The multi-protein family of sulfotransferases in plants: composition, occurrence, substrate specificity, and functions

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Hirschmann, Felix; Krause, Florian; Papenbrock, Jutta: The multi-protein family of sulfotransferases in plants: composition, occurrence, substrate specificity, and functions. In: Frontiers in Plant Science 5 (2014). DOI: http://dx.doi.org/10.3389/fpls.2014.00556

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Sum total of downloads: 429




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Abstract: 
All members of the sulfotransferase (SOT, EC 2.8.2.-) protein family transfer a sulfuryl group from the donor 3’-phosphoadenosine 5’-phosphosulfate (PAPS) to an appropriate hydroxyl group of several classes of substrates. The primary structure of these enzymes is characterized by a histidine residue in the active site, defined PAPS binding sites and a longer SOT domain. Proteins with this SOT domain occur in all organisms from all three domains, usually as a multi-protein family. Arabidopsis thaliana SOTs, the best characterized SOT multi-protein family, contains 21 members. The substrates for several plant enzymes have already been identified, such as glucosinolates, brassinosteroids, jasmonates, flavonoids, and salicylic acid. Much information has been gathered on desulfoglucosinolate (dsGl) SOTs in A. thaliana. The three cytosolic dsGI SOTs show slightly different expression patterns. The recombinant proteins reveal differences in their affinity to indolic and aliphatic dsGls. Also the respective recombinant dsGl SOTs from different A. thaliana ecotypes differ in their kinetic properties. However, determinants of substrate specificity and the exact reaction mechanism still need to be clarified. Probably, the three-dimensional structures of more plant proteins need to be solved to analyze the mode of action and the responsible amino acids for substrate binding. In addition to A. thaliana, more plant species from several families need to be investigated to fully elucidate the diversity of sulfated molecules and the way of biosynthesis catalyzed by SOT enzymes.
License of this version: CC BY 4.0 Unported
Document Type: article
Publishing status: publishedVersion
Issue Date: 2014
Appears in Collections:Naturwissenschaftliche Fakultät

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pos. country downloads
total perc.
1 image of flag of Germany Germany 377 87.88%
2 image of flag of No geo information available No geo information available 12 2.80%
3 image of flag of China China 11 2.56%
4 image of flag of Netherlands Netherlands 6 1.40%
5 image of flag of United States United States 4 0.93%
6 image of flag of Turkey Turkey 3 0.70%
7 image of flag of Switzerland Switzerland 3 0.70%
8 image of flag of Taiwan Taiwan 2 0.47%
9 image of flag of India India 2 0.47%
10 image of flag of Hungary Hungary 1 0.23%
    other countries 8 1.86%

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