X-group (possible homology)

184 Nucleoside phosphorylase/phosphoribosyltransferase-N

Open in classification tree →

Ligands and drugs

1,000

Member domains

with ligand contacts (≤ 4 Å)

3.8% of members

with DrugDomain annotations

3.2% of members

with a DrugBank compound

2.6% 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	2	0.4	5.55×	not tested
Homogeneous non-metal compounds	2	1.1	1.89×	not tested
Nucleosides, nucleotides, and analogues	1	1.4	0.73×	not tested
Homogeneous metal compounds	1	2.4	0.41×	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
DB04166	BE2	Anthranilic acid	5
DB02097	CTN	Cytidine	1
DB09343	—	—	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
BEN	BENZAMIDINE	3
CL	CHLORIDE ION	3
CTN	4-AMINO-1-BETA-D-RIBOFURANOSYL-2(1H)-PYRIMIDINONE	1
ZNmetal	ZINC ION	1