Table 2.
Binding Site | Binding Parameters | Stereoisomers of Soman | |||
---|---|---|---|---|---|
P(−)C(−) | P(+)C(−) | P(−)C(+) | P(+)C(+) | ||
Ser193 | Kd, μM | 518 ± 14 | 598 ± 5 | 787 ± 27 | 633 ± 7 |
dist(P-O(N)), nm | 0.38 | 0.41 | 0.37 | 0.40 | |
Lys402 | Kd, μM | 737 ± 27 | 902 ± 45 | 763 ± 25 | 1031 ± 70 |
dist(P-O(N)), nm | 0.37 | 0.43 | 0.37 | 0.55 |
Kd—the dissociation constant of an obtained complex; dist (P-O(N))—the distance between the phosphorus atom of soman and the hydroxyl oxygen atom (nitrogen in the case of lysine) of an amino acid studied.