Article
The structural integrity exerted by N-terminal pyroglutamate is crucial for the cytotoxicity of frog ribonuclease from Rana pipiens.
Nucleic acids research - 15 Sept 2003
Liao You-Di, Wang Sui-Chi, Leu Ying-Jen, Wang Chiu-Feng, Chang Shu-Ting, Hong Yu-Ting, Pan Yun-Ru, Chen Chinpan
Abstract excerpt
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 thermostability, catalytic activity and...
Read the complete abstract on PubMedTopics
Share this publication in a Topic to start or enrich a Post.
