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Biochim Biophys Acta. 1997 Feb 11;1334(1):1-4.

The presence of GPI-linked protein(s) in an archaeobacterium, Sulfolobus acidocaldarius, closely related to eukaryotes.

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Department of Microbial Chemistry, Faculty of Pharmaceutical Sciences, Nagoya City University, Aichi, Japan.


GPI-anchored proteins are distributed ubiquitously in eukaryotes, but not in procaryotes. By metabolic-labeling of Sulfolobus acidocaldarius cells, 14C-radiolabeled precursors of GPI and caldarchaetidylinositol were incorporated into 120, 143 and 185 kDa proteins. The 185 kDa protein was specifically solubilized by bacterial phosphatidylinositol-specific phospholipase C. Therefore, Sulfolobus proved to contain at least one GPI-anchored proteins.

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