X-group (possible homology)

5013 cytochrome c1 transmembrane anchor

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Ligands and drugs

335

Member domains

212

with ligand contacts (≤ 4 Å)

63.3% of members

134

with DrugDomain annotations

40.0% of members

123

with a DrugBank compound

36.7% 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	0	5.8	0	q = 1.4e-3
Lipids and lipid-like molecules	12	1.3	9.11×	not tested
Homogeneous non-metal compounds	1	2.6	0.39×	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	111
DB04327	PEE	Phosphatidylethanolamine	38
DB01728	PEF	1,2-dihexadecanoyl-sn-glycero-3-phosphoethanolamine	13
DB09114	PCF	Colfosceril palmitate	8
DB09270	U10	Ubidecarenone	4
DB02144	PIE	1,2-diacyl-sn-glycero-3-phosphoinositol	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CDL	CARDIOLIPIN	181
PEE	1,2-dioleoyl-sn-glycero-3-phosphoethanolamine	56
3PE	1,2-Distearoyl-sn-glycerophosphoethanolamine	45
PC1	1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE	41
PTY	PHOSPHATIDYLETHANOLAMINE	37
PEF	DI-PALMITOYL-3-SN-PHOSPHATIDYLETHANOLAMINE	18
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 undecanoate	15
6PH	(1R)-2-(phosphonooxy)-1-[(tridecanoyloxy)methyl]ethyl pentadecanoate	11
3PH	1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE	10
7PH	(1R)-2-(dodecanoyloxy)-1-[(phosphonooxy)methyl]ethyl tetradecanoate	10
6PE	1,2-DIHEXANOYL-SN-GLYCERO-3-PHOSPHOETHANOLAMINE	7
PX4	1,2-DIMYRISTOYL-SN-GLYCERO-3-PHOSPHOCHOLINE	7
UNL	Unknown ligand	7
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-TRIOL	6
PGT	(1S)-2-{[{[(2R)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL STEARATE	4
PLC	DIUNDECYL PHOSPHATIDYL CHOLINE	4
U10	UBIQUINONE-10	4
AZI	AZIDE ION	3
CN6	(2R,5R,11S,14R)-2-(butanoyloxy)-5,8,11-trihydroxy-5,11-dioxido-16-oxo-14-[(propanoyloxy)methyl]-4,6,10,12,15-pentaoxa-5,11-diphosphanonadec-1-yl undecanoate	2
PC7	(7S)-4-HYDROXY-N,N,N-TRIMETHYL-9-OXO-7-[(PALMITOYLOXY)METHYL]-3,5,8-TRIOXA-4-PHOSPHAHEXACOSAN-1-AMINIUM 4-OXIDE	2