X-group (possible homology)

4291 Oxysterol-binding protein

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Ligands and drugs

266

Member domains

with ligand contacts (≤ 4 Å)

14.3% of members

with DrugDomain annotations

13.9% of members

with a DrugBank compound

7.5% 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
Lipids and lipid-like molecules	7	0.8	9.11×	not tested
Organic oxygen compounds	2	1.4	1.46×	not tested
Homogeneous metal compounds	1	3.4	0.29×	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	8
DB04447	DTT	1,4-Dithiothreitol	6
DB00144	P5S	Phosphatidyl serine	2
DB04038	ERG	Ergosterol	2
DB01692	DTU	Dithioerythritol	1
DB04704	HC2	20-hydroxycholesterol	1
DB04705	HC3	25-Hydroxycholesterol	1
DB04706	HCR	7beta-hydroxycholesterol	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CLR	CHOLESTEROL	8
DTT	2,3-DIHYDROXY-1,4-DITHIOBUTANE	6
2Y5	(2R)-1-{[(R)-hydroxy{[(1R,2R,3R,4R,5S,6R)-2,3,5,6-tetrahydroxy-4-(phosphonooxy)cyclohexyl]oxy}phosphoryl]oxy}-3-(octadecanoyloxy)propan-2-yl (5Z,8Z,11Z,14Z)-icosa-5,8,11,14-tetraenoate	4
IEP	[(2~{S})-1-octadecanoyloxy-3-[oxidanyl-[(1~{R},2~{R},3~{S},4~{S},5~{S},6~{S})-2,3,6-tris(oxidanyl)-4,5-diphosphonooxy-cyclohexyl]oxy-phosphoryl]oxy-propan-2-yl] icosa-5,8,11,14-tetraenoate	4
P5S	O-[(R)-{[(2R)-2,3-bis(octadecanoyloxy)propyl]oxy}(hydroxy)phosphoryl]-L-serine	3
PBmetal	LEAD (II) ION	3
PIF	(2R)-3-{[(S)-hydroxy{[(1R,2R,3R,4R,5S,6R)-2,3,5,6-tetrahydroxy-4-(phosphonooxy)cyclohexyl]oxy}phosphoryl]oxy}propane-1,2-diyl dioctanoate	3
0T9	(3S,8S,9S,10R,13S,14S,17R)-3-hydroxy-10,13-dimethyl-17-[(2S,6S)-6-methyl-3-oxooctan-2-yl]-1,2,3,4,7,8,9,10,11,12,13,14,15,17-tetradecahydro-16H-cyclopenta[a]phenanthren-16-one	2
1KG	(3beta,9beta,22R,25R)-3-hydroxyfurost-5-en-27-yl propanoate	2
ERG	ERGOSTEROL	2
L39	(3beta,9beta,25R)-3-hydroxy-26-iodocholest-5-ene-16,22-dione	2
T7M	(2R)-1-(heptadecanoyloxy)-3-{[(R)-hydroxy{[(1R,2R,3R,4R,5S,6R)-2,3,5,6-tetrahydroxy-4-(phosphonooxy)cyclohexyl]oxy}phosphoryl]oxy}propan-2-yl (5Z,8Z,11Z,14Z)-icosa-5,8,11,14-tetraenoate	2
DTU	(2R,3S)-1,4-DIMERCAPTOBUTANE-2,3-DIOL	1
HC2	20-HYDROXYCHOLESTEROL	1
HC3	25-HYDROXYCHOLESTEROL	1
HCR	7-HYDROXYCHOLESTEROL	1