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. 1993 Mar;21(6):965-72.
doi: 10.1007/BF00023595.

Proteins encoded by an auxin-regulated gene family of tobacco share limited but significant homology with glutathione S-transferases and one member indeed shows in vitro GST activity

F N Droog  1 , P J Hooykaas, K R Libbenga, E J van der Zaal
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Proteins encoded by an auxin-regulated gene family of tobacco share limited but significant homology with glutathione S-transferases and one member indeed shows in vitro GST activity

F N Droog et al. Plant Mol Biol. 1993 Mar.

Abstract

A number of cDNAs corresponding to auxin-regulated mRNAs have been isolated from tobacco and found to be encoded by a multigene family consisting of three subfamilies. Homologous proteins have been isolated independently from soybean and potato. Here we report that the encoded proteins show a limited but significant homology to both plant and animal glutathione S-transferases (GST, EC 2.5.1.18). For the protein NT103, encoded by a member of the Nt103 subfamily, we demonstrate an in vitro GST activity. This is the first time a function is attributed to a member of this group of auxin-induced proteins or any of its homologues. The implications of this finding and the possible relationships between auxins and GSTs are discussed.

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