Psaa
Mostrando 1-12 de 58 artigos, teses e dissertações.
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1. Conformational analysis of Pneumococcal Surface Antigen A (PsaA) upon zinc binding by fluorescence spectroscopy
ABSTRACT PsaA (pneumococcal surface antigen A) is a S. pneumoniae virulence factor that belongs to the metal transport system. The Manganese PsaA binding has been associated with oxidative stress resistance becoming a pivotal element in the bacteria virulence. It has been shown that Zinc inhibits the Manganese acquisition and promotes bacteria toxicity. We h
An. Acad. Bras. Ciênc.. Publicado em: 25/06/2018
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2. The virulence of Streptococcus pneumoniae partially depends on dprA
Abstract Streptococcus pneumoniae is one of the most frequent opportunistic pathogens worldwide. DNA processing protein A (DprA) is an important factor involved in bacterial uptake and DNA integration into bacterial genome, but its role in S. pneumoniae virulence remains unclear. The aim of this study was to characterize the effects of the pneumococcal dprA
Braz. J. Microbiol.. Publicado em: 2017-06
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3. Proton conductive membranes based on poly (styrene-co-allyl alcohol) semi-IPN
The optimization of fuel cell materials, particularly polymer membranes, for PEMFC has driven the development of methods and alternatives to achieve systems with more adequate properties to this application. The sulfonation of poly (styrene-co-allyl alcohol) (PSAA), using sulfonating agent:styrene ratios of 2:1, 1:1, 1:2, 1:4, 1:6, 1:8 and 1:10, was previous
Polímeros. Publicado em: 10/06/2014
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4. Evaluation of the posterior superior alveolar artery and the maxillary sinus with CBCT
Assessment of the maxillary sinus anatomy before sinus augmentation is important for avoiding surgical complications, because of the close anatomical relationship between the posterior maxillary teeth and the maxillary sinus. The posterior superior alveolar artery (PSAA) is the branch of the maxillary artery that supplies the lateral sinus wall and overlying
Braz. oral res.. Publicado em: 2013-09
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5. Cloning, expression and purification of proteins of surface, PsaA and fragments of PspA from Streptococcus pneumoniae / Clonagem, expressão e purificação das proteínas de superfície, PsaA e fragmentos de PspA de Streptococcus pneumoniae
Streptococcus pneumoniae is the main causative agent of bacterial pneumonia. The current vaccines available contain capsular polysaccharide conjugated or not with carrier proteins. However these are either too expensive or do not protect the high-risk groups. Surface proteins of S. pneumoniae, such as PsaA and PspA, are considered strong vaccine candidates.
Publicado em: 2005
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6. Estudo do efeito adjuvante de CTB em fusões com as proteínas pneumocócicas PsaA e PspA no desenvolvimento de vacinas protéicas contra Streptococcus pneumoniae / Study of the adjuvant effect of CTB in fusions with PsaA and PspA pneumococcal proteins in the development of proten-based vaccines against Streptococcus pneumoniae
A colonização da mucosa respiratória é a primeira etapa na patogênese de Streptococcus pneumoniae, bactéria causadora de pneumonia, meningite, e otite média, responsável por mais de um milhão de mortes por ano no mundo. As proteínas de superfície PsaA e PspA têm sido investigadas como candidatos vacinais para estas doenças. CTB é a porção nã
Publicado em: 2005
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7. Caracterização de latex poliestirenicos por centrifugação em gradiente de densidade
This thesis contains five parts: Synthesis of polystyrene and poly[styrene-co-(acrylic acid)] latices, containing the basic information on emulsion polymerization together with the procedures used in this work, in the synthesis of PS and PSAA latices. Characterization of the latices of polystyrene and poly[styrene-co-(acrylic acid)], where the products of sy
Publicado em: 1994
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8. Sequence heterogeneity of PsaA, a 37-kilodalton putative adhesin essential for virulence of Streptococcus pneumoniae.
psaA encodes a 37-kDa putative pneumococcal surface adhesin. Although its complete nucleotide sequence has been determined, its contribution to the pathogenicity of Streptococcus pneumoniae has not previously been assessed. In this study, we used a PCR-amplified internal fragment of the psaA gene from S. pneumoniae type 2 strain D39 cloned in pVA891, to dire
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9. Diagnosis of Pneumococcal Pneumonia by psaA PCR Analysis of Lung Aspirates from Adult Patients in Kenya
psaA is the gene encoding pneumococcal surface adhesin A (PsaA), a 37-kDa protein expressed on the surface of Streptococcus pneumoniae. PCR primers for psaA have been shown to amplify the target DNA sequence in all 90 serotypes of S. pneumoniae and in none of 67 heterologous pathogens and colonizing bacteria of the upper respiratory tract. Pathogenic bacteri
American Society for Microbiology.
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10. Virulence of Streptococcus pneumoniae: PsaA Mutants Are Hypersensitive to Oxidative Stress
psaA encodes a 37-kDa pneumococcal lipoprotein which is part of an ABC Mn(II) transport complex. Streptococcus pneumoniae D39 psaA mutants have previously been shown to be significantly less virulent than wild-type D39, but the mechanism underlying the attenuation has not been resolved. In this study, we have shown that psaA and psaD mutants are highly sensi
American Society for Microbiology.
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11. Identification of the psaA Gene, Coding for Pneumococcal Surface Adhesin A, in Viridans Group Streptococci other than Streptococcus pneumoniae
The gene encoding the pneumococcal surface adhesin A (PsaA) protein has been identified in three different viridans group streptococcal species. Comparative studies of the psaA gene identified in different pneumococcal isolates by sequencing PCR products showed a high degree of conservation among these strains. PsaA is encoded by an open reading frame of 930
American Society for Microbiology.
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12. Biogenesis of PSI involves a cascade of translational autoregulation in the chloroplast of Chlamydomonas
Photosystem I comprises 13 subunits in Chlamydomonas reinhardtii, four of which—the major reaction center I subunits PsaA and PsaB, PsaC and PsaJ—are chloroplast genome-encoded. We demonstrate that PSI biogenesis involves an assembly-governed regulation of synthesis of the major chloroplast-encoded subunits where the presence of PsaB is required to obser
Nature Publishing Group.