Early events in calcium-induced liposome fusion |
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| Authors: | Douglas C Miller Gerhard P Dahl |
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| Institution: | Department of Physiology and Biophysics, University of Miami School of Medicine, Miami, FL 33101 U.S.A. |
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| Abstract: | Calcium-induced interaction of liposomes composed of pure phosphatidylserine (PS) has been studied using a rapid-mixing, rapid-freeze device. Freeze-fracture electron microscopy of this material revealed that liposomes react very rapidly after addition of calcium ions. After only 10 ms (the resolution of the technique) vesicle fusion was apparent. At the same time, however, vesicles also collapsed, and appeared as aggregates of flattened membranes. This may explain controversies which have arisen over vesicle fusion studied with more indirect methods. |
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| Keywords: | Membrane fusion Liposome Phosphatidylserine (Stopped flow/rapid freeze technique) |
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