Protein Tyrosine Phosphatases
Mostrando 1-12 de 196 artigos, teses e dissertações.
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1. Revisiting the roles of VHR/DUSP3 phosphatase in human diseases
Protein tyrosine phosphatases have long been considered key regulators of biological processes and are therefore implicated in the origins of various human diseases. Heterozygosity, mutations, deletions, and the complete loss of some of these enzymes have been reported to cause neurodegenerative diseases, autoimmune syndromes, genetic disorders, metabolic di
Clinics. Publicado em: 06/09/2018
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2. Trypanosoma rangeli protein tyrosine phosphatase is associated with the parasite's flagellum
Protein tyrosine phosphatases (PTPs) play an essential role in the regulation of cell differentiation in pathogenic trypanosomatids. In this study, we describe a PTP expressed by the non-pathogenic protozoan Trypanosoma rangeli (TrPTP2). The gene for this PTP is orthologous to the T. brucei TbPTP1 and Trypanosoma cruzi (TcPTP2) genes. Cloning and expression
Mem. Inst. Oswaldo Cruz. Publicado em: 2012-09
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3. Vias de sobrevivência e morte em queratinócitos submetidos ao estresse oxidativo e choque hiperosmótico / Survival and death signaling pathways in keratinocytes exposed to oxidative stress and hyperosmotic shock
The epidermis is constantly confronted with multiple environmental stressors. Changes in humidity or exposition to UV radiation affect the redox state and osmotic balance, modifying the physiological characteristics of the skin. In response to different stresses, epidermal keratinocytes can activate distinct signaling pathways and the balance between death a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/06/2011
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4. Implementação da análise de acoplamentos estatísticos e sua aplicação à família de proteínas tirosina fosfatases / Implementation of the statistical coupling analysis and its application to the Protein Tyrosine Phosphatases family.
A Análise de Acoplamentos Estatísticos é uma técnica computacional capaz de identificar resíduos importantes para a estrutura e função de proteínas em uma família por meio da quantificação de conservação posicional, correlação entre posições e identificação de grupos de resíduos correlacionados entre si. Neste trabalho, a análise de acop
Publicado em: 2009
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5. Uma perspectiva computacional sobre catálise enzimática
Enzymes are extremely efficient catalysts. Here, part of the mechanisms proposed to explain this catalytic power will be compared to quantitative experimental results and computer simulations. Influence of the enzymatic environment over species along the reaction coordinate will be analysed. Concepts of transition state stabilisation and reactant destabilisa
Quím. Nova. Publicado em: 2008
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6. Partial biochemistry characterization and obtention of low molecular weight acid phosphatase from osteoblasts cultures / Perfil da proteína tirosina fosfatase de baixo peso molecular em células osteoblásticas
Events as phosphorilation and desphosphorilation are experienced in cell growth and differentiation processes. Tyrosine phosphatases proteins are involved in these processes. These enzymes are found in animals, plants and occur in multiple forms, differing in relative molecular weight, substrate specificity and sensitivity to inhibitors. The enzymes that hav
Publicado em: 2008
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7. Natural compounds as modulators of transduction pathways in tumor cells / Copostos naturais como moduladores de vias de transdução de sinal em celulas tumorais
The search for compounds that specifically act on tumors, with low side effects, is a great aim in the studies related to cancer treatment. Many natural compounds isolated from plants have presented promising results as modulating agents of the signal transduction pathways in several types of tumors. Flavonoids, polyphenolic compounds largely distributed in
Publicado em: 2008
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8. Definição de alvos moleculares em diferenciação, morte e resistencia de celulas tumorais / Defenition of molecular targets indifferentiation, death and resisteance in cancer cells
Cancer therapy efficiency, under several aspects, even with the progress of pharmacotechnology, remains as a challenge for the medicine. According to this factor, new agents that act on specific target, present low side-effects and prevent cancer cells escaping from death induction, are extremely desirable. In this work, 3 aspects of antitumoral prop
Publicado em: 2007
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9. Perfil de atividade da proteína tirosina fosfatase de baixa massa molecular relativa e da fosfatase ácida resistente ao tartarato em osteoblastos humanos durante o ciclo e diferenciação celular / Low molecular weight protein tyrosine phosphatase and tartrate resistant acide phosphatase activity in human osteoblasts during cell cycle and differentiation
Low molecular weight protein tyrosine phosphatase (LMW-PTP) and tartrate resistant acid phosphatase (TRAP) activity were determined in hFOB 1.19 human osteoblasts cell line during cell proliferation and differentiation. LMW-PTP and TRAP enzymatic activity were determined at 6, 18, 24, 36, 48 and 72 hours after fetal calf serum stimulation of subconfluent cul
Publicado em: 2005
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10. Reactive oxygen species and angiotensin II signaling in vascular cells: implications in cardiovascular disease
Diseases such as hypertension, atherosclerosis, hyperlipidemia, and diabetes are associated with vascular functional and structural changes including endothelial dysfunction, altered contractility and vascular remodeling. Cellular events underlying these processes involve changes in vascular smooth muscle cell (VSMC) growth, apoptosis/anoikis, cell migration
Brazilian Journal of Medical and Biological Research. Publicado em: 2004-08
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11. On the protein tyrosine phosphatases. Phosphate esters intrinsic reactivity and computer simulation of the mechanisms of enzymatic reaction / Sobre as proteínas tirosina-fosfatases. Reatividade intrínseca de ésteres de fosfato e simulação computacional dos mecanismos de reação enzimática
Proteínas tirosina-fosfatases (PTPs) catalisam a hidrólise de fosfotirosina de outras proteínas e, assim, regulam importantes processos bioquímicos. Dois representantes desta família são as fosfatases de dupla especificidade VHR e CDC25B. A primeira etapa de reação catalisada é um ataque nucleofílico da cadeia lateral de uma cisteína sobre o fósf
Publicado em: 2004
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12. Proteínas tirosina fosfatases: propriedades e funções biológicas
Protein phosphorylation-dephosphorylation catalyzed by the opposing and dynamic action of protein kinases and phosphatases probably, is the most crucial chemical reaction taking place in living organisms. Protein phosphatases are classified according to their substrate specificity and sensitivity to inhibitory or activator agents, into two families of protei
Química Nova. Publicado em: 2003-12