X-group (possible homology)

883 Aha1/BPI domain-like

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Ligands and drugs

926

Member domains

with ligand contacts (≤ 4 Å)

8.2% of members

with DrugDomain annotations

7.3% of members

with a DrugBank compound

4.4% 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	3	6.3	0.48×	q = 0.14
Lipids and lipid-like molecules	10	1.4	7.01×	not tested
Organosulfur compounds	1	0.3	3.79×	not tested
Organic oxygen compounds	4	2.6	1.57×	not tested
Homogeneous non-metal compounds	2	2.8	0.72×	not tested
Organoheterocyclic compounds	1	2.0	0.51×	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
DB04327	PEE	Phosphatidylethanolamine	10
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	4
DB00141	NAG	N-Acetylglucosamine	3
DB04372	DLP	L-Dilinoleoyllecithin	2
DB06281	0RP	Torcetrapib	2
DB08231	MYR	Myristic acid	2

Most frequently bound compounds

PDB ligand	Name	Domains in contact
NAmetal	SODIUM ION	13
PEE	1,2-dioleoyl-sn-glycero-3-phosphoethanolamine	10
PC1	1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE	8
2OB	CHOLESTERYL OLEATE	6
6OU	[(2~{R})-1-[2-azanylethoxy(oxidanyl)phosphoryl]oxy-3-hexadecanoyloxy-propan-2-yl] (~{Z})-octadec-9-enoate	4
CL	CHLORIDE ION	4
Kmetal	POTASSIUM ION	4
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	4
PCW	1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE	4
ZNmetal	ZINC ION	4
CAmetal	CALCIUM ION	3
0RP	ethyl(2R,4S)-4-{[3,5-bis(trifluoromethyl)benzyl](methoxycarbonyl)amino}-2-ethyl-6-(trifluoromethyl)-3,4-dihydroquinoline-1(2H)-carboxylate	2
0SF	(2R)-3-{[4-(4-chloro-3-ethylphenoxy)pyrimidin-2-yl][3-(1,1,2,2-tetrafluoroethoxy)benzyl]amino}-1,1,1-trifluoropropan-2-ol	2
BCR	BETA-CAROTENE	2
DLP	1,2-DILINOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE	2
EGC	2-(2-{2-[2-(2-{2-[2-(2-{2-[4-(1,1,3,3-TETRAMETHYL-BUTYL)-PHENOXY]-ETHOXY}-ETHOXY)-ETHOXY]-ETHOXY}-ETHOXY)-ETHOXY]-ETHOXY}-ETHOXY)-ETHANOL	2
JH2	methyl (2E,6E)-9-[(2R,3S)-3-ethyl-3-methyloxiran-2-yl]-3,7-dimethylnona-2,6-dienoate	2
MYR	MYRISTIC ACID	2
OLA	OLEIC ACID	2
UQ8	Ubiquinone-8	2