X-group (possible homology)

218 Enolase-N/ribosomal protein

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Ligands and drugs

8,987

Member domains

2,719

with ligand contacts (≤ 4 Å)

30.3% of members

1,942

with DrugDomain annotations

21.6% of members

794

with a DrugBank compound

8.8% 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.

162

Proteins with classified ligands

Superclasses bound (of 23)

6.0

Superclasses per 20 proteins

narrower than 74% 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 acids and derivatives	46	24.7	1.86×	q < 0.0001
Organic oxygen compounds	48	31.8	1.51×	q = 4.7e-3
Homogeneous metal compounds	103	78.4	1.31×	q = 3.3e-4
Organic nitrogen compounds	6	5.1	1.18×	q = 0.72
Homogeneous non-metal compounds	36	34.4	1.05×	q = 0.84
Organoheterocyclic compounds	6	24.6	0.24×	q < 0.0001
Benzenoids	2	11.7	0.17×	q = 2.7e-3
Lipids and lipid-like molecules	1	17.8	0.06×	q < 0.0001
Nucleosides, nucleotides, and analogues	2	44.2	0.04×	q < 0.0001
Mixed metal/non-metal compounds	2	3.4	0.60×	not tested
Phenylpropanoids and polyketides	1	3.3	0.30×	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
DB01709	2PG	2-phospho-D-glyceric acid	56
DB00160	ALA	Alanine	39
DB01819	PEP	Phosphoenolpyruvate	38
DB13180	GCO	Gluconic Acid	23
DB01786	DAL	D-Alanine	20
DB09459	TLA	L-tartaric acid	20
DB03489	KDG	2-Keto-3-Deoxygluconate	16
DB14756	SRT	meso-Tartaric acid	16
DB00161	VAL	Valine	15
DB00135	TYR	Tyrosine	14
DB00976	TEL	Telithromycin	14
DB03237	GLR	2,3-Dihydroxy-5-Oxo-Hexanedioate	14
DB00142	GLU	Glutamic acid	13
DB01694	TAR	D-tartaric acid	13
DB03645	PAH	Phosphonoacetohydroxamic Acid	12
DB00127	SPM	Spermine	11
DB00199	ERY	Erythromycin	11
DB03603	GKR	Glucaric acid	10
DB00167	ILE	Isoleucine	8
DB01646	AME	N-Acetylmethionine	8

Most frequently bound compounds

PDB ligand	Name	Domains in contact
MGmetal	MAGNESIUM ION	1,772
CL	CHLORIDE ION	212
OHX	osmium (III) hexammine	74
NAmetal	SODIUM ION	72
Kmetal	POTASSIUM ION	64
2PG	2-PHOSPHOGLYCERIC ACID	46
SPD	SPERMIDINE	46
PEP	PHOSPHOENOLPYRUVATE	39
TYR	TYROSINE	32
ALA	ALANINE	31
SRmetal	STRONTIUM ION	30
GCO	D-gluconic acid	23
CS2	D-MANNONIC ACID	22
IOD	IODIDE ION	22
PUT	1,4-DIAMINOBUTANE	22
TLA	L(+)-TARTARIC ACID	20
DAL	D-ALANINE	18
SPM	SPERMINE	18
0YR	(2R,3R,4R)-N,2,3,4,5-pentakis(oxidanyl)pentanamide	16
KDG	2-KETO-3-DEOXYGLUCONATE	16