X-group (possible homology)

235 Lysozyme-like

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Ligands and drugs

4,713

Member domains

2,106

with ligand contacts (≤ 4 Å)

44.7% of members

2,118

with DrugDomain annotations

44.9% of members

1,363

with a DrugBank compound

28.9% 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.

104

Proteins with classified ligands

Superclasses bound (of 23)

11.0

Superclasses per 20 proteins

broader than 98% 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
Benzenoids	13	7.5	1.73×	q = 0.09
Organic oxygen compounds	33	20.4	1.62×	q = 8.5e-3
Homogeneous non-metal compounds	32	22.1	1.45×	q = 0.04
Organic acids and derivatives	21	15.9	1.32×	q = 0.23
Lipids and lipid-like molecules	15	11.4	1.31×	q = 0.34
Organoheterocyclic compounds	20	15.8	1.27×	q = 0.34
Homogeneous metal compounds	38	50.3	0.76×	q = 0.03
Nucleosides, nucleotides, and analogues	1	28.4	0.04×	q < 0.0001
Organic salts	2	0.1	19×	not tested
Organohalogen compounds	2	0.3	6.85×	not tested
Organometallic compounds	1	0.2	6.85×	not tested
Alkaloids and derivatives	2	0.4	5.71×	not tested
Organosulfur compounds	6	2.1	2.84×	not tested
Organic nitrogen compounds	7	3.3	2.14×	not tested
Phenylpropanoids and polyketides	4	2.1	1.88×	not tested
Hydrocarbons	1	0.7	1.40×	not tested
Mixed metal/non-metal compounds	2	2.2	0.93×	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
DB03345	BME	Mercaptoethanol	312
DB02486	HED	2-Hydroxyethyl Disulfide	164
DB00515	CPT	Cisplatin	19
DB00141	NAG	N-Acetylglucosamine	18
DB08217	MTN	S-[(1-Hydroxy-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrol-3-yl)methyl] methanesulfonothioate	18
DB02210	HEZ	Hexane-1,6-Diol	15
DB01409	0HK	Tiotropium	10
DB02595	BLG	(2R,3S,5S)-2-(Hydroxymethyl)-5-[(2-sulfoethyl)carbamoyl]-3-pyrrolidiniumyl 2-acetamido-2-deoxy-4-O-sulfo-beta-D-glucopyranoside	10
DB03740	NDG	N-acetyl-alpha-D-glucosamine	10
DB00536	GAI	Guanidine	8
DB11558	MBN	Toluene	7
DB11588	CMO	Carbon monoxide	7
DB02379	BGC	Beta-D-Glucose	6
DB02810	MHA	N-(2-Acetamido)Iminodiacetic Acid	6
DB03904	URE	Urea	6
DB04349	PGO	(S)-propane-1,2-diol	6
DB00139	SIN	Succinic acid	5
DB02042	1PG	2-(2-{2-[2-(2-Methoxy-Ethoxy)-Ethoxy]-Ethoxy}-Ethoxy)-Ethanol	5
DB03255	IPH	Phenol	5
DB03556	PE5	2-(2-{2-[2-(2-{2-[2-(2-Ethoxy-Ethoxy)-Ethoxy]-Ethoxy}-Ethoxy)-Ethoxy]-Ethoxy}-Ethoxy)-Ethanol, Polyethyleneglycol Peg400	5

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CL	CHLORIDE ION	1,088
NAmetal	SODIUM ION	627
BME	BETA-MERCAPTOETHANOL	298
HED	2-HYDROXYETHYL DISULFIDE	164
CAmetal	CALCIUM ION	98
Kmetal	POTASSIUM ION	38
ZNmetal	ZINC ION	34
PTmetal	PLATINUM (II) ION	33
IOD	IODIDE ION	23
CPT	Cisplatin	19
RUmetal	RUTHENIUM ION	19
MGmetal	MAGNESIUM ION	18
MTN	S-[(1-oxyl-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrol-3-yl)methyl] methanesulfonothioate	18
BR	BROMIDE ION	16
QPT	carboplatin	16
AUmetal	GOLD ION	15
COmetal	COBALT (II) ION	15
HEZ	HEXANE-1,6-DIOL	15
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	15
DO3	10-((2R)-2-HYDROXYPROPYL)-1,4,7,10-TETRAAZACYCLODODECANE 1,4,7-TRIACETIC ACID	14