Double-stranded oligomeric nucleotide encoding PEP-1 peptides was synthesized, pro- karyotic expression pET15b-pep-1-p27mt recombinant constructed, E. coli BL21 (DE3)pLysS trans- formed and induced with IPTG to highly...Double-stranded oligomeric nucleotide encoding PEP-1 peptides was synthesized, pro- karyotic expression pET15b-pep-1-p27mt recombinant constructed, E. coli BL21 (DE3)pLysS trans- formed and induced with IPTG to highly express fusion protein PEP-1-P27mt. Fusion protein with an N-terminal His-tag could be purified by Ni2+-resin affinity chromatography and identified by SDS-PAGE and Western blotting. Cultured EC9706 cells treated with PEP-1-P27mt revealed that PEP-1-P27mt was transduced into cells after 15 min and reached maximal intracellular concentra- tions in 2 h. PEP-1-P27mt of 1 μmol/L final concentration could most strongly suppress the growth. It was suggested that PEP-1 can carry P27mt across membrane, which provides a new biological pro- tocol for using cyclin dependent kinase inhibitors p27mt in suppressing the growth of tumor cells.展开更多
基金a grant from Department of Education of Hubei Province, China (No. Q200524001).
文摘Double-stranded oligomeric nucleotide encoding PEP-1 peptides was synthesized, pro- karyotic expression pET15b-pep-1-p27mt recombinant constructed, E. coli BL21 (DE3)pLysS trans- formed and induced with IPTG to highly express fusion protein PEP-1-P27mt. Fusion protein with an N-terminal His-tag could be purified by Ni2+-resin affinity chromatography and identified by SDS-PAGE and Western blotting. Cultured EC9706 cells treated with PEP-1-P27mt revealed that PEP-1-P27mt was transduced into cells after 15 min and reached maximal intracellular concentra- tions in 2 h. PEP-1-P27mt of 1 μmol/L final concentration could most strongly suppress the growth. It was suggested that PEP-1 can carry P27mt across membrane, which provides a new biological pro- tocol for using cyclin dependent kinase inhibitors p27mt in suppressing the growth of tumor cells.
