Abstract
Superoxide dismutase (SOD, EC 1.15.1.1) is an enzyme catalyzing the dismutation of superoxide radical to hydrogen peroxide and dioxygen. To date, four types of SODs — Cu/ZnSOD, MnSOD, FeSOD, and NiSOD — have been identified. In this study, SOD proteins of Brachypodium distachyon (L.) Beauv. were screened by utilization of bioinformatics approaches. According to our results, Mn/FeSODs and Cu/ZnSODs of B. distachyon were found to be in basic and acidic character, respectively. Domain analyzes of SOD proteins revealed that iron/manganese SOD and copper/zinc SOD were within studied SOD proteins. Based on the seconder structure analyzes, Mn/FeSODs and Cu/ZnSODs of B. distachyon were found as having similar sheets, turns and coils. Although helical structures were noticed in the types of Mn/FeSODs, no the type of Cu/ZnSODs were identified having helical structures. The predicted binding sites of Fe/MnSODs and Cu/ZnSODs were confirmed for having His-His-Asp-His and His-His-His-Asp-Ser residues with different positions, respectively. The 3D structure analyzes of SODs revealed that some structural divergences were observed in patterns of SODs domains. Based on phylogenetic analysis, Mn/FeSODs were found to have similarities whereas Cu/ZnSODs were clustered independently in phylogenetic tree.
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Abbreviations
- SOD:
-
Superoxide dismutase
- FeSOD:
-
Iron superoxide dismutase
- MnSOD:
-
Manganese superoxide dismutase
- Cu/ZnSOD:
-
Copper/zinc superoxide dismutase
- ROS:
-
Reactive oxygen species
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Filiz, E., Koc, I. & Ozyigit, I.I. Comparative Analysis and Modeling of Superoxide Dismutases (SODs) in Brachypodium distachyon L.. Appl Biochem Biotechnol 173, 1183–1196 (2014). https://doi.org/10.1007/s12010-014-0922-2
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DOI: https://doi.org/10.1007/s12010-014-0922-2