Expression of the soluble human Fas ligand in Dictyostelium discoideum / 生物工程学报
Chinese Journal of Biotechnology
;
(12): 380-384, 2005.
Artículo
en Chino
| WPRIM
| ID: wpr-305265
ABSTRACT
An expression system is described for high-yield production of recombinant soluble human FasL (shFasL) in Dictyostelium discoideum cells. DNA encoding amino acids 141 - 281 of hFasL was PCR amplified from cDNA derived from activated human neutrophils. The resulting product was fused with a DNA fragment encoding hCG-beta signal peptide and cloned in the expression vector pMB12neo. Dictyostelium strain AX3 was transfected with this plasmid, yielding a recombinant strain called AX3-pCESFL95-H3. In order to improve the shFasL expression level, pMB12neo was optimized by replacing its transcriptional terminator/ polyadenylation segment of the 2H3 gene with an actin8 terminator/polyadenylation segment, yielding derived expression vector pMB74. The recombinant Dictyostelium strain called AX3-pLu8 was generated with this new plasmid. When the recombinant cells were cultivated in a complex HL-5C medium, a cell density of (1.5 - 2) x 10(7)/mL was reached, and the shFasL level expressed by strains AX3-pCESFL95-H3 and AX3-pLu8 was 23.5 microg/L and 206 microg/L, respectively. By using a newly developed synthetic medium called SIH as culture medium, higher cell density of (4 - 5) x 10(7)/mL was achieved. Correspondently, 111 microg/L and 420 microg/L shFasL were secreted by recombinant strains AX3-pCESFL95-H3 and AX3-pLu8, respectively.
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Proteínas Recombinantes
/
Gonadotropina Coriónica Humana de Subunidad beta
/
Medios de Cultivo
/
Dictyostelium
/
Proteína Ligando Fas
/
Genética
/
Metabolismo
/
Neutrófilos
Límite:
Animales
/
Humanos
Idioma:
Chino
Revista:
Chinese Journal of Biotechnology
Año:
2005
Tipo del documento:
Artículo
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