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. Author manuscript; available in PMC: 2017 Jun 1.
Published in final edited form as: J Mol Graph Model. 2016 Apr 27;67:33–43. doi: 10.1016/j.jmgm.2016.04.006

Figure 1.

Figure 1

a. The transpeptidation reaction catalyzed by SrtA involves two steps: an acylation reaction in which the sorting signal is cleaved and covalently attached to Cys184, and a deacetylation reaction in which the surface protein is transferred to a lipid II molecule. b. The “threonine out” (Thr-Out) configuration observed in the SrtA NMR structure [19]. c. The “threonine in” (Thr-In) configuration observed in the SrtB crystal structure [20].