X-group (possible homology)

189 GTPase activation domain, GAP

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Ligands and drugs

1,153

Member domains

with ligand contacts (≤ 4 Å)

5.6% of members

with DrugDomain annotations

6.2% of members

with a DrugBank compound

4.7% 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
Homogeneous metal compounds	9	5.8	1.55×	q = 0.13
Mixed metal/non-metal compounds	9	0.3	36×	not tested
Nucleosides, nucleotides, and analogues	11	3.3	3.36×	not tested
Homogeneous non-metal compounds	3	2.6	1.18×	not tested
Organic oxygen compounds	1	2.4	0.42×	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
DB04315	GDP	Guanosine-5'-Diphosphate	25
DB02082	GNP	Phosphoaminophosphonic acid guanylate ester	6
DB04444	ALF	Tetrafluoroaluminate Ion	5
DB04137	GTP	Guanosine-5'-Triphosphate	2
DB00619	—	Imatinib	1
DB01254	—	Dasatinib	1
DB06486	—	—	1
DB06616	—	Bosutinib	1
DB08059	—	Wortmannin	1
DB08901	—	Ponatinib	1
DB11638	—	—	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
GDP	GUANOSINE-5'-DIPHOSPHATE	25
UNX	UNKNOWN ATOM OR ION	11
AF3	ALUMINUM FLUORIDE	8
MGF	TRIFLUOROMAGNESATE	7
CL	CHLORIDE ION	4
ALF	TETRAFLUOROALUMINATE ION	3
GNP	PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER	2
GTP	GUANOSINE-5'-TRIPHOSPHATE	2
7PE	2-(2-(2-(2-(2-(2-ETHOXYETHOXY)ETHOXY)ETHOXY)ETHOXY)ETHOXY)ETHANOL	1
GAI	GUANIDINE	1