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. 2015 Nov 26;71(Pt 12):2396–2411. doi: 10.1107/S1399004715018714

Figure 4.

Figure 4

Geometry of the T1 site and TNC. (a) Tth-MCO. Note the hydroxide ligand (coral cylinder) in the RS asymmetrically bridging the binuclear T3Cu–T3′Cu cluster and Met455 flanking T1Cu. (b) Apo Tth-MCO structure. Note the absence of electron density for T1Cu and the TNC (superior view). A water molecule (red sphere) in the same position as OH− observed in (a) was found in this inactive apo form. (c) Hg-Tth-MCO-2h. Note that the view of TNC is the same that in (a) and a water molecule (red sphere) bridging the T3Cu–T3′Cu cluster was also found in this inactive form with Hg bound. The 2F o − F c electron-density map contoured at the 1σ level is drawn in blue. Metal ions are represented as spheres. Distances are in Å.