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Search: authors:"Ying‐Jen Leu"

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The structural integrity exerted by N‐terminal pyroglutamate is crucial for the cytotoxicity of frog ribonuclease from Rana pipiens

Onconase, a cytotoxic ribonuclease from Rana pipiens, possesses pyroglutamate (Pyr) at the N‐terminus and has a substrate preference for uridine–guanine (UG). To identify residues responsible for onconase’s cytotoxicity, we cloned the rpr gene from genomic DNA and expressed it in Escherichia coli BL21(DE3). The recombinant onconase with Met at the N‐terminus had reduced...