X-group (possible homology)

389 EGF-like

Open in classification tree →

Ligands and drugs

19,258

Member domains

1,871

with ligand contacts (≤ 4 Å)

9.7% of members

1,396

with DrugDomain annotations

7.2% of members

993

with a DrugBank compound

5.2% 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.

152

Proteins with classified ligands

Superclasses bound (of 23)

4.9

Superclasses per 20 proteins

narrower than 85% 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
Organic oxygen compounds	96	29.8	3.22×	q < 0.0001
Homogeneous metal compounds	79	73.6	1.07×	q = 0.50
Homogeneous non-metal compounds	30	32.3	0.93×	q = 0.83
Organic acids and derivatives	4	23.2	0.17×	q < 0.0001
Nucleosides, nucleotides, and analogues	5	41.4	0.12×	q < 0.0001
Benzenoids	1	11.0	0.09×	q = 6.7e-4
Organoheterocyclic compounds	2	23.1	0.09×	q < 0.0001
Lipids and lipid-like molecules	0	16.7	0	q < 0.0001
Organic nitrogen compounds	4	4.8	0.84×	not tested
Organosulfur compounds	1	3.1	0.32×	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
DB00141	NAG	N-Acetylglucosamine	476
DB04473	FUC	alpha-L-fucose	57
DB02379	BGC	Beta-D-Glucose	44
DB01593	—	—	36
DB14487	—	—	36
DB09130	—	—	28
DB08818	—	—	24
DB14533	—	—	24
DB12010	—	Fostamatinib	16
DB11973	—	—	10
DB12843	—	—	9
DB00364	—	—	8
DB03721	—	N-acetyl-alpha-neuraminic acid	8
DB04454	—	Alpha-Aminobutyric Acid	8
DB09332	—	—	8
DB01050	—	—	7
DB09213	—	Dexibuprofen	7
DB02709	—	Resveratrol	6
DB03017	—	Lauric acid	6
DB12267	—	Brigatinib	6

Most frequently bound compounds

PDB ligand	Name	Domains in contact
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	706
CAmetal	CALCIUM ION	603
CL	CHLORIDE ION	76
FUC	alpha-L-fucopyranose	67
BGC	beta-D-glucopyranose	58
ZNmetal	ZINC ION	23
NAmetal	SODIUM ION	21
MNmetal	MANGANESE (II) ION	17
GLC	alpha-D-glucopyranose	12
CDmetal	CADMIUM ION	10
MGmetal	MAGNESIUM ION	9
NGA	2-acetamido-2-deoxy-beta-D-galactopyranose	8
COmetal	COBALT (II) ION	7
CUmetal	COPPER (II) ION	7
AKG	2-OXOGLUTARIC ACID	6
IOD	IODIDE ION	6
MRD	(4R)-2-METHYLPENTANE-2,4-DIOL	6
Kmetal	POTASSIUM ION	5
BAmetal	BARIUM ION	4
FEmetal	FE (III) ION	4