X-group (possible homology)

198 Saposin-like

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Ligands and drugs

679

Member domains

105

with ligand contacts (≤ 4 Å)

15.5% of members

with DrugDomain annotations

13.5% of members

with a DrugBank compound

10.3% 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	Ratio	Significance
Hydrocarbons	1	0.1	15×	not tested
Lipids and lipid-like molecules	6	1.1	5.46×	not tested
Organic oxygen compounds	3	2.0	1.53×	not tested
Benzenoids	1	0.7	1.39×	not tested
Organoheterocyclic compounds	2	1.5	1.32×	not tested
Homogeneous metal compounds	3	4.8	0.62×	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
DB00141	NAG	N-Acetylglucosamine	8
DB04327	PEE	Phosphatidylethanolamine	8
DB02767	FTT	(R)-3-hydroxytetradecanoic acid	7
DB08231	MYR	Myristic acid	4
DB00608	CLQ	Chloroquine	3
DB01117	AOQ	Atovaquone	3
DB02515	G3P	sn-glycerol 3-phosphate	1
DB03017	DAO	Lauric acid	1
DB03434	MPO	3-(N-morpholino)propanesulfonic acid	1
DB03796	PLM	Palmitic Acid	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
RXY	(7Z,19R,22R)-25-amino-22-hydroxy-16,22-dioxo-17,21,23-trioxa-22lambda~5~-phosphapentacos-7-en-19-yl (9Z)-octadec-9-enoate	12
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	8
PEE	1,2-dioleoyl-sn-glycero-3-phosphoethanolamine	8
FTT	3-HYDROXY-TETRADECANOIC ACID	7
MYR	MYRISTIC ACID	4
AOQ	2-[trans-4-(4-chlorophenyl)cyclohexyl]-3-hydroxynaphthalene-1,4-dione	3
CLQ	N4-(7-CHLORO-QUINOLIN-4-YL)-N1,N1-DIETHYL-PENTANE-1,4-DIAMINE	3
3PE	1,2-Distearoyl-sn-glycerophosphoethanolamine	2
D10	DECANE	2
FAW	(2S)-3-hydroxypropane-1,2-diyl ditetradecanoate	2
G3P	SN-GLYCEROL-3-PHOSPHATE	2
ZNmetal	ZINC ION	2
CAmetal	CALCIUM ION	1
DAO	LAURIC ACID	1
MPO	3[N-MORPHOLINO]PROPANE SULFONIC ACID	1
PLM	PALMITIC ACID	1
PX8	1,2-DISTEAROYL-SN-GLYCERO-3-PHOSPHATE	1