X-group (possible homology)

650 Chaperone J-domain

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Ligands and drugs

2,875

Member domains

with ligand contacts (≤ 4 Å)

0.8% of members

with DrugDomain annotations

1.0% of members

with a DrugBank compound

0.7% 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
Lipids and lipid-like molecules	2	0.6	3.64×	not tested
Organoheterocyclic compounds	1	0.8	1.32×	not tested
Homogeneous non-metal compounds	1	1.1	0.94×	not tested
Nucleosides, nucleotides, and analogues	1	1.4	0.73×	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
DB04557	ACD	Arachidonic Acid	12
DB03796	PLM	Palmitic Acid	2
DB00171	ATP	ATP	1
DB12010	—	Fostamatinib	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
ACD	ARACHIDONIC ACID	9
1PS	3-PYRIDINIUM-1-YLPROPANE-1-SULFONATE	1
CL	CHLORIDE ION	1
PLM	PALMITIC ACID	1