Trehalase
Mostrando 1-12 de 71 artigos, teses e dissertações.
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1. Expressão de genes de resposta a estresses ambientais em mutantes defectivos de milho e Arabidopsis
Reverse genetics and gene expression analysis has been the main approach adopted in order to carry out the functional characterization of genes. Results from such studies have typically demonstrated that same gene can be involved in different cell functions. In this context, analysis of trehalose metabolism in plants has revealed that this pathway plays an i
Publicado em: 2008
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2. Expressão de genes de resposta a estresses ambientais em mutantes defectivos de milho e Arabidopsis
A associação da genética reversa com a análise de expressão gênica têm sido a principal abordagem para caracterização funcional de genes. Tais estudos têm demonstrado que um mesmo gene pode participar em diferentes funções na célula. Nesse contexto, a análise do metabolismo de trealose em plantas tem revelado que esta via possui um importante p
Publicado em: 2008
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3. Termorregulação colonial e energética individual em abelhas sem ferrão Melipona quadrifasciata Lepeletier (Hymenoptera, Apidae, Meliponini) / Colonial thermoregulation and energetics in stingless bees Melipona quadrifasciata Lepeletier (Hymenoptera, Apidae, Meliponini).
In eusocial insects, such as stingless bees, the control of nest conditions and maintenance of the colonial microclimate are important to brood incubation, development of eggs, larvae and pupae, and survival of the colony. One of the main thermoregulatory mechanisms to control nest temperature is the microhabitat selection to build the nest, such as tree hol
Publicado em: 2008
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4. Bicho-mineiro do cafeeiro: anÃlise da digestÃo e inibiÃÃo de tripsina por extratos de folhas de mamona. / Coffee leaf miner: Digestion and trypsin inhibition using castor beam leaves extracts.
Coffee is a crop of great social and economic importance to Brazil and its production is affected by a number of pests and diseases. One of those pests is the coffee leaf miner, Leucoptera coffeella (GuÃrin-MÃneville, 1842) (Lepidoptera: Lyonetiidae) which can cause great losses in production. The forms of controlling the coffee leaf miner known and utiliz
Publicado em: 2007
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5. Digestive and energy metabolism enzymes from pyrethroid resistant and susceptible populations of maize weevil / Enzimas de metabolismo energético e digestivo em populações de caruncho-do-milho resistentes e susceptível a piretróides
Studies on Sitophilus zeamais populations of distinct insecticide susceptibility suggest higher efficiency in mobilizing energy in some resistant populations, making possible the production of their defense apparatus against insecticide, without impairing their reproductive performance. This efficiency can be the result of a high carbohydrates and proteins a
Publicado em: 2006
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6. Expressão da trealase intestinal de Spodoptera frugiperda e efeito de beta-glicosídeos naturais em trealases de insetos / Molecular cloning, sequencing and expression of cDNA encoding intestinal trehalase of Spodoptera frugiperda
A trealase solúvel foi purificada a partir do intestino de S. frugiperda. Os pKas dos grupos catalíticos determinados por inativação química são similares aos pKas determinados por analise cinética, indicando que a enzima tem um grupo carboxila que atua como um nucleófilo e um grupo guanidina que atua como doador de prótons. Dietil pirocarbonato nã
Publicado em: 2006
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7. Shared control of maltose and trehalose utilization in Candida utilis
Trehalose biosynthesis and its hydrolysis have been extensively studied in yeast, but few reports have addressed the catabolism of exogenously supplied trehalose. Here we report the catabolism of exogenous trehalose by Candida utilis. In contrast to the biphasic growth in glucose, the growth of C. utilis in a mineral medium with trehalose as the sole carbon
Brazilian Journal of Medical and Biological Research. Publicado em: 2003-07
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8. Papel da trealose no metabolismo de larvas de Pyrearinus termitilluminas (coleoptera: elateridae) sob estresse hídrico / The role o trehalose in the metabolism of Pyresrinus termitilluminas larvae (coleoptera: elateridae) under hidric stress
The life cycle of Pyrearinus termitilluminans (Coleoptera: Elateridae) takes place totally into the so-called luminous termite mounds located in Central Brazil, which are clearly observed during the rainy season. Light emission by the elaterid larvae acts like a trap attracting flying insects. The bioluminescence disappears in the dry months together with th
Publicado em: 2003
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9. Evidence for a modulation of neutral trehalase activity by Ca2+ and cAMP signaling pathways in Saccharomyces cerevisiae
Saccharomyces cerevisiae neutral trehalase (encoded by NTH1) is regulated by cAMP-dependent protein kinase (PKA) and by an endogenous modulator protein. A yeast strain with knockouts of CMK1 and CMK2 genes (cmk1cmk2) and its isogenic control (CMK1CMK2) were used to investigate the role of CaM kinase II in the in vitro activation of neutral trehalase during g
Brazilian Journal of Medical and Biological Research. Publicado em: 2002-01
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10. Expressão de homólogos de uma proteína de choque térmico e da enzima trehalose-6-fosfato sintase durante déficit hídrico em algodão
Tolerância à seca em plantas não é uma característica simples, mas sim um complexo de mecanismos trabalhando em combinação para evitar ou tolerar períodos de déficit hídrico. Genótipos que diferem em tolerância à déficits hídricos apresentam diferenças qualitativas e quantitativas de expressão gênica. Quatro genótipos de algodão (Gossypiu
Brazilian Journal of Plant Physiology. Publicado em: 2002-01
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11. Evidence for Contribution of Neutral Trehalase in Barotolerance of Saccharomyces cerevisiae
In yeast, trehalose accumulation and its hydrolysis, which is catalyzed by neutral trehalase, are believed to be important for thermotolerance. We have shown that trehalose is one of the important factors for barotolerance (resistance to hydrostatic pressure); however, nothing is known about the role of neutral trehalase in barotolerance. To estimate the con
American Society for Microbiology.
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12. Neurospora Trehalase and Its Structural Gene
We have isolated Neurospora trehalaseless mutants and mapped the trehalase structural gene to linkage group I. The structural gene mutations not only affect thermostability and other characteristics of the enzyme but also affect the production of an inhibitor of the wild-type trehalase. The inhibitor appears to be the mutant trehalase. We suggest that the mu