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Analysis of the Structure of Heparin and Heparan Sulfate by High-Resolution Separation of Oligosaccharides

  • Robert J. Linhardt
  • Toshihiko Toida
  • April E. Smith
  • Ronald E. Hileman
Part of the BioMethods book series (BIOMETHODS)

Abstract

Heparin and heparan sulfate are mixtures of highly sulfated linear polysaccharides having a molecular weight (MW) ranging from 5000 to 40,000 with an MW avg of 10,000 to 25,000 (1). They are members of a family of molecules called glycosaminoglycans (GAGs). Both heparin and heparan sulfate are biosynthesized as a repeating →4)α-D-GlcNpAc(1→4)-β-D-GlcAp(1→ disaccharide sequence that undergoes partial N-deacetylation followed by N-sulfation of the newly exposed amino groups, partial C-5 epimerization of D-GlcAp to L-IdoAp and O-sulfation. A single disaccharide sequence, [→4)α-D-GlcNpS6S-(1→4)-a-L-IdoAp2S (1→], accounts for 80 to 90% of the heparin polymer. Minor sequences contain (β-D-GlcAp residues, reduced sulfation as well as N-acetylation. Heparan sulfate is structurally similar to heparin but has substantially lower sulfation. Heparan sulfate consists primarily of unsulfated disaccharide [→4)α-D-GlcNpS-(1→4)-β-D-GlcAp(1 →] and monosulfated disaccharides [→4)α-D-GlcNpS-(1→4)-β-D-GlcAp(1→] and [→4)α-D-GlcNpAc6S(1→4)-β-D-GlcAp(1 →].

Keywords

Heparan Sulfate Reverse Polarity Alcian Blue Normal Polarity Heparin Lyase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Birkhäuser Verlag Basel 1997

Authors and Affiliations

  • Robert J. Linhardt
  • Toshihiko Toida
  • April E. Smith
  • Ronald E. Hileman

There are no affiliations available

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