Table 6. SORs Catalytic Center Ligands and “Key” Amino Acid Residues.
| “key residues” |
catalytic Fe ligands – center II |
|||||||
|---|---|---|---|---|---|---|---|---|
| Glu | Lys | His | His | His | Cys | His | site-directed mutants | |
| 1Fe-SOR | ||||||||
| P. furiosus | E14 | K15 | H16 | H41 | H47 | C111 | H114 | |
| P. horikoshi | E23 | K24 | H25 | H50 | H56 | C111 | H114 | |
| D. gigas | E15 | K16 | H17 | H45 | H51 | C115 | H118 | |
| A. fulgidus | E12 | K13 | H14 | H40 | H46 | C110 | H113 | Glu12Val, Glu12Gln372b |
| T. maritima | E15 | K16 | H17 | H45 | H51 | C115 | H118 | |
| T. pallidum | E48 | K40 | H50 | H70 | H76 | C119 | H122 | Glu48Ala372i |
| N. equitans | K9 | H10 | H35 | H41 | C97 | H100 | ||
| I. hospitalis | E23 | H25 | H50 | H56 | C109 | H112 | Glu23Ala, Thr24Lys383 | |
| 2Fe-SOR | ||||||||
| D. vulgaris | E47 | K48 | H49 | H69 | H74 | C115 | H118 | Glu47Ala, Glu48Ala372c |
| D. desulfuricans | E47 | K48 | H49 | H69 | H74 | C115 | H118 | |
| D. baarsii | E47 | K48 | H49 | H69 | H74 | C115 | H118 | Glu47Ala, Lys48Ile372d,372g |
| A. fulgidus | E47 | K48 | H49 | H69 | H74 | C115 | H118 | |