X-group (possible homology)

1122 Mitochondrial complex I, B9 subunit

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Ligands and drugs

232

Member domains

207

with ligand contacts (≤ 4 Å)

89.2% of members

119

with DrugDomain annotations

51.3% of members

with a DrugBank compound

23.7% 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)

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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	0.25×observed / expected4×	Ratio	Significance
Lipids and lipid-like molecules	6	0.7		9.11×	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
DB04327	PEE	Phosphatidylethanolamine	55

Most frequently bound compounds

PDB ligand	Name	Domains in contact
3PE	1,2-Distearoyl-sn-glycerophosphoethanolamine	130
PC1	1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE	72
PEE	1,2-dioleoyl-sn-glycero-3-phosphoethanolamine	69
PLC	DIUNDECYL PHOSPHATIDYL CHOLINE	14
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	7
CDL	CARDIOLIPIN	1