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Heterologous Expression of Human Ferritin H-chain and L-chain Genes in Saccharomyces cerevisiae  

서향임 (전북대학교 자연대 생물과학부 및 유전공학 연구소)
전은순 (전북대학교 자연대 생물과학부 및 유전공학 연구소)
정윤조 (전북대학교 자연대 생물과학부 및 유전공학 연구소)
김경숙 (전북대학교 자연대 생물과학부 및 유전공학 연구소)
Publication Information
KSBB Journal / v.17, no.2, 2002 , pp. 162-168 More about this Journal
Abstract
Human ferritin H- and L-chain genes(hfH and hfL) were cloned into the yeast shuttle vector YEp352 with various promoters, and the vectors constructed were used to transform Saccharomyces cerevisiae 2805. Three different promoters fused to hfH and hfL were used: galactokinase 1 (GAL1) promoter, glyceraldehyde-3-phosphate dehydrogenase(GPD) promoter and alcohol dehydrogenase 1(ADH1 ) promoter. SDS-polyacrylamide gel electrophoresis and Western blotting analyses displayed expression of the introduced hfH and hfL. In the production of both ferritin H and L subunits GAL1 promoter was more effective than GPD promoter or ADH1 promoter. Ferritin H and L subunits produced in S. cerevisiae were spontaneously assembled into its holoproteins as proven on native polyacrylamide gels. Both recombinant H and L-chain ferritins were catalytically active in forming iron core. When the cells were cultured in the medium containing 10 mM ferric citrate, the cell-associated concentration of iron was 174.9 $\mu\textrm{g}$ Per gram(dry cell weight) for the recombinant yeast YG-L and 148.8 $\mu\textrm{g}$ Per gram(dry cell weight) for the recombinant yeast YG-L but was 49.4 $\mu\textrm{g}$ Per gram(dry cell weight) in the wild type, indicating that the iron contents of yeast is improved by heterologous expression of human ferritin H-chain or L-chain genes.
Keywords
human ferritin H-chain gene; L-chain gene; yeast expression;
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Times Cited By KSCI : 3  (Citation Analysis)
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