Abstract
Differences in the interaction of Ca 2+ and Mg 2+ with phosphatidylserine vesicles were revealed by binding studies, differential scanning calorimetry and X-ray diffraction. The two cations produced structurally different complexes with phosphatidylserine as evidenced by phase transition characteristics, lamellar spacings, and hydrocarbon packing. Ca 2+ effectively competes with Mg 2+ for phosphatidylserine binding sites. Analysis of the binding data showed that Ca 2+ had a ten-fold greater intrinsic binding constant for phosphatidylserine.
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Schedule a callMore From: Biochimica et Biophysica Acta (BBA) - Biomembranes
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