X-group (possible homology)

3517 Polymerase acidic protein

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Ligands and drugs

174

Member domains

with ligand contacts (≤ 4 Å)

20.1% of members

with DrugDomain annotations

13.8% of members

with a DrugBank compound

11.5% 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
Benzenoids	1	0.4	2.77×	not tested
Organoheterocyclic compounds	2	0.8	2.64×	not tested
Organic oxygen compounds	1	1.0	1.02×	not tested
Homogeneous non-metal compounds	1	1.1	0.94×	not tested
Homogeneous metal compounds	2	2.4	0.83×	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 ligand	Name	Domains in contact
ZNmetal	ZINC ION	5
CL	CHLORIDE ION	2
V9G	7-METHYL-GUANOSINE-5'-TRIPHOSPHATE-5'-(2'-O-METHYL)-ADENOSINE	2
1CI	1-(4-CHLOROPHENYL)-1H-IMIDAZOLE	1
6AQ	1-(4-fluorophenyl)-1H-imidazole	1
6AR	1-(4-bromophenyl)-1H-imidazole	1
6AV	5-chloro-2-(1H-imidazol-1-yl)aniline	1
6AX	5-[(4-chlorophenyl)methyl]-1,3,4-oxadiazol-2-amine	1
6AY	N-[(4-chlorophenyl)methyl]-1-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine	1
6B0	(2,3-dichlorophenyl)methanol	1
6B1	(5,6-dichloro-1H-benzimidazol-2-yl)methanol	1
8QG	4-(5-chlorothiophen-2-yl)-1H-pyrazole	1
A1IG4	(E)-but-2-ene	1
EZS	1-{1-[(4-fluorophenyl)methyl]-2-methyl-1H-imidazol-4-yl}ethan-1-one	1
G2P	PHOSPHOMETHYLPHOSPHONIC ACID GUANYLATE ESTER	1
GTG	7-METHYL-GUANOSINE-5'-TRIPHOSPHATE-5'-GUANOSINE	1
GTP	GUANOSINE-5'-TRIPHOSPHATE	1
MGmetal	MAGNESIUM ION	1
MOE	METHOXY-ETHOXYL	1
RTP	RIBAVIRIN TRIPHOSPHATE	1