X-group (possible homology)

5038 Cytochrome c oxidase subunit I-like

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Ligands and drugs

888

Member domains

548

with ligand contacts (≤ 4 Å)

61.7% of members

415

with DrugDomain annotations

46.7% of members

354

with a DrugBank compound

39.9% 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)

9.0

Superclasses per 20 proteins

broader than 81% of the 256 X-groups with enough proteins to compare (median 7.6)

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
Organoheterocyclic compounds	13	5.0	2.60×	q = 1.6e-3
Homogeneous metal compounds	31	16.0	1.94×	q < 0.0001
Homogeneous non-metal compounds	9	7.0	1.28×	q = 0.47
Organic acids and derivatives	6	5.0	1.19×	q = 0.70
Organic oxygen compounds	6	6.5	0.93×	q = 1.00
Nucleosides, nucleotides, and analogues	0	9.0	0	q = 1.3e-4
Hydrocarbons	4	0.2	18×	not tested
Lipids and lipid-like molecules	25	3.6	6.90×	not tested
Organic nitrogen compounds	2	1.0	1.93×	not tested
Organosulfur compounds	1	0.7	1.49×	not tested
Benzenoids	1	2.4	0.42×	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
DB03429	CDL	Tetrastearoyl cardiolipin	136
DB02659	CHD	Cholic Acid	127
DB18267	HEM	Ferroheme	87
DB00143	GSH	Glutathione	42
DB11588	CMO	Carbon monoxide	32
DB03796	PLM	Palmitic Acid	31
DB03317	HEC	Ferroheme C	23
DB14522	OH	Hydroxide ion	16
DB11091	PEO	Hydrogen peroxide	14
DB01728	PEF	1,2-dihexadecanoyl-sn-glycero-3-phosphoethanolamine	11
DB09114	PCF	Colfosceril palmitate	10
DB09140	OXY	Oxygen	7
DB16346	QY1	Veliflapon	7
DB04257	PAM	Palmitoleic Acid	6
DB16739	QY7	MK-886	6
DB02451	BNG	B-nonylglucoside	4
DB03003	GTS	Glutathione sulfonic acid	4
DB04327	PEE	Phosphatidylethanolamine	3
DB07918	HQO	2-heptyl-4-hydroxyquinoline N-oxide	3
DB03279	LMU	Dodecyl-Alpha-D-Maltoside	2

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CUmetal	COPPER (II) ION	375
HEA	HEME-A	323
MGmetal	MAGNESIUM ION	267
CDL	CARDIOLIPIN	214
NAmetal	SODIUM ION	176
PGV	(1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE	167
DMU	DECYL-BETA-D-MALTOPYRANOSIDE	164
PEK	(1S)-2-{[(2-AMINOETHOXY)(HYDROXY)PHOSPHORYL]OXY}-1-[(STEAROYLOXY)METHYL]ETHYL (5E,8E,11E,14E)-ICOSA-5,8,11,14-TETRAENOATE	161
CHD	CHOLIC ACID	150
CAmetal	CALCIUM ION	133
PSC	(7R,17E,20E)-4-HYDROXY-N,N,N-TRIMETHYL-9-OXO-7-[(PALMITOYLOXY)METHYL]-3,5,8-TRIOXA-4-PHOSPHAHEXACOSA-17,20-DIEN-1-AMINIUM 4-OXIDE	131
TGL	TRISTEAROYLGLYCEROL	131
HEM	PROTOPORPHYRIN IX CONTAINING FE	110
PER	PEROXIDE ION	58
PLM	PALMITIC ACID	58
HAS	HEME-AS	54
3PE	1,2-Distearoyl-sn-glycerophosphoethanolamine	51
GSH	Glutathione	42
FEmetal	FE (III) ION	35
PC1	1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE	33