X-group (possible homology)

7579 alpha/beta-Hydrolases

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Ligands and drugs

14,574

Member domains

5,070

with ligand contacts (≤ 4 Å)

34.8% of members

4,453

with DrugDomain annotations

30.6% of members

3,062

with a DrugBank compound

21.0% 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.

445

Proteins with classified ligands

Superclasses bound (of 23)

10.2

Superclasses per 20 proteins

broader than 97% 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
Phenylpropanoids and polyketides	28	9.1	3.07×	q < 0.0001
Benzenoids	93	32.1	2.90×	q < 0.0001
Organosulfur compounds	18	9.0	1.99×	q = 0.01
Homogeneous non-metal compounds	164	94.4	1.74×	q < 0.0001
Organic acids and derivatives	113	67.9	1.66×	q < 0.0001
Organic nitrogen compounds	22	14.0	1.57×	q = 0.06
Organic oxygen compounds	129	87.4	1.48×	q < 0.0001
Lipids and lipid-like molecules	58	48.9	1.19×	q = 0.23
Organoheterocyclic compounds	60	67.5	0.89×	q = 0.43
Homogeneous metal compounds	164	215.4	0.76×	q < 0.0001
Mixed metal/non-metal compounds	1	9.2	0.11×	q = 4.6e-3
Nucleosides, nucleotides, and analogues	7	121.3	0.06×	q < 0.0001
Organophosphorus compounds	7	0.2	47×	not tested
Organometallic compounds	4	0.6	6.40×	not tested
Organohalogen compounds	6	1.3	4.80×	not tested
Organic 1,3-dipolar compounds	1	0.4	2.73×	not tested
Alkaloids and derivatives	4	1.5	2.67×	not tested
Organic salts	1	0.5	2.19×	not tested
Hydrocarbons	3	3.1	0.98×	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	1,034
DB03721	SIA	N-acetyl-alpha-neuraminic acid	61
DB02811	DEP	Diethyl phosphonate	50
DB03793	BEZ	Benzoic acid	33
DB01992	COA	Coenzyme A	31
DB04417	NPO	P-Nitrophenol	25
DB03313	CSC	Cephalosporin C	24
DB09459	TLA	L-tartaric acid	22
DB07767	FER	Ferulic acid	20
DB00145	GLY	Glycine	19
DB03297	PMS	Benzylsulfonic acid	19
DB03796	PLM	Palmitic Acid	19
DB14756	SRT	meso-Tartaric acid	17
DB03345	BME	Mercaptoethanol	16
DB00172	PRO	Proline	15
DB03085	GOA	Glycolic acid	15
DB03568	BUA	Butyric Acid	14
DB07821	GD7	(1R)-1,2,2-trimethylpropyl (R)-methylphosphinate	14
DB02175	MLA	Malonic acid	13
DB02226	TZ4	3,8-Diamino-6-Phenyl-5-[6-[1-[2-[(1,2,3,4-Tetrahydro-9-Acridinyl)Amino]Ethyl]-1h-1,2,3-Triazol-4-Yl]Hexyl]-Phenanthridinium	13

Most frequently bound compounds

PDB ligand	Name	Domains in contact
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	1,006
CL	CHLORIDE ION	865
CAmetal	CALCIUM ION	433
NAmetal	SODIUM ION	244
MGmetal	MAGNESIUM ION	141
ZNmetal	ZINC ION	118
P6G	HEXAETHYLENE GLYCOL	114
Kmetal	POTASSIUM ION	82
SIA	N-acetyl-alpha-neuraminic acid	68
DEP	DIETHYL PHOSPHONATE	52
BEZ	BENZOIC ACID	40
PG0	2-(2-METHOXYETHOXY)ETHANOL	36
HI6	4-(AMINOCARBONYL)-1-[({2-[(E)-(HYDROXYIMINO)METHYL]PYRIDINIUM-1-YL}METHOXY)METHYL]PYRIDINIUM	34
PMS	phenylmethanesulfonic acid	33
TLA	L(+)-TARTARIC ACID	32
6NA	HEXANOIC ACID	31
COA	COENZYME A	31
TMO	trimethylamine oxide	31
CDmetal	CADMIUM ION	30
MRD	(4R)-2-METHYLPENTANE-2,4-DIOL	30