X-group (possible homology)

3703 HSP90 C-terminal a/b domain

Ligands and drugs

659
Member domains
26
with ligand contacts (≤ 4 Å)
3.9% of members
20
with DrugDomain annotations
3.0% of members
13
with a DrugBank compound
2.0% 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.

3
Proteins with classified ligands
2
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.

SuperclassProteinsExpected
0.25×observed / expected4×
RatioSignificance
Lipids and lipid-like molecules10.33.04×not tested
Homogeneous metal compounds21.51.38×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 ligandNameDomains in contact
COmetalCOBALT (II) ION5
05M2,3-dimethoxy-5-methyl-6-[10-(triphenyl-$l^{5}-phosphanyl)decyl]cyclohexa-2,5-diene-1,4-dione2
CDmetalCADMIUM ION2
CAmetalCALCIUM ION1
KUC[5-(4-fluoro-2H-isoindole-2-carbonyl)-2-hydroxyphenyl](5-fluoro-2H-isoindol-2-yl)methanone1
UJS(4-hydroxy-1,3-phenylene)bis[(2H-isoindol-2-yl)methanone]1
UJV[5-(4-fluoro-2H-isoindole-2-carbonyl)-2-hydroxyphenyl](5-methoxy-2H-isoindol-2-yl)methanone1