X-group (possible homology)

5004 Mitochondrial cytochrome c oxidase subunit VIa

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Ligands and drugs

255

Member domains

190

with ligand contacts (≤ 4 Å)

74.5% of members

140

with DrugDomain annotations

54.9% of members

135

with a DrugBank compound

52.9% 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.

Proteins with classified ligands

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.

Superclass	Proteins	Expected	Ratio	Significance
Hydrocarbons	1	0.0	29×	not tested
Lipids and lipid-like molecules	5	0.6	9.11×	not tested
Organic oxygen compounds	1	1.0	1.02×	not tested
Homogeneous metal compounds	1	2.4	0.41×	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

DrugBank	PDB ligand	Name	Domains
DB02659	CHD	Cholic Acid	125
DB03429	CDL	Tetrastearoyl cardiolipin	117
DB01728	PEF	1,2-dihexadecanoyl-sn-glycero-3-phosphoethanolamine	6
DB09114	PCF	Colfosceril palmitate	2
DB04327	PEE	Phosphatidylethanolamine	1
DB04464	—	N-Formylmethionine	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
PEK	(1S)-2-{[(2-AMINOETHOXY)(HYDROXY)PHOSPHORYL]OXY}-1-[(STEAROYLOXY)METHYL]ETHYL (5E,8E,11E,14E)-ICOSA-5,8,11,14-TETRAENOATE	159
CHD	CHOLIC ACID	146
CDL	CARDIOLIPIN	130
PGV	(1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE	98
DMU	DECYL-BETA-D-MALTOPYRANOSIDE	92
LFA	EICOSANE	22
3PE	1,2-Distearoyl-sn-glycerophosphoethanolamine	10
PC1	1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE	10
PEF	DI-PALMITOYL-3-SN-PHOSPHATIDYLETHANOLAMINE	7
PCF	1,2-DIACYL-SN-GLYCERO-3-PHOSHOCHOLINE	5
PEE	1,2-dioleoyl-sn-glycero-3-phosphoethanolamine	5
CQX	(2S,3S,4S,5S,6R)-2-(2-decoxyethoxy)-6-(hydroxymethyl)oxane-3,4,5-triol	2
UNL	Unknown ligand	2
ZNmetal	ZINC ION	2