SCOP 1.71: Domain d1sqbc2: 1sqb C:2-260

Lineage for d1sqbc2 (1sqb C:2-260)

1. Root: SCOP 1.71

2. Class f: Membrane and cell surface proteins and peptides [56835] (49 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

5. Family 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

6. Protein Mitochondrial cytochrome b subunit, N-terminal domain [81641] (3 species)
   also includes extra transmembrane (linker) helix absent in plants and cyanobacteria subunits

7. Species Cow (Bos taurus) [TaxId:9913] [81638] (12 PDB entries)

8. Domain d1sqbc2: 1sqb C:2-260 [105895]
   Other proteins in same PDB: d1sqba1, d1sqba2, d1sqbb1, d1sqbb2, d1sqbc1, d1sqbd1, d1sqbd2, d1sqbe1, d1sqbe2, d1sqbf_, d1sqbg_, d1sqbh_, d1sqbi_, d1sqbj_, d1sqbk_
   complexed with azo, fes, hem

Details for d1sqbc2

PDB Entry: 1sqb, 2.69 Å

PDB Description: Crystal Structure Analysis of Bovine Bc1 with Azoxystrobin

SCOP Domain Sequences for d1sqbc2:

Sequence; same for both SEQRES and ATOM records:

>d1sqbc2 f.21.1.2 (C:2-260) Mitochondrial cytochrome b subunit, N-terminal domain {Cow (Bos taurus)}
tnirkshplmkivnnafidlpapsnisswwnfgsllgiclilqiltglflamhytsdttt
afssvthicrdvnygwiirymhangasmfficlymhvgrglyygsytfletwnigvilll
tvmatafmgyvlpwgqmsfwgatvitnllsaipyigtnlvewiwggfsvdkatltrffaf
hfilpfiimaiamvhllflhetgsnnptgissdvdkipfhpyytikdilgalllilalml
lvlfapdllgdpdnytpan

Timeline for d1sqbc2:

• d1sqbc2 first appeared in SCOP 1.69
  
• d1sqbc2 appears in SCOP 1.73
  
• d1sqbc2 appears in the current release, SCOPe 2.08