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. 2019 Jun 13;18(2):987–996. doi: 10.3892/etm.2019.7667

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Copyright: © Wang et al.

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Figure 7. — Molecular docking analysis of the binding interaction of COX II with non-ionizing EA (A-C), C4-OH-ionizing EA (D-F), and C-3-OH-ionizing EA (G-I). (A, D and G) The dominant docking result for non-ionizing EA (A), C4-OH-ionizing EA (D) and C-3-OH-ionizing EA (G) inside the peroxidase active site of COX II. The protein structure is shown in a flat ribbon format. In P⁺Fe^IV, carbon is colored in orange, nitrogen in blue, oxygen in red, hydrogen in white, and iron in navy blue. In EA, carbon is colored in green, oxygen in red, and hydrogen in white. (B, E and H) The same structure as in respective panels (A, D and G) with a white dash line added to indicate the distance between Fe⁴⁺ ion and O in one of EA's OHs. (C, F and I) Suggested potential hydrogen bonds (green dash lines) between the amino acid residues and the non-ionizing EA (C), C-4-OH-ionizing EA (F), and C-3-OH-ionizing EA (I). The amino acid residues are colored in light blue. EA, ellagic acid; COX I and COX II, cyclooxygenase I and II, respectively.