SCOP 1.67: Superfamily f.21.1: Transmembrane di-heme cytochromes

Lineage for Superfamily f.21.1: Transmembrane di-heme cytochromes

1. Root: SCOP 1.67

2. Class f: Membrane and cell surface proteins and peptides [56835] (42 folds)

3. Fold f.21: Heme-binding four-helical bundle [81344] (3 superfamilies)
   core: four transmembrane helices, up-and-down bundle, binds one or two heme groups in between the helices

4. Superfamily f.21.1: Transmembrane di-heme cytochromes [81342] (2 families)
   Three of the four heme-ligands are conserved between the two families; both heme groups bind similarly but not identically

Families:

1. f.21.1.1: Formate dehydrogenase N, cytochrome (gamma) subunit [75645] (1 protein)

2. f.21.1.2: Cytochrome b of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) [81642] (2 proteins)
   a part (domain) of a larger mitochondrial cytochrome b subunit, separate subunit in plants and cyanobacteria

More info for Superfamily f.21.1: Transmembrane di-heme cytochromes

Timeline for Superfamily f.21.1: Transmembrane di-heme cytochromes:

• Superfamily f.21.1: Transmembrane di-heme cytochromes first appeared in SCOP 1.63
  
• Superfamily f.21.1: Transmembrane di-heme cytochromes appears in SCOP 1.65
  
• Superfamily f.21.1: Transmembrane di-heme cytochromes appears in SCOP 1.69
  
• Superfamily f.21.1: Transmembrane di-heme cytochromes appears in the current release, SCOPe 2.08