Search results for "Fetuin"
showing 3 items of 43 documents
Posttranslational Processing of Human α2-HS Glycoprotein (Human Fetuin)
2008
α2-HS glycoprotein (α2-HS) is a major protein occuring in human blood and calciferous tissues. Due to extensive sequence identity, α2-HS has been grouped with the fetuins, a family of proteins that occur in fetal plasma in high concentrations. Native α2-HS undergoes a series of posttranslational modifications including proteolytic processing, multiple N-glycosylations and O-glycosylations, and sulfation of the carbohydrate side chains. Various two-chain forms of α2-HS have been prepared from human plasma, however, the single-chain precursor has not yet been isolated. Here, we have studied the biosynthesis of α2-HS by a human hepatoma cell line, HepG2. We demonstrate that a single-chain form…