Pseudocolloid formation of Uranium with soluble surface glycoprotein of Paramecium

ゾウリムシ由来の水溶性表面糖タンパク質とウランの擬似コロイド形成

香西 直文   ; 坂本 文徳  ; 田中 万也  ; 佐藤 隆博; 神谷 富裕

Kozai, Naofumi; Sakamoto, Fuminori; Tanaka, Kazuya; Sato, Takahiro; Kamiya, Tomihiro

生きたゾウリムシをU(VI)の水溶液に入れたあとの細胞にはUはほとんど検出されず、予め死滅させた細胞には明確に検出された。液相のUは巨大な水溶性糖タンパク質と結合し擬似コロイドを形成していた。ゾウリムシ細胞表面の水溶性糖タンパク質と本実験結果との関係を議論する。

When living Paramecium cells were exposed to a U(VI) aqueous solution, U was hardly detected in the cells, while U was clearly detected in the Paramecium cells that were pre-killed with a fixative before exposure to the U aqueous solution. The U in the liquid phase after the experiment was found to bound to a large soluble glycoprotein to form pseudocolloid. We discuss the relation between these results and the soluble glycoprotein covering the cell surface of Paramecium.