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GlypicanThe glypican family of Heparan Sulfate proteoglycans are anchored to the cell-surface via a covalent linkage to glycosylphosphatidylinositol (GPI). Six glypican family members have been identified in vertebrates, two in Drosophila and one in C. elegans.[1] Additional recommended knowledgeStructureAll glypicans contain an N-terminal signal peptide and a hydrophobic domain in their C-terminal region, required for attachment of the GPI anchor. The amino acid sequences of the six vertebrate glypican family members vary from being 17% to 63% identical.[2] The location of 14 cysteine amino acids is conserved between the glypicans, suggesting the existence of a highly similar three-dimensional structure. The attachment of Heparan sulfate (HS) glycosaminoglycan chains to glypicans is restricted to the last 50 amino acids in the C-terminus, placing glypican HS chains close to the cell membrane.[3] Genes
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Glypican". A list of authors is available in Wikipedia. |