Glypicans.

Research output: Contribution to journalArticle

Abstract

A family of lipid-linked heparan sulfate (HS) proteoglycans, later named glypicans, were identified some 15 years ago. The discoveries that mutations in genes involved in glypican assembly cause developmental defects have brought them into focus. Glypicans have a characteristic pattern of 14 conserved cysteine residues. There are also two–three attachment sites for HS side-chains near the membrane anchor. The HS side-chains consist of a repeating disaccharide back-bone that is regionally and variably modified by epimerization and different types of sulfations, creating a variety of binding sites for polycationic molecules, especially growth factors. Recycling forms of glypican-1 are potential vehicles for transport of cargo into and through cells. The glypican-1 core protein is S-nitrosylated and nitric oxide released from these sites cleave the HS chains at glucosamine units lacking N-substitution. This processing is necessary for polyamine uptake.

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Authors
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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Cell and Molecular Biology

Keywords

  • Heparan sulfate, Nitric oxide, Xyloside, Polyamine
Original languageEnglish
Pages (from-to)125-129
JournalInternational Journal of Biochemistry & Cell Biology
Volume35
Issue number2
Publication statusPublished - 2003
Publication categoryResearch
Peer-reviewedYes