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. 2014 Jun 3;23(8):1102–1112. doi: 10.1002/pro.2496

Figure 4.

Figure 4

Interactions between the RnQSOX1 cis-proline and the target of nucleophilic attack. (A) The two RnQSOX1 CXXC motifs, at the amino-termini of their respective helices (cylinders), are shown in relation to cis-proline P122. Dashed lines indicate potential hydrogen bonds. Hydrogen bonds in black are shown in a different orientation in panel B. (B) Hydrogen bonding from the amino acid residue immediately upstream of the cis-proline to the substrate peptide is compared among RnQSOX1, a glutathione/glutaredoxin complex (PDB code 3FZ9), and a complex between thioredoxin and a target protein (PDB code 2IWT). Numbers indicate distances in Ångstrom.