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dc.contributor.authorPeters-Libeu, C.
dc.contributor.authorLund-Katz, S.
dc.contributor.authorPhillips, M.
dc.contributor.authorWehrli, S.
dc.contributor.authorHernaiz, M.J.
dc.contributor.authorCapila, I.
dc.contributor.authorLinhardt, Robert J.
dc.contributor.authorRaffai, R.
dc.contributor.authorNewhouse, Y.M.
dc.contributor.authorZhou, M.F.
dc.contributor.authorWeisgraber, K.H.
dc.identifier.citationNew Insights into the Heparan Sulfate Proteoglycan binding Activity of Apolipoprotein E4, C. Peters-Libeu, S. Lund-Katz, M. Phillips, S. Wehrli, M. J. Hernaiz, I. Capila, R.J. Linhardt, R. Raffai, Y. M. Newhouse, M., F. Zhou, K. H. Weisgraber, Journal of Biological Chemistry, 276, 39138-39142, 2001.
dc.descriptionJournal of Biological Chemistry, 276, 39138-39142
dc.descriptionNote : if this item contains full text it may be a preprint, author manuscript, or a Gold OA copy that permits redistribution with a license such as CC BY. The final version is available through the publisher’s platform.
dc.description.abstractDefective binding of apolipoprotein E (apoE) to heparan sulfate proteoglycans (HSPGs) is associated with increased risk of atherosclerosis due to inefficient clearance of lipoprotein remnants by the liver. The interaction of apoE with HSPGs has also been implicated in the pathogenesis of Alzheimer’s disease and may play a role in neuronal repair. To identify which residues in the he parin-binding site of apoE and which structural elements of heparan sulfate interact, we used a variety of approaches, including glycosaminoglycan specificity as says, 13C nuclear magnetic resonance, and heparin affinity chromatography. The formation of the high affinity complex required Arg-142, Lys-143, Arg-145, Lys-146, and Arg-147 from apoE and N- and 6-O-sulfo groups of the glucosamine units from the heparin fragment. As shown by molecular modeling, using a high affinity binding octasaccharide fragment of heparin, these findings are consistent with a binding mode in which five saccharide residues of fully sulfated heparan sulfate lie in a shallow groove of the �-helix that contains the HSPG-binding site (helix 4 of the four-helix bundle of the 22-kDa fragment). This groove is lined with residues Arg-136, Ser-139, His 140, Arg-142, Lys-143, Arg-145, Lys-146, and Arg-147. In the model, all of these residues make direct contact with either the 2-O-sulfo groups of the iduronic acid monosaccharides or the N- and 6-O-sulfo groups of the glucosamine sulfate monosaccharides. This model indicates that apoE has an HSPG-binding site highly complementary to heparan sulfate rich in N- and O-sulfo groups such as that found in the liver and the brain.
dc.relation.ispartofThe Linhardt Research Labs Online Collection
dc.relation.ispartofRensselaer Polytechnic Institute, Troy, NY
dc.subjectChemistry and chemical biology
dc.subjectChemical and biological engineering
dc.subjectBiomedical engineering
dc.titleNew Insights into the Heparan Sulfate Proteoglycan binding Activity of Apolipoprotein E4
dc.rights.holderIn Copyright : this Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
dc.relation.departmentThe Linhardt Research Labs.
dc.relation.departmentThe Shirley Ann Jackson, Ph.D. Center for Biotechnology and Interdisciplinary Studies (CBIS)

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