X-group (possible homology)

3278 Transmembrane helix in sodium-potassium ATPase beta subunit

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Ligands and drugs

219

Member domains

123

with ligand contacts (≤ 4 Å)

56.2% of members

104

with DrugDomain annotations

47.5% of members

with a DrugBank compound

44.3% 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	0.25×observed / expected4×	Ratio	Significance
Lipids and lipid-like molecules	5	0.6		9.11×	not tested
Organic oxygen compounds	2	1.0		2.04×	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
DB04540	CLR	Cholesterol	93
DB03690	PCW	(Z,Z)-4-Hydroxy-N,N,N-Trimethyl-10-Oxo-7-[(1-Oxo-9-Octadecenyl)Oxy]-3,5,9-Trioxa-4-Phosphaheptacos-18-En-1-Aminium-4-Oxide	42
DB18573	17F	1,2-Dioleoyl-sn-glycero-3-phospho-L-serine	3
DB05351	—	—	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CLR	CHOLESTEROL	113
PCW	1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE	74
PC1	1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE	15
CE1	O-DODECANYL OCTAETHYLENE GLYCOL	4
17F	O-[(S)-({(2R)-2,3-bis[(9Z)-octadec-9-enoyloxy]propyl}oxy)(hydroxy)phosphoryl]-L-serine	3
Y01	CHOLESTEROL HEMISUCCINATE	3
Q7G	2-{[(4-O-alpha-D-glucopyranosyl-alpha-D-glucopyranosyl)oxy]methyl}-4-{[(3beta,9beta,14beta,17beta,25R)-spirost-5-en-3-yl]oxy}butyl 4-O-alpha-D-glucopyranosyl-alpha-D-glucopyranoside	2