Effect of concanavalin A on 5'-nucleotidase activity of rabbit blood platelets.
Ecto-5'-nucleotidase (ecto-5'-NU) of platelets was enhanced by concanavalin A (Con A). This effect of Con A was antagonized by alpha-methyl-D-mannose, a specific antagonist of Con A binding to glycoprotein. Coformycin, an adenosine deaminase inhibitor, did not change the effect of Con A on the ecto-5'-NU. Uptake of adenosine by platelets was not affected by Con A. It was suggested that the ecto-5'-NU of platelet might be a direct and primary site of action of Con A.
D015720:5'-Nucleotidase; D000818:Animals; D001792:Blood Platelets / Q000187:drug effects / Q000201:enzymology*; D003070:Coformycin / Q000494:pharmacology; D003208:Concanavalin A / Q000494:pharmacology*; D066298:In Vitro Techniques; D009708:Nucleotidases / Q000097:blood*; D011817:Rabbits
D003208:Concanavalin A; D003070:Coformycin; D009708:Nucleotidases; D015720:5'-Nucleotidase