Table 4.
Phi/Psi values of the nucleophile position (Nu) and the position after the nucleophile (Nu+1) in wild type and glycine mutants extracted from their respective crystal structures. Additionally, distances of main chain hydrogen bonds formed by these positions and their angles are listed.
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| Nucleophile (Nu) position
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| Protein | omega (ω) [-Cα(Nu)-CO(Nu)- NH(Nu+1)-Cα(Nu+1)-] (°) | phi (φ) (°) | psi (ψ) (°) | C=O(Nu)…H–N(Nu+3) (Å) | H-bond Angle (°) |
| TEM-1 WT | 177 | −65.2 | −8.15 | 3.01 | 140 |
| TEM-1 S70G | 179 | −54.4 | −15.4 | 2.91 | 147 |
| CTX-M-14 WT | 172 | −71.3 | −4.76 | 1.96 | 138 |
| CTX-M-14 S70G | 176 | −67.2 | −4.19 | 2.00 | 134 |
| P99 WT | 176 | −61.2 | −14.9 | 1.97 | 156 |
| P99 S64G | 177 | −58.9 | −12.8 | 3.19 | 163 |
| OXA-48 WT | 174 | −68.1 | −10.8 | 2.94 | 136 |
| OXA-48 S70A | 175 | −67.1 | −10.3 | 2.97 | 135 |
| OXA-48 S70G | 177 | −53.5 | −21.5 | 3.04 | 163 |
| OXA-163 WT | 176 | −72.4 | −10.4 | 2.91 | 135 |
| OXA-163 S70G | 179 | −58.8 | −19.9 | 2.94 | 160 |