X-group (possible homology)

919 Ribosomal protein L36

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Ligands and drugs

2,315

Member domains

864

with ligand contacts (≤ 4 Å)

37.3% of members

636

with DrugDomain annotations

27.5% of members

with a DrugBank compound

<0.1% 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)

2.0

Superclasses per 20 proteins

narrower than 98% of the 256 X-groups with enough proteins to compare (median 7.6)

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	38	18.4	2.07×	q < 0.0001
Nucleosides, nucleotides, and analogues	1	10.4	0.10×	q = 4.6e-4
Homogeneous non-metal compounds	0	8.1	0	q = 5.7e-4
Organic acids and derivatives	0	5.8	0	q = 6.0e-3
Organic oxygen compounds	0	7.5	0	q = 9.6e-4
Organoheterocyclic compounds	0	5.8	0	q = 6.1e-3
Organic nitrogen compounds	1	1.2	0.84×	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
DB01917	PUT	Putrescine	1
DB03403	C	Cytidine-5'-Monophosphate	1
DB03685	U	Uridine monophosphate	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
ZNmetal	ZINC ION	829
MGmetal	MAGNESIUM ION	349
Kmetal	POTASSIUM ION	5
MNmetal	MANGANESE (II) ION	2
UNX	UNKNOWN ATOM OR ION	2
PUT	1,4-DIAMINOBUTANE	1