X-group (possible homology)

54 EV matrix protein

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Ligands and drugs

122

Member domains

with ligand contacts (≤ 4 Å)

35.2% of members

with DrugDomain annotations

35.2% of members

with a DrugBank compound

23.8% 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.

Proteins with classified ligands

Superclasses bound (of 23)

—

Superclasses per 20 proteins

fewer than 20 proteins: too few to compare at equal depth

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
Homogeneous non-metal compounds	3	1.5	2.02×	not tested
Benzenoids	1	0.5	1.98×	not tested
Lipids and lipid-like molecules	1	0.8	1.30×	not tested
Nucleosides, nucleotides, and analogues	2	1.9	1.05×	not tested
Homogeneous metal compounds	2	3.4	0.59×	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
DB00936	SAL	Salicylic acid	4
DB03315	3GP	Guanosine 3'-monophosphate	3
DB03403	C5P	Cytidine-5'-Monophosphate	3
DB01972	5GP	Guanosine-5'-Monophosphate	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CL	CHLORIDE ION	9
CAmetal	CALCIUM ION	4
Kmetal	POTASSIUM ION	4
SAL	2-HYDROXYBENZOIC ACID	4
3GP	GUANOSINE-3'-MONOPHOSPHATE	3
C5P	CYTIDINE-5'-MONOPHOSPHATE	3
PIO	[(2R)-2-octanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tris(oxidanyl)-4,5-diphosphonooxy-cyclohexyl]oxy-phosphoryl]oxy-propyl] octanoate	2
5GP	GUANOSINE-5'-MONOPHOSPHATE	1