X-group (possible homology)

4232 Ribosomal protein bL28-related

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Ligands and drugs

2,065

Member domains

561

with ligand contacts (≤ 4 Å)

27.2% of members

282

with DrugDomain annotations

13.7% of members

with a DrugBank compound

1.0% 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	12	6.3	1.91×	q = 3.2e-3
Mixed metal/non-metal compounds	1	0.3	3.71×	not tested
Organic oxygen compounds	1	2.6	0.39×	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
MGmetal	MAGNESIUM ION	500
ZNmetal	ZINC ION	29
Kmetal	POTASSIUM ION	14
SPD	SPERMIDINE	11
OHX	osmium (III) hexammine	7
OIY	Streptothricin D	3
PUT	1,4-DIAMINOBUTANE	3
OI9	Streptothricin F	2
UNX	UNKNOWN ATOM OR ION	2
CU1metal	COPPER (I) ION	1