X-group (possible homology)

244 FAD-linked reductases, C-terminal domain-like

Open in classification tree →

Ligands and drugs

10,727

Member domains

4,641

with ligand contacts (≤ 4 Å)

43.3% of members

3,660

with DrugDomain annotations

34.1% of members

2,912

with a DrugBank compound

27.1% 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.

380

Proteins with classified ligands

Superclasses bound (of 23)

9.7

Superclasses per 20 proteins

broader than 91% 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	331	103.6	3.20×	q < 0.0001
Benzenoids	47	27.4	1.72×	q = 8.3e-4
Phenylpropanoids and polyketides	10	7.8	1.28×	q = 0.44
Organic nitrogen compounds	14	12.0	1.17×	q = 0.63
Organosulfur compounds	7	7.7	0.91×	q = 1.00
Homogeneous non-metal compounds	66	80.6	0.82×	q = 0.10
Organoheterocyclic compounds	43	57.7	0.75×	q = 0.06
Lipids and lipid-like molecules	28	41.7	0.67×	q = 0.04
Organic oxygen compounds	50	74.6	0.67×	q = 2.7e-3
Organic acids and derivatives	37	58.0	0.64×	q = 4.5e-3
Mixed metal/non-metal compounds	5	7.9	0.64×	q = 0.45
Homogeneous metal compounds	64	183.9	0.35×	q < 0.0001
Organic salts	12	0.4	31×	not tested
Hydrocarbons	3	2.6	1.15×	not tested
Organohalogen compounds	1	1.1	0.94×	not tested
Alkaloids and derivatives	1	1.3	0.78×	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
DB03147	FAD	Flavin adenine dinucleotide	2,575
DB00141	NAG	N-Acetylglucosamine	79
DB03435	UDP	Uridine-5'-Diphosphate	72
DB03501	GDU	Galactose-uridine-5'-diphosphate	66
DB01992	COA	Coenzyme A	44
DB02338	NDP	NADPH	39
DB14128	NAD	Nadide	39
DB00157	NAI	NADH	37
DB09140	OXY	Oxygen	29
DB04242	PHB	4-hydroxybenzoic acid	28
DB11588	CMO	Carbon monoxide	28
DB04166	BE2	Anthranilic acid	24
DB03793	BEZ	Benzoic acid	22
DB03345	BME	Mercaptoethanol	19
DB03193	STE	Stearic acid	17
DB00145	GLY	Glycine	13
DB03461	NAP	Nicotinamide adenine dinucleotide phosphate	13
DB00120	PHE	Phenylalanine	12
DB03247	FMN	Flavin mononucleotide	12
DB00184	NCT	Nicotine	11

Most frequently bound compounds

PDB ligand	Name	Domains in contact
FAD	FLAVIN-ADENINE DINUCLEOTIDE	2,856
SF4	IRON/SULFUR CLUSTER	824
MGmetal	MAGNESIUM ION	480
FCO	CARBONMONOXIDE-(DICYANO) IRON	471
NImetal	NICKEL (II) ION	422
FDA	DIHYDROFLAVINE-ADENINE DINUCLEOTIDE	189
CL	CHLORIDE ION	165
FE2metal	FE (II) ION	91
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	90
GLY	GLYCINE	75
CAmetal	CALCIUM ION	72
UDP	URIDINE-5'-DIPHOSPHATE	72
H2S	HYDROSULFURIC ACID	71
3NImetal	NICKEL (III) ION	68
GDU	GALACTOSE-URIDINE-5'-DIPHOSPHATE	66
NFU	formyl[bis(hydrocyanato-1kappaC)]ironnickel(Fe-Ni)	65
PEE	1,2-dioleoyl-sn-glycero-3-phosphoethanolamine	56
NAmetal	SODIUM ION	54
3PE	1,2-Distearoyl-sn-glycerophosphoethanolamine	52
SF3	FE4-S3 CLUSTER	51