SCOPe 2.02: Domain d1sqxc2: 1sqx C:2-260

Lineage for d1sqxc2 (1sqx C:2-260)

1. Root: SCOPe 2.02

2. Class f: Membrane and cell surface proteins and peptides [56835] (57 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] (3 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] (17 PDB entries)
   Uniprot P00157

8. Domain d1sqxc2: 1sqx C:2-260 [119040]
   Other proteins in same PDB: d1sqxa1, d1sqxa2, d1sqxb1, d1sqxb2, d1sqxc1, d1sqxd1, d1sqxd2, d1sqxf_, d1sqxg_, d1sqxh_, d1sqxi1, d1sqxj_, d1sqxk_
   automatically matched to d1be3c3
   complexed with fes, hem, sma, uq2

Details for d1sqxc2

PDB Entry: 1sqx, 2.6 Å

PDB Description: crystal structure analysis of bovine bc1 with stigmatellin a

PDB Compounds: (C:) cytochrome b

SCOPe Domain Sequences for d1sqxc2:

Sequence; same for both SEQRES and ATOM records:

>d1sqxc2 f.21.1.2 (C:2-260) Mitochondrial cytochrome b subunit, N-terminal domain {Cow (Bos taurus) [TaxId: 9913]}
tnirkshplmkivnnafidlpapsnisswwnfgsllgiclilqiltglflamhytsdttt
afssvthicrdvnygwiirymhangasmfficlymhvgrglyygsytfletwnigvilll
tvmatafmgyvlpwgqmsfwgatvitnllsaipyigtnlvewiwggfsvdkatltrffaf
hfilpfiimaiamvhllflhetgsnnptgissdvdkipfhpyytikdilgalllilalml
lvlfapdllgdpdnytpan

Timeline for d1sqxc2:

• d1sqxc2 first appeared in SCOP 1.73
  
• d1sqxc2 appears in SCOPe 2.01
  
• d1sqxc2 appears in SCOPe 2.03
  
• d1sqxc2 appears in the current release, SCOPe 2.08