolate (strain JS666) had 97.9% identity to the sequence from Polaromonas vacuolata, indicating that the isolate was a β-proteobacterium. At 20°C, strain JS666 grew on cDCE with a
American Society for Microbiology.