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| Zepeda,Andrea B.; Figueroa,Carolina A.; Abdalla,Dulcineia S.P.; Maranhão,Andrea Q.; Ulloa,Patricio H.; Pessoa Jr.,Adalberto; Farías,Jorge G.. |
| Pichia pastoris is a methylotrophic yeast used as an efficient expression system for heterologous protein production as compared to other expression systems. Considering that every cell must respond to environmental changes to survive and differentiate, determination of endogenous protein related to heat stress responses and hypoxia, it would necessary to establish the temperature and methanol concentration conditions for optimal growth. The aim of this study is characterize the culture conditions through the putative biomarkers in different conditions of temperature and methanol concentration. Three yeast cultures were performed: 3X = 3% methanol -10 °C, 4X = 3% methanol -30 °C, and 5X = 1% methanol -10 °C. The expression level of HIF-1α, HSF-1, HSP-70... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Recombinant yeast; Heat stress protein; Hypoxia; Chaperone. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000200015 |
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| Zepeda,Andrea B.; Figueroa,Carolina A.; Abdalla,Dulcineia S.P.; Maranhão,Andrea Q.; Ulloa,Patricio H.; Pessoa Jr,Adalberto; Farías,Jorge G.. |
| Pichia pastoris is methylotrophic yeast used as an efficient expression system for heterologous protein production. In order to evaluate the effects of temperature (10 and 30 °C) and methanol (1 and 3% (v/v)) on genetically-modified Pichia pastoris, different biomarkers were evaluated: Heat stress (HSF-1 and Hsp70), oxidative stress (OGG1 and TBARS) and antioxidant (GLR). Three yeast cultures were performed: 3X = 3% methanol-10 °C, 4X = 3% methanol-30 °C, and 5X = 1% methanol-10°C. The expression level of HIF-1α, HSF-1, HSP-70 and HSP-90 biomarkers were measured by Western blot and in situ detection was performed by immunocytochemistry. Ours results show that at 3% methanol -30 °C there is an increase of mitochondrial OGG1 (mtOGG1), Glutathione Reductase... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oxidative stress; Recombinant yeast; Heat stress protein; DNA damage. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000200014 |
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| Arraes,Fabricio B.M.; Carvalho,Maria José A. de; Maranhão,Andrea Q.; Brígido,Marcelo M.; Pedrosa,Fábio O.; Felipe,Maria Sueli S.. |
| The annotation and comparative analyses of the genomes of Mycoplasma synoviae and Mycoplasma hyopneumonie, as well as of other Mollicutes (a group of bacteria devoid of a rigid cell wall), has set the grounds for a global understanding of their metabolism and infection mechanisms. According to the annotation data, M. synoviae and M. hyopneumoniae are able to perform glycolytic metabolism, but do not possess the enzymatic machinery for citrate and glyoxylate cycles, gluconeogenesis and the pentose phosphate pathway. Both can synthesize ATP by lactic fermentation, but only M. synoviae can convert acetaldehyde to acetate. Also, our genome analysis revealed that M. synoviae and M. hyopneumoniae are not expected to synthesize polysaccharides, but they can take... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mollicutes; Mycoplasma; Metabolism; Comparative genomics. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000200004 |
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