Abstract
The release of fatty acids from membranous and storage lipids has been implicated in a variety of cellular functions, including carbon partitioning, cell elongation, defense response, seedling establishment, and plant growth. Patatin-related proteins are the major enzymes that catalyze the release of fatty acids and are present in various organisms, including plants and mammals. The Arabidopsis genome has 13 patatin-like genes encoding proteins including three groups of patatin-related phospholipases, pPLAI, pPLAII (α,β,γ,δ,ε), and pPLAIII (α,β,γ,δ). The pPLAI, pPLAIIs, and pPLAIIIs possess phospholipase and galactolipase activities, while pPLAIIIs have an additional acyl-CoA thioesterase activity. The fourth group of patatin-related proteins possesses triacylglycerol lipase activity and includes SDP1, SDP1-L, and ATGL-L. Phenotypic analyses of Arabidopsis deficient in and overexpressing specific patatin-related genes have revealed their important roles in stress responses, plant development, and lipid homeostasis. This chapter aims to summarize current knowledge of patatin-related proteins and document their emerging importance in plant growth and lipid metabolism.
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Acknowledgments
The work is supported by grants from Natural Science Foundation (MCB-0922879 and IOS-0818740 to X.W.) and work on lipid production was supported by the U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (BES), Materials Sciences and Engineering Division under Award # DE-SC0001295 to X.W.
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Li, M., Wang, X. (2014). pPLA: Patatin-Related Phospholipase As with Multiple Biological Functions. In: Wang, X. (eds) Phospholipases in Plant Signaling. Signaling and Communication in Plants, vol 20. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-42011-5_5
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DOI: https://doi.org/10.1007/978-3-642-42011-5_5
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