X-group (possible homology)

5089 Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains

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Ligands and drugs

688

Member domains

156

with ligand contacts (≤ 4 Å)

22.7% of members

with DrugDomain annotations

14.2% of members

with a DrugBank compound

13.5% 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 metal compounds	3	6.8	0.44×	q = 0.09
Organohalogen compounds	1	0.0	25×	not tested
Organic oxygen compounds	9	2.8	3.27×	not tested
Homogeneous non-metal compounds	3	3.0	1.01×	not tested
Lipids and lipid-like molecules	1	1.5	0.65×	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	74
DB01593	—	—	2
DB03401	I3P	1D-myo-inositol 1,4,5-trisphosphate	2
DB09130	—	—	2
DB14487	—	—	2
DB03283	FUL	beta-L-fucose	1
DB03429	CDL	Tetrastearoyl cardiolipin	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	68
CAmetal	CALCIUM ION	62
NAmetal	SODIUM ION	5
MAN	alpha-D-mannopyranose	4
CL	CHLORIDE ION	3
ZNmetal	ZINC ION	3
BMA	beta-D-mannopyranose	2
I3P	D-MYO-INOSITOL-1,4,5-TRIPHOSPHATE	2
MGmetal	MAGNESIUM ION	2
CDL	CARDIOLIPIN	1
CFH	1,1,1,3,3,3-hexafluoropropan-2-ol	1
CUmetal	COPPER (II) ION	1
FUL	beta-L-fucopyranose	1
IOD	IODIDE ION	1
NImetal	NICKEL (II) ION	1