イイダコ(Octopus ocellatus)卵由来の赤血球凝集素について

概要

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Hemagglutinating activity was found in extract from Octopus ocellatus eggs. The hemagglutinin was partially purified by ammonium sulfate precipitation and DEAE anion exchange chromatography. DT300, a 300 mM NaCl-eluted fraction from DEAE column, possessed Ca^<2+>-dependent hemagglutinating activity on rabbit erythrocytes at concentrations from 0.47 to 30 μg/mL. Protein bands over 200 kDa were observed in DT300 on sodium dodecyl sulfate polyacrylamide gel electrophoresis. On the other hand, ruthenium red staining gave an obvious single band on a cellulose acetate membrane. The protein and carbohydrate contents of DT300 were 24% and 2%, respectively. DT300-induced hemagglutination was inhibited by fetuin, asialofetuin, heparin, and DNA but not by heparan sulfate and mono- or oligosaccharides tested. This activity was resistant to heat and protease digestion. These results indicate that the active component having C-type lectin-like activity from octopus eggs may not be composed of protein.
東北薬科大学の論文