Istituto di Biofisica     
Amato C., Vaccari L., Balestreri E., Felicioli R. The role of interlinked positive charges in the polycation inhibition of a leaf proteinase. In: Journal of Plant Physiology, vol. 143 (3) pp. 274 - 278. Elsevier, 1994.
The role of the degree of polymerization and of interlinked positively charged groups in the mechanism of inhibition of a proteinase purified from alfalfa (Medicago sativa)leaf by polycations has been investigated using L-lysine oligomers as model. The monomer, dimer and trimer show competitive inhibition, do not induce conformational change of the enzyme molecule and are not sensitive to ionic strength; the pentamer shows a mixed type of inhibition and induces a conformational change in the enzyme molecule. Both pentamer inhibition and conformational change are ionic strength dependent.
Subject Medicago sativa
Leaf proteinase
L-Lysine oligomers

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