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The III2-IV(5B)1 respiratory supercomplex from S. cerevisiae

Analyse The III2-IV(5B)1 respiratory supercomplex from S. cerevisiae in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
6T15
Type
protein
Length
5,956 residues
Chains
33
Method
electron microscopy
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Cytochrome B-C1 complex subunit 1, mitochondrial; Cytochrome B-C1 complex subunit 2…
EC
7.1.1.8, 1.9.3.1
UniProt
P07256, P07257, P00163, P07143, P08067, P00127, P00128, P08525, P22289, P37299, P00401, P00410, P00420, P04037, P00425, P00427, P10174, P04039, P07255, Q01519, P32799, Q2V2P9, P53721
Ligands
PEF, CDL, PCF, HEM, HEC, FES, HEA, CUA, CU, MG, ZN
Pockets
20 · best druggability 0.91

Structure

electron microscopy · 23 distinct chains · 51% helix, 8% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
A, LCytochrome B-C1 complex subunit 1, mitochondrialprotein43139% helix, 17% strandP07256
B, MCytochrome B-C1 complex subunit 2, mitochondrialprotein35237% helix, 21% strandP07257
C, NCytochrome B-C1 complex subunit 2, mitochondrialprotein38565% helix, 2% strandP00163
D, OCytochrome C1, heme protein, mitochondrialprotein24739% helix, 8% strandP07143
E, PCytochrome B-C1 complex subunit rieske, mitochondrial (EC 7.1.1.8)protein18524% helix, 20% strandP08067
F, QCytochrome B-C1 complex subunit 6protein7563% helix, 0% strandP00127
G, RCytochrome B-C1 complex subunit 7protein12666% helix, 3% strandP00128
H, SCytochrome B-C1 complex subunit 8protein9353% helix, 12% strandP08525
I, TCytochrome B-C1 complex subunit 9protein5784% helix, 0% strandP22289
J, UCytochrome B-C1 complex subunit 10protein7645% helix, 7% strandP37299
aCytochrome C oxidase subunit 1 (EC 1.9.3.1)protein53465% helix, 1% strandP00401
bCytochrome C oxidase subunit 2 (EC 1.9.3.1)protein23631% helix, 24% strandP00410
cCytochrome C oxidase subunit 3 (EC 1.9.3.1)protein26969% helix, 0% strandP00420
dCytochrome C oxidase subunit 4, mitochondrial (EC 1.9.3.1)protein12115% helix, 17% strandP04037
eCytochrome C oxidase polypeptide 5B, mitochondrial (EC 1.9.3.1)protein13452% helix, 0% strandP00425
fCytochrome C oxidase subunit 6, mitochondrial (EC 1.9.3.1)protein10462% helix, 0% strandP00427
gCytochrome C oxidase subunit 7 (EC 1.9.3.1)protein5954% helix, 0% strandP10174
hCytochrome C oxidase polypeptide VIII, mitochondrial (EC 1.9.3.1)protein5151% helix, 0% strandP04039
iCytochrome C oxidase subunit 7A (EC 1.9.3.1)protein5582% helix, 0% strandP07255
jCytochrome C oxidase subunit 6B (EC 1.9.3.1)protein7748% helix, 1% strandQ01519
kCytochrome C oxidase subunit 6A, mitochondrial (EC 1.9.3.1)protein11850% helix, 1% strandP32799
lCOX26protein4576% helix, 0% strandQ2V2P9
mRCF2protein9977% helix, 0% strandP53721

Ligands and binding sites

  • PEF · Di-palmitoyl-3-sn-phosphatidylethanolamine · ligand · 18 copies · chains A, C, D, E, N, I, G, H, J, L, O, P, S, T, R, U, a, c, b, e, i, l, k
  • CDL · Cardiolipin · ligand · 7 copies · chains A, C, I, J, D, G, H, L, N, T, U, R, S, O, P, e
  • PCF · 1,2-diacyl-sn-glycero-3-phoshocholine · ligand · 6 copies · chains C, G, H, A, E, I, N, R, S, e, L, P, T, a
  • HEM · Protoporphyrin IX containing Fe · ligand · 4 copies · chains C, N
  • HEC · Heme C · ligand · 2 copies · chains D, O
  • FES · Fe2/s2 (inorganic) cluster · ligand · 2 copies · chains E, P
  • HEA · Heme-A · ligand · 2 copies · chains a, b
  • CUA · Dinuclear copper ion · ligand · chains b
  • CU · Copper (II) ion · metal · chains a
  • MG · Magnesium ion · metal · chains a, b
  • ZN · Zinc ion · metal · chains d

Binding sites are the residues within 4.5 Å of a ligand's heavy atoms.

Pockets

20 pockets found on a 1 Å grid, 20 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
19920.910.93100HEA, MG
23770.850.9342HEM
38830.830.8581PEF
46510.830.8769HEM
53910.810.9045HEM

Interfaces

116 interfaces between chains.

  • a–b · 3655 Ų buried · 23 hydrogen bonds · protein-protein
  • a–c · 2497 Ų buried · 9 hydrogen bonds · protein-protein
  • C–G · 1956 Ų buried · 13 hydrogen bonds · protein-protein
  • N–R · 1954 Ų buried · 10 hydrogen bonds · protein-protein
  • c–k · 1851 Ų buried · 18 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 13 covalent, 6 cofactor, 6 disulfide (covalent ligand, heme c attachment, disulfide).

Compared structures

  • 6T15 · The III2-IV(5B)1 respiratory supercomplex from S. cerevisiae · the same entry in another collection · chain L against L, TM-score 1.00

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