Production of SAM by recombinant Pichia pastoris / 生物工程学报
Chinese Journal of Biotechnology
;
(12): 295-299, 2002.
Artigo
em Chinês
| WPRIM
| ID: wpr-231331
ABSTRACT
To utilize Pichia pastoris to produce S-adenosyl-L-methionine (SAM), an intracellular expression vector harboring S. cerevisiae SAM2 was transformed into GS115. A recombinant strain having 2 copies of expression cassette was obtained through G418 resistance screening. This strain had higher SAM synthetase activity and higher SAM production capacity than the original strain, when cultured in medium containing methanol and methionine. The carbon source and nitrogen source of medium was optimized. The results showed SAM production by this strain was closely related to carbon metabolism. With supplementation of 0.2% glycerol every day from the beginning of 3rd day, this strain produced 1.58 g/L SAM when cultured in a medium containing 0.75% L-methionine and optimized carbon and nitrogen source after 6 days.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Pichia
/
S-Adenosilmetionina
/
Proteínas Recombinantes
/
Genética
/
Metabolismo
/
Metionina Adenosiltransferase
Idioma:
Chinês
Revista:
Chinese Journal of Biotechnology
Ano de publicação:
2002
Tipo de documento:
Artigo
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