X-group (possible homology)

3745 Sodium/Calcium exchanger

Open in classification tree →

Ligands and drugs

341

Member domains

with ligand contacts (≤ 4 Å)

6.5% of members

with DrugDomain annotations

6.5% of members

with a DrugBank compound

1.5% 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
Hydrocarbons	1	0.0	48×	not tested
Phenylpropanoids and polyketides	1	0.1	16×	not tested
Lipids and lipid-like molecules	3	0.3	9.11×	not tested
Homogeneous non-metal compounds	2	0.6	3.14×	not tested
Homogeneous metal compounds	3	1.5	2.07×	not tested
Organic oxygen compounds	1	0.6	1.70×	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
DB02343	P3G	3,6,9,12,15-Pentaoxaheptadecane	1
DB02375	MYC	Myricetin	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
OLC	(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate	18
MYS	PENTADECANE	17
CAmetal	CALCIUM ION	13
NAmetal	SODIUM ION	11
CL	CHLORIDE ION	5
SRmetal	STRONTIUM ION	5
IOD	IODIDE ION	2
MNmetal	MANGANESE (II) ION	2
OLA	OLEIC ACID	2
CDmetal	CADMIUM ION	1
OLB	(2S)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate	1
P3G	3,6,9,12,15-PENTAOXAHEPTADECANE	1
TOE	2-[2-(2-METHOXY-ETHOXY)-ETHOXY]-ETHOXYL	1