X-group (possible homology)

225 ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase-like

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Ligands and drugs

4,811

Member domains

1,580

with ligand contacts (≤ 4 Å)

32.8% of members

1,368

with DrugDomain annotations

28.4% of members

728

with a DrugBank compound

15.1% 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.

117

Proteins with classified ligands

Superclasses bound (of 23)

9.8

Superclasses per 20 proteins

broader than 92% of the 256 X-groups with enough proteins to compare (median 7.6)

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
Benzenoids	20	8.4	2.37×	q = 1.1e-3
Nucleosides, nucleotides, and analogues	71	31.9	2.23×	q < 0.0001
Organoheterocyclic compounds	29	17.8	1.63×	q = 0.01
Homogeneous metal compounds	77	56.6	1.36×	q = 5.5e-4
Homogeneous non-metal compounds	17	24.8	0.69×	q = 0.13
Organic oxygen compounds	11	23.0	0.48×	q = 7.3e-3
Organic acids and derivatives	7	17.9	0.39×	q = 6.3e-3
Lipids and lipid-like molecules	3	12.8	0.23×	q = 3.6e-3
Phenylpropanoids and polyketides	18	2.4	7.50×	not tested
Organosulfur compounds	9	2.4	3.79×	not tested
Alkaloids and derivatives	1	0.4	2.54×	not tested
Mixed metal/non-metal compounds	6	2.4	2.48×	not tested
Organic nitrogen compounds	1	3.7	0.27×	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
DB16833	ADP	Adenosine disphosphate	162
DB00171	ATP	ATP	67
DB03909	ACP	Adenosine-5'-[Beta, Gamma-Methylene]Triphosphate	50
DB01051	NOV	Novobiocin	21
DB03758	RDC	Radicicol	17
DB02424	GDM	Geldanamycin	10
DB02930	AGS	Adenosine 5'-[gamma-thio]triphosphate	9
DB17055	E0G	SNX-2112	7
DB03719	NEC	N-Ethyl-5'-Carboxamido Adenosine	6
DB09459	TLA	L-tartaric acid	6
DB12359	94M	BIIB021	6
DB08464	RDA	METHYL 3-CHLORO-2-{3-[(2,5-DIHYDROXY-4-METHOXYPHENYL)AMINO]-3-OXOPROPYL}-4,6-DIHYDROXYBENZOATE	5
DB08465	RDE	2-(3-AMINO-2,5,6-TRIMETHOXYPHENYL)ETHYL 5-CHLORO-2,4-DIHYDROXYBENZOATE	5
DB00380	CDX	Dexrazoxane	4
DB04444	ALF	Tetrafluoroaluminate Ion	4
DB07319	A56	6-(3-BROMO-2-NAPHTHYL)-1,3,5-TRIAZINE-2,4-DIAMINE	4
DB07594	CT5	CCT-018159	4
DB00173	ADE	Adenine	3
DB02527	CMP	Cyclic adenosine monophosphate	3
DB02596	APC	alpha,beta-Methyleneadenosine 5'-triphosphate	3

Most frequently bound compounds

PDB ligand	Name	Domains in contact
MGmetal	MAGNESIUM ION	462
ANP	PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER	189
ADP	ADENOSINE-5'-DIPHOSPHATE	186
CL	CHLORIDE ION	94
ATP	ADENOSINE-5'-TRIPHOSPHATE	86
ZNmetal	ZINC ION	75
Kmetal	POTASSIUM ION	71
ACP	PHOSPHOMETHYLPHOSPHONIC ACID ADENYLATE ESTER	56
AX7	1H-benzimidazol-2-amine	40
CAmetal	CALCIUM ION	26
NAmetal	SODIUM ION	26
NOV	NOVOBIOCIN	21
COmetal	COBALT (II) ION	18
RDC	RADICICOL	15
42C	N,N-dimethyl-7H-purin-6-amine	13
NImetal	NICKEL (II) ION	12
AGS	PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER	11
BEF	BERYLLIUM TRIFLUORIDE ION	11
19Y	6-ethyl-4-methoxy-2-(pyridin-3-ylsulfanyl)-7H-pyrrolo[2,3-d]pyrimidine-5-carbaldehyde	10
2GJ	5-[2,4-DIHYDROXY-5-(1-METHYLETHYL)PHENYL]-N-ETHYL-4-[4-(MORPHOLIN-4-YLMETHYL)PHENYL]ISOXAZOLE-3-CARBOXAMIDE	9