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Large-scale determination of sequence, structure, and function relationships in cytosolic glutathione transferases across the biosphere.
(2014) PLoS Biol 12
PubMed: 24756107 | PubMedCentral: PMC3995644 | DOI: 10.1371/journal.pbio.1001843
Inspection of the available structures from non-Main.2 subgroups with DSBR activity shows that there is a lack of conservation of residues corresponding to Main.2 Arg152 and Gln57 (4IKH numbering) and... inspection of the MSA shows that no clear alternative sub-motif exists ( Figures 9C and S4 ).
Figure 9A and 9B show active site residue interactions with the substrate(s) from two of the most remotely related subgroups that include proteins with DSBR activity: Main.2 (using a structure from this work, 4IKH from Pseudomonas fluorescens , as the example structure in Figure 9A ) and Xi.1 (using 3PPU from Phanerochaete chrysosporium as the example structure in Figure 9B ).
There are 44 sequences in 36 representative nodes that have experimental evidence for this activity (16 determined by this work and 28 proteins reported in the literature); 13 of these proteins have been structurally characterized  ,  ,  –  including three proteins with structures determined for this work (PDB codes 4ECI and 4ECJ [UniProt Q02KA8], 4HI7 [B4KM86], and 4IKH [Q4KED9]).
(A) Structure of Q4KED9 (UniProt accession) from Pseudomonas fluorescens (PDB ID 4IKH, subgroup Main.2), one of the new structures from this work, showing two molecules of glutathione bound in the active site.
Publication Year: 2014
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