Abstract
Genes of human mitochondrial tRNALeu(UUR) (mtRNALeu(UUR)) and its mutant (mtRNALeu(M)) were synthesized and inserted into the plasmid pGEM-9Zf(-) respectively.E.coli JM 109 was transformed by the recombinant plasmids containing the target genes. The mtRNALeu(UUR) and mtRNALeu(M) were expressed up to 19.10% and 17.76% of total small RNA respectively. They were purified to 54% homogeneity by DEAE-sepharose-CL4B column chromatography and finally repurified by 15% PAGE/urea. Their kinetic parameters forE.coli LeuRS were measured. The results showed that the value of kcal/ Km of mtRNALeu(M) was about one fifth of that of mtRNALeu(UUR) and indicated the leucine acceptability of mtRNALeu(M) was much lower than that of mtRNALeu(UUR).
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Han, W., Chen, L., Liu, J. et al. Gene cloning, expression and purification of human mitochondrial tRNALeu(UUR) and its mutant. Sci. China Ser. C.-Life Sci. 44, 113–120 (2001). https://doi.org/10.1007/BF02879315
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DOI: https://doi.org/10.1007/BF02879315