Abstract
The phytohormone methyljasmonate (MJ) on exogenously introducing into the culture of Streptomy- ces canosus 71 var. 6, obtained after γ-irradiation, induced synthesis the protein de novo with the molecular weight of 50 Kda. The action of MJ provokes a gene (genes) expression that resulted in a 65 kDa protein synthesis. This new precursor after intracellular splicing was exported into the culture medium as 50kDa protein. Morphologically the MJ action was discovered in the colonies' growth inhibition. Based on these dates, protein synthesizing de novo, may be classified as a new member of class of the ribosome-inactivated proteins.