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Figure 4 | BMC Structural Biology

Figure 4

From: Characterizing structural features of cuticle-degrading proteases from fungi by molecular modeling

Figure 4

Superimposition of the calcium binding sites of 1IC6, PR1, VCP1 and Ver112. (A) Ca1 site. The calcium ion is coordinated by the carboxyl groups of Asp200 and the carbonyl oxygen atoms of Pro175 and Val/Ala177 (1IC6 numbering) in all four proteases, with residues from 1IC6, PR1, VCP1 and Ver112 colored yellow, blue, green and red, respectively. (B) Ca2 site. The calcium ion is coordinated by the carbonyl oxygen atom of Thr16 and carboxyl groups of Asp260 only in 1IC6 (yellow), with the Arg16 and Val/Ala260 in PR1 (blue), VCP1 (green) and Ver112 (red) also displayed to highlight their differences with the Ca2 of 1IC6.

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