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Plastidic ABC Proteins

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Plant ABC Transporters

Part of the book series: Signaling and Communication in Plants ((SIGCOMM,volume 22))

Abstract

ATP-binding cassette (ABC) proteins belong to a large family of proteins which mostly catalyze ATP-driven membrane translocation. They are found throughout the tree of life, from Archaea to Eukarya. In plants, they are known to perform essential functions in multiple subcellular compartments, though the locations of each ABC protein in a given species have not yet been defined. Here, we mine available proteomic, targeting, and fluorescence localization data to identify the subcellular location of each predicted ABC protein of Arabidopsis. Then we examine the functions of plastidic ABC proteins in detail. Transport functions are particularly important to the plastid, where a diverse group of substrates must be transported to allow specialized plastid metabolic functions to occur. Plastidic transporters that remain unidentified have been hypothesized based on known substrate translocation events. We attempt to narrow this gap by compiling available information about each plastidic ABC protein, including the primary literature, Chloroplast 2010 database information, transcriptomic data, coexpression analyses, and phylogenic data. This process ultimately allows us to make new hypotheses about the function of several plastidic ABC proteins and to identify a new family member of the AtABCI subfamily.

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Acknowledgments

We apologize to any authors we did not cite, and we thank Que Kong for her expert translation of a relevant article. Funding on the TGD ABC transporters in the Benning lab is supported by a grant from the National Science Foundation, MCB1157231.

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Correspondence to Rebecca L. Roston .

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© 2014 Springer International Publishing Switzerland

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Roston, R.L., Hurlock, A.K., Benning, C. (2014). Plastidic ABC Proteins. In: Geisler, M. (eds) Plant ABC Transporters. Signaling and Communication in Plants, vol 22. Springer, Cham. https://doi.org/10.1007/978-3-319-06511-3_7

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