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자료유형
학술저널
저자정보
저널정보
한국미생물생명공학회 Journal of Microbiology and Biotechnology Journal of Microbiology and Biotechnology 제16권 제6호
발행연도
2006.1
수록면
952 - 960 (9page)

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As a unicellular green alga that possesses many of theChlorella offersmany advantages for expresion of heterologous proteins.Since strong and constitutive promoters are necesary forefficient expression in heterologous expression systems, thedevelopment of such promoters for use in the Chlorellasystem was the aim of this study. Proteins encoded by theearly genes of algal viruses are expressed before viral replication,probably by the host transcriptional machinery, and thepromoters of these genes might be useful for heterologousexpresion in Chlorellaof DNA polymerase, ATP-dependent DNA ligase, and chitinasegenes were amplified from eight Korean Chlorela virusisolates by using primer sets designed based on the sequenceof the genome of PBCV-1, the prototype of the Phycodnaviridae.These putative promoter regions were found to containseveral cis-acting elements for transcription factors, includingthe TATA, CAAT, NTBF1, GATA, and CAT boxes.The amplified promoter regions were placed into Chlorella(GFP) reporter gene and the Sh ble gene for phleomycinresistance. C. vulgaris protoplasts were transformed and thenselected with phleomycin. The GFP fluorescence intensitiesof cells transformed with chitinase, DNA polymerase, andDNA ligase gene promoter-GFP fusion constructs were101.5, 100.8, and 95.8%, respectively, of that of CaMV 35S-GFP-transformed Chlorela cells. These results demonstrateChlorela.

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