X-group (possible homology)

616 S15/NS1 RNA-binding domain

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Ligands and drugs

3,636

Member domains

369

with ligand contacts (≤ 4 Å)

10.1% of members

216

with DrugDomain annotations

5.9% of members

with a DrugBank compound

1.1% 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	6.3	1.43×	q = 0.23
Mixed metal/non-metal compounds	2	0.3	7.43×	not tested
Organic nitrogen compounds	2	0.4	4.89×	not tested
Organic acids and derivatives	2	2.0	1.01×	not tested
Organic oxygen compounds	1	2.6	0.39×	not tested
Homogeneous non-metal compounds	1	2.8	0.36×	not tested
Nucleosides, nucleotides, and analogues	1	3.5	0.28×	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
DB14128	NAD	Nadide	15
DB00139	SIN	Succinic acid	2
DB00145	GLY	Glycine	2
DB00160	ALA	Alanine	1
DB03309	NHE	N-cyclohexyltaurine	1
DB03566	SPD	Spermidine	1
DB11638	—	—	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
MGmetal	MAGNESIUM ION	217
OHX	osmium (III) hexammine	77
NAD	NICOTINAMIDE-ADENINE-DINUCLEOTIDE	34
Kmetal	POTASSIUM ION	10
PAR	PAROMOMYCIN	8
NAmetal	SODIUM ION	5
8UZ	TC007	3
GLY	GLYCINE	3
BR	BROMIDE ION	2
SIN	SUCCINIC ACID	2
SPD	SPERMIDINE	2
UNX	UNKNOWN ATOM OR ION	2
D10	DECANE	1
HEX	HEXANE	1
HY0	HYGROMYCIN B VARIANT	1
LLL	(2R,3R,4R,5R)-2-((1S,2S,3R,4S,6R)-4,6-DIAMINO-3-((2R,3R,6S)-3-AMINO-6-(AMINOMETHYL)-TETRAHYDRO-2H-PYRAN-2-YLOXY)-2-HYDROXYCYCLOHEXYLOXY)-5-METHYL-4-(METHYLAMINO)-TETRAHYDRO-2H-PYRAN-3,5-DIOL	1
NHE	2-[N-CYCLOHEXYLAMINO]ETHANE SULFONIC ACID	1
PGW	(1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl(9Z)-octadec-9-enoate	1
PLM	PALMITIC ACID	1
PX2	1,2-DILAUROYL-SN-GLYCERO-3-PHOSPHATE	1