Evaluation of cell recycle on Thermomyces lanuginosus Xylanase A production by Pichia pastoris GS 115.
Appl Biochem Biotechnol
; 129-132: 226-33, 2006.
Article
em En
| MEDLINE
| ID: mdl-16915642
This work aims to evaluate cell recycle of a recombinant strain of Pichia pastoris GS115 on the Xylanase A (XynA) production of Thermomyces lanuginosus IOC-4145 in submerged fermentation. Fed-batch processes were carried out with methanol feeding at each 12 h and recycling cell at 24, 48, and 72 h. Additionally, the influence of the initial cell concentration was investigated. XynA production was not decreased with the recycling time, during four cell recycles, using an initial cell concentration of 2.5 g/L. The maximum activity was 14,050 U/L obtained in 24 h of expression. However, when the initial cell concentration of 0.25 g/L was investigated, the enzymatic activity was reduced by 30 and 75% after the third and fourth cycles, respectively. Finally, it could be concluded that the initial cell concentration influenced the process performance and the interval of cell recycle affected enzymatic production.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Pichia
/
Ascomicetos
/
Engenharia de Proteínas
/
Técnicas de Cultura de Células
/
Reatores Biológicos
/
Endo-1,4-beta-Xilanases
Tipo de estudo:
Evaluation_studies
Idioma:
En
Revista:
Appl Biochem Biotechnol
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Estados Unidos