Interaction of hepatocyte growth factor with heparan sulfate. Elucidation of the major heparan sulfate structural determinants.
Affiliation
Cancer Research Campaign, Christie Hospital, Manchester, United Kingdom.Issue Date
1994-04-15
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We have demonstrated by affinity chromatography that hepatocyte growth factor (HGF) binds strongly to heparan sulfate (HS). This substantiates previous suggestions that cell-surface heparan sulfate proteoglycans constitute the so-called low affinity cellular binding sites for HGF. Using a recombinant human HGF affinity column, we have analyzed the effects of various specific chemical and enzymatic modifications/depolymerizations of HS on its affinity in order to elucidate the polysaccharide structural determinants. Interaction is shown to be only slightly affected by digestion with heparinase I or III or by replacement of N-sulfates with N-acetyl groups. This suggests a specific role for sulfated domains containing nonsulfated IdceA residues, with only a small contribution from N-sulfates and IdceA(2-OSO3) residues. In addition, disaccharide analyses of various HGF-binding oligosaccharides indicate that affinity is more closely associated with 6-O-sulfation of GlcNSO3 residues than with sulfation at any other position. Although interaction can be demonstrated with heparinase III-resistant oligosaccharides as small as hexasaccharides, the highest affinity was found with oligosaccharides containing a minimum of 10-12 monosaccharides. The structural specificity of the HGF-HS interaction is thus shown to be radically different from that previously described for the basic fibroblast growth factor-HS interaction.Citation
Interaction of hepatocyte growth factor with heparan sulfate. Elucidation of the major heparan sulfate structural determinants. 1994, 269 (15):11216-23 J. Biol. Chem.Journal
The Journal of Biological ChemistryPubMed ID
8157651Type
ArticleLanguage
enISSN
0021-9258Collections
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