Abstract
Glutathione S-transferases (GSTs) are prevalent enzymes, capable of multifaceted tasks like cellular detoxification and stress resistance. Our study was focused on the thorough genome-wide investigation of the GST gene family in the soybean (G. max). The results of this study led to the identification of no less than 74 GST genes in soybean, which is higher than several other reported species. Phylogenetic analysis indicated that GSTs can be subdivided into various classes with each individual class being significantly conserved. Maximum members of the GST family has found in tau class being 37 members, preceding phi and lambda class. Studies for chromosomal localization demonstrated significantly lopsided allocation of GmGST genes all over the soybean genome. Several members of GmGST revealed tissue-specific expression during the transcript profiling for 74 GmGST genes. Furthermore, responsive cis-regulatory elements have found in GmGST genes during promoter analysis. The 12 paralogous pairs have found due to segmental duplication in the GmGST gene family and present on 19 different chromosomes. The Ka/Ks ratio of paralogous pair showed that the evolution in duplicated genes was under purifying selection and duplication has done during recent and ancient times as well. Such findings will help for future studies on GST genes in soybean related to the functional and evolutionary characterization.
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