X-group (possible homology)

7504 ITPase-like

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Ligands and drugs

1,237

Member domains

125

with ligand contacts (≤ 4 Å)

10.1% of members

with DrugDomain annotations

6.5% of members

with a DrugBank compound

3.9% 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)

—

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
Nucleosides, nucleotides, and analogues	7	2.7	2.57×	not tested
Homogeneous metal compounds	6	4.8	1.24×	not tested
Homogeneous non-metal compounds	2	2.1	0.94×	not tested
Organoheterocyclic compounds	1	1.5	0.66×	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
DB04566	IMP	Inosinic Acid	8
DB02333	DUT	Deoxyuridine-5'-Triphosphate	2
DB04315	GDP	Guanosine-5'-Diphosphate	2
DB04272	—	Citric acid	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
Y43	2'-deoxyinosine 5'-triphosphate	45
MGmetal	MAGNESIUM ION	27
ZNmetal	ZINC ION	24
ITT	INOSINE 5'-TRIPHOSPHATE	11
IMP	INOSINIC ACID	8
CAmetal	CALCIUM ION	6
NAmetal	SODIUM ION	6
UNX	UNKNOWN ATOM OR ION	6
57O	(4,6-dihydroxy-3,5-dimethylpyridin-2-yl)acetic acid	4
FEG	5'-O-[(S)-{[2-(carboxymethyl)-6-hydroxy-3,5-dimethylpyridin-4-yl]oxy}(hydroxy)phosphoryl]guanosine	4
YGP	5'-O-[(R)-[(3,6-dimethyl-2-oxo-1,2-dihydropyridin-4-yl)oxy](hydroxy)phosphoryl]guanosine	4
CL	CHLORIDE ION	2
DUT	DEOXYURIDINE-5'-TRIPHOSPHATE	2
GDP	GUANOSINE-5'-DIPHOSPHATE	2
MNmetal	MANGANESE (II) ION	2
ANP	PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER	1
POP	PYROPHOSPHATE 2-	1