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. Author manuscript; available in PMC: 2013 Dec 21.
Published in final edited form as: ACS Chem Biol. 2012 Sep 26;7(12):1994–2003. doi: 10.1021/cb300385m

Figure 2.

Figure 2

Structure of activating STs. a) CurM ST polypeptide. The stereo ribbon diagram is colored as a rainbow from blue at the N-terminus to red at the C-terminus with PAP and Glu60, the proposed catalytic base, in stick (gray C). The active site flap (thick) is labeled. b) Topology diagram. CurM ST and OLS ST have an α/β core fold, like other STs, with inserted α-helices (α2–α4) and an extended loop wrapping around the core from α10–α11.