Interaction of Heparin with Annexin V

Capila, Ishan
Vandernoot, Victoria A.
Mealy, Tanya R.
Seaton, Barbara A.
Linhardt, Robert J.
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Biology , Chemistry and chemical biology , Chemical and biological engineering , Biomedical engineering
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Interaction of Heparin with Annexin V, I. Capila, V. A. VanderNoot,T. R. Mealy, B. A. Seaton, RJ. Linhardt, FEBS Letters, 446,327-330, 1999.
The energetics and kinetics of the interaction of heparin with the Ca2+ and phospholipid binding protein annexin V, was examined and the minimum oligosaccharide sequence within heparin that binds annexin V was identified. Affinity chromatography studies confirmed the Ca2+ dependence of this binding interaction. Analysis of the data obtained from surface plasmon resonance afforded a Kd of approximately 21 nM for the interaction of annexin V with end-chain immobilized heparin and a Kd of approximately 49 nM for the interaction with end-chain immobilized heparan sulfate. Isothermal titration calorimetry showed the minimum annexin V binding oligosaccharide sequence within heparin corresponds to an octasaccharide sequence. The Kd of a heparin octasaccharide binding to annexin V was approximately 1 microM with a binding stoichiometry of 1:1.
FEBS Letters, 446, 327-330
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The Linhardt Research Labs.
The Shirley Ann Jackson, Ph.D. Center for Biotechnology and Interdisciplinary Studies (CBIS)
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Rensselaer Polytechnic Institute, Troy, NY
FEBS Letters