X-group (possible homology)

4335 Nqo1 FMN-binding domain-like

Open in classification tree →

Ligands and drugs

734

Member domains

478

with ligand contacts (≤ 4 Å)

65.1% of members

318

with DrugDomain annotations

43.3% of members

308

with a DrugBank compound

42.0% 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)

4.0

Superclasses per 20 proteins

narrower than 90% 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
Nucleosides, nucleotides, and analogues	30	8.7	3.44×	q < 0.0001
Organic oxygen compounds	1	6.3	0.16×	q = 0.02
Homogeneous non-metal compounds	1	6.8	0.15×	q = 0.02
Homogeneous metal compounds	2	15.5	0.13×	q < 0.0001
Organoheterocyclic compounds	2	4.9	0.41×	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
DB03247	FMN	Flavin mononucleotide	304
DB00157	NAI	NADH	94
DB14128	NAD	Nadide	15
DB03434	MPO	3-(N-morpholino)propanesulfonic acid	8
DB00140	RBF	Riboflavin	2
DB03461	NAP	Nicotinamide adenine dinucleotide phosphate	2
DB04447	DTT	1,4-Dithiothreitol	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
SF4	IRON/SULFUR CLUSTER	455
FMN	FLAVIN MONONUCLEOTIDE	448
NAI	1,4-DIHYDRONICOTINAMIDE ADENINE DINUCLEOTIDE	106
FES	FE2/S2 (INORGANIC) CLUSTER	65
NAmetal	SODIUM ION	59
NAD	NICOTINAMIDE-ADENINE-DINUCLEOTIDE	30
FNR	1-DEOXY-1-(7,8-DIMETHYL-2,4-DIOXO-3,4-DIHYDRO-2H-BENZO[G]PTERIDIN-1-ID-10(5H)-YL)-5-O-PHOSPHONATO-D-RIBITOL	22
CL	CHLORIDE ION	20
MPO	3[N-MORPHOLINO]PROPANE SULFONIC ACID	16
A3D	3-ACETYLPYRIDINE ADENINE DINUCLEOTIDE	4
AP0	ACETYL PYRIDINE ADENINE DINUCLEOTIDE, REDUCED	4
MGmetal	MAGNESIUM ION	4
APR	ADENOSINE-5-DIPHOSPHORIBOSE	2
L3W	[[(2~{R},3~{S},4~{R},5~{R})-5-(6-aminopurin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl] [(2~{R},3~{S},4~{R},5~{R})-5-[[(1~{E},3~{Z})-5-azanyl-4-oxidanyl-5-oxidanylidene-penta-1,3-dienyl]-methanoyl-amino]-3,4-bis(oxidanyl)oxolan-2-yl]methyl hydrogen phosphate	2
NAP	NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE	2
DTT	2,3-DIHYDROXY-1,4-DITHIOBUTANE	1
Kmetal	POTASSIUM ION	1