Summary
Platelet activating factor (=PAF) stimulates H+ transport in microsomes from zucchini hypocotyl (1) and ATP hydrolysis. The apparent membrane permeability for protons in membrane vesicles is not changed by PAF and in ATP hydrolysis rather vmax than the Km is changed by PAF. PAF stimulation of H+ transport is dependent on the presence of a protein factor which can be removed from the membranes. The properties of PAF-dependent protein factor in DEAE-Sephacel chromatography are very similar to a protein kinase. PAF stimulation of ATP hydrolysis and H+ transport is found in tonoplast and plasma membranes. A possible role for the PAF-dependent factor analogous to animal protein kinase C in plant hormone action is postulated.
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Scherer, G.F.E., Martiny-Baron, G. (1987). Stimulation of In Vitro H+ Transport in Zucchini Microsomes by the Ether Lipid Platelet Activating Factor and a Soluble Protein. In: Klämbt, D. (eds) Plant Hormone Receptors. NATO ASI Series, vol 10. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-72779-5_16
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DOI: https://doi.org/10.1007/978-3-642-72779-5_16
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