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Acta Biochim Pol. 2000;47(3):781-9.

Protein C-mannosylation: facts and questions.

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Friedrich Miescher-Institut, Basel, Switzerland.


Among the posttranslational modifications of proteins, glycosylation is probably the most abundant one. Two main types of protein glycosylation have been known for several years, namely N-glycosylation and O-glycosylation. Their biochemical properties, structure and biosynthesis, have been described extensively. Their biological functions are also known for a number of proteins, although in many cases the function remains speculative despite continuous efforts. A few years ago, a new type of protein glycosylation was found, which is different from the above-mentioned ones. It was called C-glycosylation, since the sugar is linked to the protein through a carbon-carbon bond. This article reviews the biochemistry of C-glycosylation, the biosynthetic pathway and structural requirements. Possible biological functions of this modification are also discussed.

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