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Plant Physiology 82:448-453 (1986)
© 1986 American Society of Plant Biologists

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Articles

Activity of Acyl Carrier Protein Isoforms in Reactions of Plant Fatty Acid Metabolism

Daniel J. Guerra, John B. Ohlrogge and Margrit Frentzen

Northern Regional Research Center, Agriculture Research Service, United States Department of Agriculture, Peoria, Illinois 61604, Institüt fur Allgemeine Botanik und Botanischer Garten, Universität Hamburg, West Germany

Two forms of spinach acyl carrier protein (ACP-I and ACP-II) have recently been characterized and found to be expressed in a tissue-specific manner (JB Ohlrogge, TM Kuo, 1985 J Biol Chem 260: 8032). To examine possible different functions for these ACP isoforms, we have tested purified preparations of spinach leaf ACP-I and ACP-II and Escherichia coli ACP in several in vitro reactions of fatty acid metabolism. Total de novo fatty acid synthesis and malonyl-CoA:ACP transacylase do not appear to discriminate between acyl carrier protein isoforms. In contrast, the Km of oleoyl-ACP thioesterase for oleoyl-ACP-II is 10-fold higher than for oleoyl-ACP-I, whereas the Km of acyl-ACP glycerol-3-phosphate acyl transferase is 5-fold higher for oleoyl-ACP-I than for oleoyl-ACP-II. A characterization of these reactions and a possible role for ACP isoforms in regulation of fatty acid metabolism in plants are described.




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J. K. Branen, D. K. Shintani, and N. J. Engeseth
Expression of Antisense Acyl Carrier Protein-4 Reduces Lipid Content in Arabidopsis Leaf Tissue
Plant Physiology, June 1, 2003; 132(2): 748 - 756.
[Abstract] [Full Text] [PDF]

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 Plant Physiol.Home page
J. K. Branen, T.-J. Chiou, and N. J. Engeseth
Overexpression of Acyl Carrier Protein-1 Alters Fatty Acid Composition of Leaf Tissue in Arabidopsis
Plant Physiology, September 1, 2001; 127(1): 222 - 229.
[Abstract] [Full Text] [PDF]


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Copyright © 1986 by the American Society of Plant Biologists