Table 3.
Hydrogen bond interactions at the CA XII dimer interface
| Monomer A atom | Monomer B atom | Distance, Å |
|---|---|---|
| Glu-13 Oɛ2 | Lys-250 Nζ | 2.8 |
| Asn-14 O | Ser-17 Oγ | 2.6 |
| Asn-14 Nδ2 | Gln-249 Oɛ1 | 2.8 |
| Asn-14 Nδ2 | Cys-23 O | 3.0 |
| His-34 Nɛ2 | Asp-102 Oδ1 | 2.8 |
| Asp-36 Oδ2 | His-103 Nɛ2 | 2.9 |
| Gln-112 Nɛ2 | Ser-110 O | 2.9 |
| Gln-112 Nɛ2 | Gln-112 Nɛ2 | 2.6 |
| Phe-245 O | Lys-250 Nζ | 2.8 |
| Gln-247 Oɛ1 | Val-248 O | 3.0 |
The dimer interface exhibits noncrystallographic symmetry around a 2-fold axis. Therefore, for each interaction listed above, there is a corresponding symmetry-related interaction that is not listed, except for the self-complementary interaction between Gln-112.