| Compounds | Affinity (kcal/mol) | H-bond | Residual amino acid interactions | Hydrophobic/Pi-cation/Pi-anion/Pi-alkyl interactions | Van-der walls interactions |
| 4 | −5.9 | Glu-356 | -- | Arg-35, Ser-349, His-353, Asn-352, Asp-335, Ile-355, Ala-359 | 7 | −5.8 | Ser-141 | Glu-138, Asn-360 | Phe-142, Thr-139, Val-140 | 9 | −5.9 | Ser-141, Asn-360 | Glu-138, Thr-139 | Glu-356, Val-140, Phe-142 | 10 | −5.9 | Ser-141, Asn-360, Thr-139 | Glu-138 | Glu-356, Val-140 | 12 | −5.7 | Ser-141, Asn-360, Thr-139 | Phe-142 | Val-140 | 15 | −4.7 | Val-140 | Phe-142, Asn-360 | Ser-141, Thr-139 | 17 | −4.5 | Glu-138 | -- | Ser-141, Phe-142, Val-140, Asn-360, Thr-139 | 20 | −4.8 | Asn-352 | Arg-35, Glu-356, Ile-355, Ser-349, Asp-335 | His-353 | 21 | −5.4 | Val-140 | Glu-138 | Thr-139, Phe-142 | Ciprofloxacin | −4.9 | Glu-138, Ser-141, Asn-360 | Thr-139, Glu-356, Arg-35 | Met-154 |
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