Echinococcus granulosus, E. multilocularis and mammalian liver-type alkaline phosphatases: a comparative study

Philippe Lawton (1) , Marie-Elisabeth Sarciron (1) , Anne-Franqoise Petavy (1)

1 UCBL - Université Claude Bernard Lyon 1

The alkaline phosphatases (EC 3.1.3.1) from Echinococcus granulosus and E. multilocularis (Cestoda) were compared to each other and to a liver-type enzyme. The purified proteins (210 and 220 kDa, respectively) had a tetrameric structure composed of 4, 56/53 kDa subunits. Enzymatic removal of their N-linked sugar moieties abolished the differences in their apparent molecular weight under reducing conditions. After phase separation in Triton X-114, the E. multilocularis enzyme was the most amphiphilic, and treatment with PI-P1C reduced the amount of the parasite alkaline phosphatases that were in a hydrophobic form by about 50%. Both parasite enzymes were highly resistant to heat denaturation and insensitive to the inhibitors L-phenylalanine and L-leucine. In addition, L-homoarginine, levamisole and ZnCi 2 can be used to differentiate the parasite and mammalian liver-type enzymes from each other. The Echinococcus alkaline phosphatases have original biochemical properties when compared to the mammalian liver-type enzyme.

Mots clés: Echinococcus; Characterization; E multilocularis; Biochemical properties; E granulosus; GPI-anchor

Domaines: Parasitologie; Biochimie [q-bio.BM]

Philippe Lawton, Marie-Elisabeth Sarciron, Anne-Franqoise Petavy. Echinococcus granulosus, E. multilocularis and mammalian liver-type alkaline phosphatases: a comparative study. Comparative Biochemistry and Physiology - Part B: Biochemistry and Molecular Biology, 1995, 112 (2), pp.295-301. ⟨10.1016/0305-0491(95)00091-7⟩. ⟨hal-02110731⟩