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- W2386594959 abstract "The strategies for improving the expression efficiency of foreign genes in cyanobacterial hosts are,so far,focusing on modifying donor DNA elements.This work described here was an attempt to physiologically change host systems and see how they affected the expression efficiency of foreign genes in cyanobacteria.Our previous work presented that filamentous cyanobacterium Anabaena sp.PCC7120 cells induced by high temperature and red light can generate short filaments (SHT and SRL,respectively) with photosynthetic activities that has the ability to normally differentiate into vegetable filaments.We transferred here a foreign gene (human tumor necrosis factorα,hTNFα) into these short filaments.A shuttle expression vector pKTTNF harboring human TNFα gene was constructed and transconjugated into the cells of SHT,SRL and the normal vegetative filaments (control) by triparental conjugal mating,respectively.The data showed that the transconjugative efficiencies of pKTTNFs in the SHT and SRL were 500%-600% of those in the control cells.The Southern blotting confirmed TNFα gene was replicated in transconjugative cells of SHT,SRT and control.The Western blotting suggested that pKTTNFs were expressed in these cells.The radioimmunoassay (RIA) showed expression efficiency of pKTTNFs in the SHT and SRL cells were about 400%-500% of those in the control cells.This might provide a novel potential avenue to improve the expression efficiency of foreign genes in filamentous cynobacteria.In addition,we also analyzed the effect of genetic code bias of human TNFα gene on its expression in Anabaena sp.PCC7120." @default.
- W2386594959 created "2016-06-24" @default.
- W2386594959 creator A5008880978 @default.
- W2386594959 date "2003-01-01" @default.
- W2386594959 modified "2023-09-25" @default.
- W2386594959 title "Elevating Expression of Human Tumor Necrosis Factor Alpha Gene in Anabaena sp. PCC7120 Short Filaments Induced by High Temperature and Red Light" @default.
- W2386594959 hasPublicationYear "2003" @default.
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