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Purification, molecular cloning, and characterization of glutathione S-transferases (GSTs) from pigmented Vitis vinifera L. cell suspension cultures as putative anthocyanin transport proteins

Identifieur interne : 000891 ( Ncbi/Curation ); précédent : 000890; suivant : 000892

Purification, molecular cloning, and characterization of glutathione S-transferases (GSTs) from pigmented Vitis vinifera L. cell suspension cultures as putative anthocyanin transport proteins

Auteurs : Simon Conn ; Chris Curtin ; Annie Bézier [France] ; Chris Franco ; Wei Zhang

Source :

RBID : PMC:2561157

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.


Url:
DOI: 10.1093/jxb/ern217
PubMed: 18836188
PubMed Central: 2561157

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Simon Conn
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<nlm:aff id="aff1">Department of Medical Biotechnology, Flinders University, Adelaide, Australia, 5042</nlm:aff>
<wicri:noCountry code="subfield">5042</wicri:noCountry>
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<affiliation>
<nlm:aff id="aff2">School of Agriculture, Food and Wine, The University of Adelaide, Waite Campus, Urrbrae, Australia, 5064</nlm:aff>
<wicri:noCountry code="subfield">5064</wicri:noCountry>
</affiliation>
Simon Conn
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Chris Curtin
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Chris Curtin
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Chris Franco
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Wei Zhang
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<wicri:noCountry code="subfield">5042</wicri:noCountry>
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L. cell suspension cultures as putative anthocyanin transport proteins</title>
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<p>The ligandin activity of specific glutathione
<italic>S</italic>
-transferases (GSTs) is necessary for the transport of anthocyanins from the cytosol to the plant vacuole. Five GSTs were purified from
<italic>Vitis vinifera</italic>
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
<italic>Escherichia coli</italic>
used to confirm GST activity. Transcriptional profiling of these candidate GST genes and key anthocyanin biosynthetic pathway genes (
<italic>PAL</italic>
,
<italic>CHS</italic>
,
<italic>DFR</italic>
, and
<italic>UFGT</italic>
) in cell suspensions and grape berries against anthocyanin accumulation demonstrated strong positive correlation with two sequences,
<italic>VvGST1</italic>
and
<italic>VvGST4</italic>
, respectively. The ability of VvGST1 and VvGST4 to transport anthocyanins was confirmed in the heterologous maize
<italic>bronze-2</italic>
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
<italic>in planta</italic>
and
<italic>in vitro</italic>
suspension cells.</p>
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