Figure 3. Homology model of cytochrome c-554 from Methylosinus trichosporium OB3b.
The structure template used is cytochrome c 2 from Rhodopseudomonas viridis (PDBid: 1CO6) [37]. The amino acid sequence of these two proteins has 56 (52%) identical residues and a total of 74 (69%) positives (identical residues or conservative mutations). High similarity with the mitochondrial cytochrome c is found, and sequence alignment reveals a highly conserved region in the loop containing the heme axial ligand methionine. The molecular drawing was made with Pymol, DeLano Scientific, San Carlos, CA.