Amino acids conserved at the C-terminal half of the ribonuclease T2 family contribute to protein stability of the enzymes.

Abstract excerpt

The ribonuclease MC1 (RNase MC1) from the seeds of the bitter gourd belongs to the RNase T2 family. We evaluated the contribution of 11 amino acids conserved in the RNase T2 family to protein folding of RNase MC1. Thermal unfolding experiments showed that substitution of Tyr(101), Phe(102), Ala(105), and Phe(190) resulted in a significant decrease in themostability; the T(m) values were 47-58 degrees C compared...

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