X-group (possible homology)

5100 iron-sulfur center-binding helical hairpin

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Ligands and drugs

461

Member domains

445

with ligand contacts (≤ 4 Å)

96.5% of members

178

with DrugDomain annotations

38.6% of members

with a DrugBank compound

0.9% 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.

Proteins with classified ligands

Superclasses bound (of 23)

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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	0.25×observed / expected4×	Ratio	Significance
Homogeneous metal compounds	5	2.4		2.07×	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

No DrugBank compounds are annotated on this group's domains.

Most frequently bound compounds

PDB ligand	Name	Domains in contact
SF4	IRON/SULFUR CLUSTER	445
Kmetal	POTASSIUM ION	94
MGmetal	MAGNESIUM ION	57
FES	FE2/S2 (INORGANIC) CLUSTER	7
NAmetal	SODIUM ION	4
CL	CHLORIDE ION	2