Table 3.
Average bond lengths (Å) between nonheme iron and atoms in the catalytic cycle
| Statea |
H183 |
H187 |
D333 |
D333 |
CAR |
CAR |
Peroxide |
Peroxide |
|---|---|---|---|---|---|---|---|---|
| NE2 | NE2 | OD1 | OD2 | C1 | C9a | O1 | O2 | |
| (1) Resting |
2.1 |
2.2 |
2.1 |
2.8 |
– |
– |
– |
– |
| (Oxy: Fdrest) | ||||||||
| (2) Reduced |
2.1 |
2.1 |
2.0 |
2.6 |
– |
– |
– |
– |
| (Oxy: Fdred) | ||||||||
| (2’) CAR-bound |
2.1 |
2.3 |
2.0 |
2.6 |
4.3 |
4.2 |
– |
– |
| (Oxy: FdCAR) | ||||||||
| (3) Reduced CAR-bound |
2.2 |
2.1 |
Ab:1.9 |
Ab:2.7 |
4.6 |
4.7 |
– |
– |
| (Oxy: Fdred-CAR) |
B&Cb:2.0 |
B&Cb:2.2 |
||||||
| (3’) Oxygen-bound |
2.1 |
2.1 |
2.0 |
2.7 |
– |
– |
2.6 |
2.0 |
| (Oxy: FdO2) | ||||||||
| (4) CAR- and oxygen-bound |
2.1 |
2.1 |
1.9 |
2.6 |
4.6 |
4.5 |
Ab:2.5 |
Ab:1.9 |
| (Oxy: FdCAR-O2) | B&Cb:1.8 | B&Cb:1.8 |
a Numbers correspond to Figure 1.
b Alphabet indicates the chain name.