X-group (possible homology)

4312 RelE-like

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Ligands and drugs

551

Member domains

with ligand contacts (≤ 4 Å)

17.4% of members

with DrugDomain annotations

16.3% of members

with a DrugBank compound

11.8% 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)

—

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	5	5.3	0.94×	q = 1.00
Organosulfur compounds	1	0.2	4.48×	not tested
Homogeneous non-metal compounds	4	2.3	1.71×	not tested
Benzenoids	1	0.8	1.26×	not tested
Organic oxygen compounds	2	2.2	0.93×	not tested
Nucleosides, nucleotides, and analogues	1	3.0	0.33×	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
DB08357	P4G	Diethylene glycol diethyl ether	8
DB01812	A3P	Adenosine 3',5'-diphosphate	2
DB02774	PDO	1,3-Propanediol	2

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CL	CHLORIDE ION	16
MGmetal	MAGNESIUM ION	9
P4G	1-ETHOXY-2-(2-ETHOXYETHOXY)ETHANE	8
A3P	ADENOSINE-3'-5'-DIPHOSPHATE	2
BEN	BENZAMIDINE	2
BR	BROMIDE ION	2
IOD	IODIDE ION	2
PDO	1,3-PROPANDIOL	2
ZNmetal	ZINC ION	2
CUmetal	COPPER (II) ION	1
NAmetal	SODIUM ION	1
SCN	THIOCYANATE ION	1
TEW	6-tungstotellurate(VI)	1