Fig. 2: SxtT and GxtA showcase structurally similar trimeric architectures and metallocenter arrangements.
From: Structural basis for divergent C–H hydroxylation selectivity in two Rieske oxygenases
a The monomeric unit of SxtT reveals that the metallocenters are located approximately 45-Å apart. b The trimeric quaternary structures of SxtT (colors) and GxtA (gray) are overlaid with one another. The trimeric arrangement of subunits allows for the close positioning of the metallocenters. c Two residues, Asp161 and Tyr76, which are found at the subunit-subunit interface of both SxtT (top panel) and GxtA (bottom panel, same residue numbering as SxtT) bridge the Rieske cluster to the non-heme iron center. SxtT is shown in purple and cyan and GxtA is gray.
