X-group (possible homology)

383 Defensin-like

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Ligands and drugs

824

Member domains

141

with ligand contacts (≤ 4 Å)

17.1% of members

141

with DrugDomain annotations

17.1% of members

105

with a DrugBank compound

12.7% 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	5.3	0.56×	q = 0.30
Organosulfur compounds	1	0.2	4.48×	not tested
Homogeneous non-metal compounds	7	2.3	3.00×	not tested
Organic acids and derivatives	4	1.7	2.38×	not tested
Lipids and lipid-like molecules	2	1.2	1.66×	not tested
Organic oxygen compounds	3	2.2	1.39×	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
DB08367	PA6	(R)-2-(FORMYLOXY)-3-(PHOSPHONOOXY)PROPYL PENTANOATE	4
DB00145	GLY	Glycine	2
DB00142	—	Glutamic acid	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CL	CHLORIDE ION	40
CAmetal	CALCIUM ION	9
PG0	2-(2-METHOXYETHOXY)ETHANOL	7
ZNmetal	ZINC ION	7
PA6	(R)-2-(FORMYLOXY)-3-(PHOSPHONOOXY)PROPYL PENTANOATE	4
BR	BROMIDE ION	3
SCN	THIOCYANATE ION	3
GLY	GLYCINE	2
P6G	HEXAETHYLENE GLYCOL	2
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
TFA	trifluoroacetic acid	2
AZI	AZIDE ION	1
Kmetal	POTASSIUM ION	1