Peroxisomes
Mostrando 1-12 de 310 artigos, teses e dissertações.
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1. Auxinic herbicides, mechanisms of action, and weed resistance: A look into recent plant science advances
Auxin governs dynamic cellular processes involved at several stages of plant growth and development. In this review, we discuss the mechanisms employed by auxin in light of recent scientific advances, with a focus on synthetic auxins as herbicides and synthetic auxin resistance mechanisms. Two auxin receptors were reported. The plasma membrane receptor ABP1
Sci. agric. (Piracicaba, Braz.). Publicado em: 2015-08
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2. Papel dos receptores nucleares ativados por proliferadores de peroxissomos (PPAR) na periodontite induzida em ratos. / Role of peroxisome proliferator activated nuclear receptor (PPAR) in induced periodontitis in rats.
Este estudo investigou o efeito da Roziglitazona (RTZ) sobre a perda óssea alveolar induzida pela periodontite (POAIP). Durante 3 semanas, ratos receberam sal puro de RTZ (i.p.) ou a formulaço comercial AvandiaÒ (v.o.); os grupos controles receberam os repectiovos veículos (DMSO ou CMC). Duas semanas após o inicio do tratamento
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/07/2012
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3. Efeitos de dietas com diferentes conteúdos de ácidos graxos ômega-3 no metabolismo energético - modulação da função dos peroxissomos. / Effects of diets with different omega 3 fatty acids content on energy metabolism - modulation of peroxisomes function.
Ácidos graxos ácidos saturados induzem resistência à insulina, enquanto ácidos graxos poliinsaturados ômega-3 previnem. Camundongos Swiss foram tratados com dieta controle e dietas contendo óleo de peixe a 4% (NFO) e 40% (HFO) ou banha de suínos a 4% (NL) e 40% (HL) por oito semanas. O grupo HFO apresentou menor massa gorda e peso corpóreo em relaç
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/04/2011
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4. Identificação proteômica, expressão heteróloga, citolocalização, estudos de regulação transcricional e traducional da Aconitase Mitocondrial de Paracoccidioides brasiliensis / Identification,characterization and regulation studies of the mitochondrial Aconitase of Paracoccidioides brasiliensis
Paracoccidioides brasiliensis is a thermal-dimorphic fungus, the causative agent of Paracoccidioidomycosis (PCM), an important endemic mycosis in Latin America. A protein species preferentially expressed in yeast cells with a molecular mass of 80kDa and isoeletric point (pI) of 7.79 was isolated from the proteome of P. brasiliensis and characterized as an ac
Publicado em: 2009
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5. Expression profile of oxidative and antioxidative stress enzymes based on ESTs approach of citrus
Plants not only evolve but also reduce oxygen in photosynthesis. An inevitable consequence of this normal process is the production of reactive oxygen species (ROS). Plants are adequately protected by the presence of multiple antioxidative enzymes in the cytosol and also in the different cell organelles such as chloroplasts, mitochondria, and peroxisomes. Tr
Genetics and Molecular Biology. Publicado em: 2007
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6. Ahp1 e Tsa1 de Saccharomyces cerevisiae: regulação gênica, caracterização bioquímica, estrutura e função das duas peroxirredoxinas mais abundantes de leveduras / Saccharomyces cerevisiae Ahp1 and Tsa1: transcriptional regulation, biochemical characterization, structure and function of the two most abundant peroxiredoxins from yeast.
The incomplete reduction of oxygen to water during respiration results in the formation of Reactive Oxygen Species (ROS), oxidizing compounds, which can generate severe cellular oxidative stress. Aerobic cells are equipped with a complex defense system to cope with this condition. Peroxiredoxins make up a family of antioxidant enzymes with the ability to rem
Publicado em: 2007
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7. Contribution to the studyof chemical comunication in Lutzomyia longipalpis AND Lutzomyia cruzi (Diptera: Psychodidae: Phlebotominae) / Contribuição ao estudo da comunicação química em Lutzomyia longipalpis e Lutzomyia cruzi (Diptera: Psychodidae: Phlebotominae)
Ultrastructural cytochemistry of sex pheromone gland cells in abdominal tergites of Lutzomyia cruzi males showed the presence of large amounts of lipid inclusions, peroxisomes, mitochondria and endoplasmic reticulum profiles. In L. longipalpis it was demonstrated that these lipid inclusions appear in the gland cell cytoplasm about 9 hours after adult emergen
Publicado em: 2006
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8. Evidence for the Presence of the Ascorbate-Glutathione Cycle in Mitochondria and Peroxisomes of Pea Leaves.
The presence of the enzymes of the ascorbate-glutathione cycle was investigated in mitochondria and peroxisomes purified from pea (Pisum sativum L.) leaves. All four enzymes, ascorbate peroxidase (APX; EC 1.11.1.11), monodehydroascorbate reductase (EC 1.6.5.4), dehydroascorbate reductase (EC 1.8.5.1), and glutathione reductase (EC 1.6.4.2), were present in m
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9. NADH Induces the Generation of Superoxide Radicals in Leaf Peroxisomes 1
In peroxisomes isolated from pea leaves (Pisum sativum L.) the production of superoxide free radicals (O2−) by xanthine and NADH was investigated. In peroxisomal membranes, 100 micromolar NADH induced the production of O2− radicals. In the soluble fractions of peroxisomes, no generation of O2− radicals was observed by incubation with either NADH or xan
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10. Acyl-CoA oxidase contains two targeting sequences each of which can mediate protein import into peroxisomes.
Acyl-CoA oxidase is a major induced enzyme in peroxisomes of Candida tropicalis grown on fatty acids. The gene, POX4, encoding acyl-CoA oxidase was expressed in vitro, and the resulting polypeptide was imported into purified peroxisomes in a temperature-dependent fashion. Plasmids containing fragments of POX4 were prepared, expressed and the polypeptides tes
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11. Abnormality in catalase import into peroxisomes leads to severe neurological disorder
Peroxisomal disorders are lethal inherited diseases caused by either defects in peroxisome assembly or dysfunction of single or multiple enzymatic function(s). The peroxisomal matrix proteins are targeted to peroxisomes via the interaction of peroxisomal targeting signal sequences 1 and 2 (PTS1 or PTS2) with their respective cytosolic receptors. We have stud
The National Academy of Sciences.
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12. Peroxisomes in Saccharomyces cerevisiae: immunofluorescence analysis and import of catalase A into isolated peroxisomes.
To isolate peroxisomes from Saccharomyces cerevisiae of a quality sufficient for in vitro import studies, we optimized the conditions for cell growth and for cell fractionation. Stability of the isolated peroxisomes was monitored by catalase latency and sedimentability of marker enzymes. It was improved by (i) using cells that were shifted to oleic acid medi