X-group (possible homology)

5003 Mitochondrial cytochrome c oxidase subunit IV

Ligands and drugs

281
Member domains
193
with ligand contacts (≤ 4 Å)
68.7% of members
141
with DrugDomain annotations
50.2% of members
17
with a DrugBank compound
6.0% of members

Aggregated over all current member domains of this group. Drug annotations come from DrugDomain; buffers and crystallization additives are excluded from the tables below.

Chemical profile

ClassyFire chemical superclasses of the ligands bound by this X-group's proteins, from DrugDomain annotations.

4
Proteins with classified ligands
3
Superclasses bound (of 23)
—
Superclasses per 20 proteins
fewer than 20 proteins: too few to compare at equal depth

The raw number of superclasses rises with the number of proteins sampled; the per-20 value compares X-groups at equal depth.

SuperclassProteinsExpected
0.25×observed / expected4×
RatioSignificance
Lipids and lipid-like molecules40.49.11×not tested
Organic oxygen compounds10.81.27×not tested
Homogeneous metal compounds11.90.52×not tested
enriched (q < 0.05)depleted (q < 0.05)not significantnot tested (expected < 5)

Unit: a protein (UniProt accession) with a ligand-binding domain in this X-group, counted once per superclass. Expected counts use each superclass's frequency across all ligand-binding X-groups; significance is Fisher's exact test with Benjamini–Hochberg correction. Buffers and crystallization additives are excluded. ECOD v295.2; the method follows the ECOD 2027 update, whose published figures used a slightly different artifact filter.

DrugBank compounds

DrugBankPDB ligandNameDomains
DB03429CDLTetrastearoyl cardiolipin11
DB09114PCFColfosceril palmitate10
DB01728PEF1,2-dihexadecanoyl-sn-glycero-3-phosphoethanolamine9
DB02659CHDCholic Acid2
DB04464—N-Formylmethionine1

Most frequently bound compounds

PDB ligandNameDomains in contact
DMUDECYL-BETA-D-MALTOPYRANOSIDE148
PGV(1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE131
TGLTRISTEAROYLGLYCEROL123
3PE1,2-Distearoyl-sn-glycerophosphoethanolamine13
CDLCARDIOLIPIN13
PCF1,2-DIACYL-SN-GLYCERO-3-PHOSHOCHOLINE13
PEFDI-PALMITOYL-3-SN-PHOSPHATIDYLETHANOLAMINE12
PTYPHOSPHATIDYLETHANOLAMINE11
PC11,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE5
CN3(2R,5S,11R,14R)-5,8,11-trihydroxy-2-(nonanoyloxy)-5,11-dioxido-16-oxo-14-[(propanoyloxy)methyl]-4,6,10,12,15-pentaoxa-5,11-diphosphanonadec-1-yl undecanoate4
CQX(2S,3S,4S,5S,6R)-2-(2-decoxyethoxy)-6-(hydroxymethyl)oxane-3,4,5-triol2
PEE1,2-dioleoyl-sn-glycero-3-phosphoethanolamine2
PLX(9R,11S)-9-({[(1S)-1-HYDROXYHEXADECYL]OXY}METHYL)-2,2-DIMETHYL-5,7,10-TRIOXA-2LAMBDA~5~-AZA-6LAMBDA~5~-PHOSPHAOCTACOSANE-6,6,11-TRIOL2
CHDCHOLIC ACID1
PGT(1S)-2-{[{[(2R)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL STEARATE1
UNLUnknown ligand1
ZNmetalZINC ION1