X-group (possible homology)

5039 Cytochrome c oxidase subunit III-like

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Ligands and drugs

523

Member domains

267

with ligand contacts (≤ 4 Å)

51.1% of members

189

with DrugDomain annotations

36.1% of members

166

with a DrugBank compound

31.7% 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
Homogeneous metal compounds	1	6.3	0.16×	q = 7.6e-3
Hydrocarbons	2	0.1	22×	not tested
Lipids and lipid-like molecules	12	1.4	8.41×	not tested
Organic oxygen compounds	2	2.6	0.78×	not tested
Homogeneous non-metal compounds	2	2.8	0.72×	not tested
Organic acids and derivatives	1	2.0	0.50×	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	148
DB02659	CHD	Cholic Acid	127
DB01728	PEF	1,2-dihexadecanoyl-sn-glycero-3-phosphoethanolamine	9
DB04327	PEE	Phosphatidylethanolamine	3
DB09114	PCF	Colfosceril palmitate	2
DB14522	OH	Hydroxide ion	2
DB02043	LHG	1,2-Dipalmitoyl-Phosphatidyl-Glycerole	1
DB03279	LMU	Dodecyl-Alpha-D-Maltoside	1
DB04464	—	N-Formylmethionine	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CDL	CARDIOLIPIN	203
PGV	(1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE	165
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
DMU	DECYL-BETA-D-MALTOPYRANOSIDE	128
UNX	UNKNOWN ATOM OR ION	70
3PE	1,2-Distearoyl-sn-glycerophosphoethanolamine	39
NAmetal	SODIUM ION	31
LFA	EICOSANE	22
PC1	1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE	21
9Y0	(2R)-3-(((2-aminoethoxy)(hydroxy)phosphoryl)oxy)-2-(palmitoyloxy)propyl (E)-octadec-9-enoate	18
PTY	PHOSPHATIDYLETHANOLAMINE	13
PEF	DI-PALMITOYL-3-SN-PHOSPHATIDYLETHANOLAMINE	10
7PH	(1R)-2-(dodecanoyloxy)-1-[(phosphonooxy)methyl]ethyl tetradecanoate	8
PEE	1,2-dioleoyl-sn-glycero-3-phosphoethanolamine	8
TRD	TRIDECANE	8
ZNmetal	ZINC ION	8
XE	XENON	6
PCF	1,2-DIACYL-SN-GLYCERO-3-PHOSHOCHOLINE	5
CDmetal	CADMIUM ION	4