X-group (possible homology)

1038 Pre-mRNA-splicing factor 8 N-terminal domain

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Ligands and drugs

136

Member domains

with ligand contacts (≤ 4 Å)

58.1% of members

with DrugDomain annotations

37.5% of members

with a DrugBank compound

36.8% 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)

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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
Organic oxygen compounds	3	0.8	3.82×	not tested
Nucleosides, nucleotides, and analogues	4	1.1	3.67×	not tested
Organic acids and derivatives	1	0.6	1.64×	not tested
Homogeneous metal compounds	3	1.9	1.55×	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
DB04137	GTP	Guanosine-5'-Triphosphate	49
DB14981	IHP	Phytic acid	37
DB00160	ALA	Alanine	1
DB04315	GDP	Guanosine-5'-Diphosphate	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
IHP	INOSITOL HEXAKISPHOSPHATE	45
GTP	GUANOSINE-5'-TRIPHOSPHATE	44
MGmetal	MAGNESIUM ION	15
KGN	D-chiro inositol hexakisphosphate	2
ALA	ALANINE	1