Cloning and expression of pokeweed antiviral protein-II gene from the summer leaves of Phytolacca amercana / 生物工程学报
Chinese Journal of Biotechnology
;
(12): 592-597, 2006.
Artigo
em Chinês
| WPRIM
| ID: wpr-286244
ABSTRACT
The cDNA sequence encoding pokeweed antiviral protein-II was cloned from the fresh summer leaves of phytolacca amercana by RT-PCR. The recombinant PAP-II was subcloned into the expression vector pET-28a(+) and expressed in E. coli BL21 after IPTG induction. SDS-PAGE analysis showed that the expressed PAP-II existed in the form of inclusion bodies. The purified fusion protein was obtained after a series of steps including cell break, inclusion body solubilization, protein refolding and purification through BBST NTA resin column. The non-radioactive ELISA-based HIV-1 integrase assay showed that the recombinant pokeweed antiviral protein-II and RTA were able to inhibit HIV-1 integrase to some extent (IC50 = 303 microg/mL, 220 microg/mL respectively). MTT assay showed that cytotoxicity of pokeweed antiviral protein II for HEP-G2 cells and Hela cells was in a dose-dependent manner with IC50 s of 93 microg/mL and 102 microg/mL, respectively. The results suggested that pokeweed antiviral protein-II is a potent anti-tumor candidate. The finding of integrase inhibitory activity and the discovery of cytotoxicity provide more insights into the anti-HIV and the anti-tumor activities of PAP-II.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Farmacologia
/
Plasmídeos
/
Proteínas Recombinantes
/
Células HeLa
/
Clonagem Molecular
/
Folhas de Planta
/
Integrase de HIV
/
Phytolacca americana
/
Proteínas Inativadoras de Ribossomos Tipo 1
/
Genética
Limite:
Humanos
Idioma:
Chinês
Revista:
Chinese Journal of Biotechnology
Ano de publicação:
2006
Tipo de documento:
Artigo
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