Peptidyltransferase center of ribosomes

Abstract
The molecular mechanism of action of the alkaloid lycorine has been revised. According to our results, lycorine inhibits the binding of CACCA‐Leu←Ac to the donor site of the peptidyltranferase center of wheat‐germ ribosomes, whereas the transpeptidation reaction in the system with the minimal model donor is not inhibited. The equilibrium constant of CACCA‐Leu←Ac to the donor site of 80 S ribosomes is measured.