Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/52354
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Type: Journal article
Title: Purification, molecular cloning, and characterization of glutathione S-transferases (GSTs) from pigmented Vitis vinifera L. cell suspension cultures as putative anthocyanin transport proteins
Author: Conn, S.
Curtin, C.
Beizer, A.
Franco, C.
Zhang, W.
Citation: Journal of Experimental Botany, 2008; 59(13):3621-3634
Publisher: Oxford Univ Press
Issue Date: 2008
ISSN: 0022-0957
1460-2431
Statement of
Responsibility: 
Simon Conn, Chris Curtin, Annie Bézier, Chris Franco and Wei Zhang
Abstract: The ligandin activity of specific glutathione S-transferases (GSTs) is necessary for the transport of anthocyanins from the cytosol to the plant vacuole. Five GSTs were purified from Vitis vinifera L. cv. Gamay Fréaux cell suspension cultures by glutathione affinity chromatography. These proteins underwent Edman sequencing and mass spectrometry fingerprinting, with the resultant fragments aligned with predicted GSTs within public databases. The corresponding coding sequences were cloned, with heterologous expression in Escherichia coli used to confirm GST activity. Transcriptional profiling of these candidate GST genes and key anthocyanin biosynthetic pathway genes (PAL, CHS, DFR, and UFGT) in cell suspensions and grape berries against anthocyanin accumulation demonstrated strong positive correlation with two sequences, VvGST1 and VvGST4, respectively. The ability of VvGST1 and VvGST4 to transport anthocyanins was confirmed in the heterologous maize bronze-2 complementation model, providing further evidence for their function as anthocyanin transport proteins in grape cells. Furthermore, the differential induction of VvGST1 and VvGST4 in suspension cells and grape berries suggests functional differences between these two proteins. Further investigation of these candidate ligandins may identify a mechanism for manipulating anthocyanin accumulation in planta and in vitro suspension cells.
Keywords: Anthocyanin transport; glutathione S-transferase; ligandin; plant cell culture; Vitis vinifera
Rights: © 2008 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. This paper is available online free of all access charges (see http://jxb.oxfordjournals.org/open_access.html for further details)
RMID: 0020083402
DOI: 10.1093/jxb/ern217
Appears in Collections:Agriculture, Food and Wine publications

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