10.1016/0014-5793(85)80976-5

Low pH and phospholipase A2 treatment induce the phase-separation of non-bilayer lipids within pea chloroplast membranes

Abstract

AbstractExposure of chloroplasts to pH < 4.5, or incubation in the presence of phospholipase A2, leads to membrane lipid phase separations and the irreversible formation of non-bilayer lipid structures. Freeze-fracture replicas of the thylakoid membranes of treated chloroplasts are characterized by the presence of aggregates of cylindrical inverted lipid micelles. These structural changes are accompanied by an inhibition of photosystem II-mediated electron transport and a stimulation of photosystem I-mediated transport. These data have important implications both with respect to the factors governing the stability of thylakoid membranes and the use of lipases as probes of chloroplast structure.MembranelipidHexagonalphaseFreeze-fractureChloroplas

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Last time updated on 6/5/2019

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