X-group (possible homology)

3843 NADH-quinone oxidoreductase subunit K

Open in classification tree →

Ligands and drugs

1,449

Member domains

156

with ligand contacts (≤ 4 Å)

10.8% of members

102

with DrugDomain annotations

7.0% of members

with a DrugBank compound

3.2% 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	5.8	0.17×	q = 0.01
Hydrocarbons	2	0.1	24×	not tested
Lipids and lipid-like molecules	9	1.3	6.83×	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	47

Most frequently bound compounds

PDB ligand	Name	Domains in contact
3PE	1,2-Distearoyl-sn-glycerophosphoethanolamine	74
CDL	CARDIOLIPIN	60
T7X	Phosphatidylinositol	5
DU0	2-[2-[(1~{S},2~{S},4~{S},5'~{R},6~{R},7~{S},8~{R},9~{S},12~{S},13~{R},16~{S})-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.0^{2,9}.0^{4,8}.0^{13,18}]icos-18-ene-6,2'-oxane]-16-yl]oxyethyl]propane-1,3-diol	3
AJP	Digitonin	2
Kmetal	POTASSIUM ION	2
LFA	EICOSANE	2
PGT	(1S)-2-{[{[(2R)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL STEARATE	2
Q7G	2-{[(4-O-alpha-D-glucopyranosyl-alpha-D-glucopyranosyl)oxy]methyl}-4-{[(3beta,9beta,14beta,17beta,25R)-spirost-5-en-3-yl]oxy}butyl 4-O-alpha-D-glucopyranosyl-alpha-D-glucopyranoside	2
3PH	1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE	1
BCR	BETA-CAROTENE	1
FME	N-FORMYLMETHIONINE	1
LMG	1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE	1
PC1	1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE	1
PEE	1,2-dioleoyl-sn-glycero-3-phosphoethanolamine	1
SQD	1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL	1