EC Number   |
Cofactor |
Reference |
|---|
   2.8.5.2 | cytochrome |
SoxXA is a heterodimeric c-type cytochrome |
748677 |
| 2.8.5.2 | cytochrome c |
cytochrome c complex |
748504 |
| 2.8.5.2 | cytochrome c |
SoxAX is a naturally occurring c-type cytochrome in which a thiolate-coordinated heme is identified |
747055 |
| 2.8.5.2 | cytochrome c |
SoxXA represents a novel type of periplasmic c-type cytochromes, with SoxX as a monoheme and SoxA as a hybrid diheme cytochrome c |
748074 |
| 2.8.5.2 | heme |
analysis of three heme sites. Heme-3 in the ferric state is characterized by a large EPR signal and has histidine and methionine axial heme iron ligands which are retained on reduction to the ferrous state. Heme-1 and heme-2 both have thiolate plus nitrogenous ligand sets in the ferric state and give rise to rhombic EPR spectra. Heme-1, whose ligands derive from cysteinate and histidine residues, remains ferric in the presence of dithionite ion. Ferric heme-2 exists with a preparation-dependent mixture of two different ligand sets, one being cysteinate/histidine, the other an unidentified pair with a weaker crystal-field strength. Upon reduction of the SoxAX complex with dithionite, a change occurs in the ligands of heme-2 in which the thiolate is either protonated or replaced by an unidentified ligand |
747055 |
| 2.8.5.2 | heme |
distance measurements between the three heme groups |
748504 |
| 2.8.5.2 | heme |
haemoprotein, the SoxAX active site contains a hemw with unprecedented cysteine persulfide (cysteine sulfane) coordination |
747649 |
| 2.8.5.2 | heme |
one heme is assigned to subunit SoxX and two hemes to subunit SoxA |
747161 |
| 2.8.5.2 | heme |
presence of three heme groups, one of which (heme 3) has a His/Met axial coordination and is located on the SoxX subunit. Heme 1 and heme 2 are located on the SoxA subunit, both of which have EPR parameters characteristic for an axial His/thiolate coordination. The midpoint potentials of heme 3 (Em3: +189 mV) and heme 2 (Em2: -432 mV) are determined. Heme 1 is not reducible even with 20 mM titanium(III) citrate. The Em2 midpoint potential is pH dependent. It is proposed that heme 2 participates in the catalysis and that the cysteine persulfide ligation leads to the unusually low redox potential (-436 mV) |
747062 |
| 2.8.5.2 | heme |
SoxXA represents a novel type of periplasmic c-type cytochromes, with SoxX as a monoheme and SoxA as a hybrid diheme cytochrome c |
748074 |
