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- W2364978735 abstract "Thermophilic esterase (APE1547) from Aeropyrum pernix K1 was subjected to error-prone PCR (epPCR) to enhance activity. For the screening of mutants, an efficient and reliable assay suitable for high throughput screening was developed based on the enzyme thermostability. Two successive rounds of random mutagenesis by epPCR resulted in a four amino acid substitution variant M020 with significantly increased activity (six-fold under the screening condition. Further assay for the purified enzymes showed that the mutant possess 1.5-fold higher specific activity and nearly 4-fold higher expressed level than the wild-type. The mutant has an optimal activity at pH 8.5, corresponding to an alkaline shift of 0.5 pH unit compared to the wild type. The structure analysis suggests that R526S may contribute to the enhanced activity and the shift of pKi." @default.
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- W2364978735 date "2006-04-01" @default.
- W2364978735 modified "2023-09-29" @default.
- W2364978735 title "Directed evolution of Thermophilic esterase from the archaeon Aeropyrum pemix K1" @default.
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