Protein Machineries Involved in the Attachment of Heme to Cytochrome c: Protein Structures and Molecular Mechanisms

Figure 3

Schematic representation of the protein components of System II. Proteins involved in the heme translocation and delivery and in the apoCyt chaperoning and heme attachment processes are shown in light brown; proteins involved in the apoCyt thioreduction pathway are shown in green. Cyt c and apoCyt (represented as a cartoon) are shown in blue. The 3D structure of the soluble periplasmic domain of Bs-ResA is shown in green (Protein Data Bank accession number is 1ST9 [24]. System II is found in plant chloroplasts, in gram-positive bacteria, cyanobacteria, -proteobacteria, most -proteobacteria (e.g., Bordetella, Burkholderia), and some -proteobacteria (e.g., Geobacter).