X-group (possible homology)

3352 STT3/PglB/AglB transmembrane domain

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Ligands and drugs

1,227

Member domains

with ligand contacts (≤ 4 Å)

2.3% of members

with DrugDomain annotations

1.5% of members

with a DrugBank compound

0.7% 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	5	0.7	7.59×	not tested
Organic nitrogen compounds	1	0.2	5.30×	not tested
Organoheterocyclic compounds	2	0.9	2.20×	not tested
Homogeneous metal compounds	6	2.9	2.07×	not tested
Organic oxygen compounds	1	1.2	0.85×	not tested
Homogeneous non-metal compounds	1	1.3	0.79×	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
DB02306	CPL	Palmitoyl-Linoleoyl Phosphatidylcholine	3
DB03831	MPG	[(Z)-octadec-9-enyl] (2R)-2,3-bis(oxidanyl)propanoate	2
DB00141	NAG	N-Acetylglucosamine	1
DB03945	PC	N,N,N-Trimethyl-2-(phosphonooxy)ethanaminium	1
DB04327	PEE	Phosphatidylethanolamine	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
MNmetal	MANGANESE (II) ION	6
CPL	1-PALMITOYL-2-LINOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE	5
MGmetal	MAGNESIUM ION	5
9UB	[(2~{S},3~{R},4~{R},5~{S},6~{R})-3-acetamido-6-(hydroxymethyl)-4,5-bis(oxidanyl)oxan-2-yl]methyl-[oxidanyl-[(2~{Z},6~{Z},10~{Z})-3,7,11,15-tetramethylhexadeca-2,6,10,14-tetraenoxy]phosphoryl]oxy-phosphinic acid	4
EGY	(4R,7R)-4-hydroxy-N,N,N-trimethyl-4,9-dioxo-7-[(undecanoyloxy)methyl]-3,5,8-trioxa-4lambda~5~-phosphadocosan-1-aminium	4
ELU	phosphono [(3~{R},6~{E},10~{E})-3,7,11,15-tetramethylhexadeca-6,10,14-trienyl] hydrogen phosphate	4
KZB	(2~{S},3~{R},4~{R},5~{S},6~{S})-2-(hydroxymethyl)-6-[(1~{S},2~{R},3~{R},4~{R},5'~{S},6~{S},7~{R},8~{S},9~{R},12~{R},13~{R},15~{S},16~{S},18~{R})-5',7,9,13-tetramethyl-3,15-bis(oxidanyl)spiro[5-oxapentacyclo[10.8.0.0^{2,9}.0^{4,8}.0^{13,18}]icosane-6,2'-oxane]-16-yl]oxy-oxane-3,4,5-triol	4
PTY	PHOSPHATIDYLETHANOLAMINE	4
323	2-[3,6-bis(dimethylamino)xanthen-9-yl]-5-methanoyl-benzoate	2
CL	CHLORIDE ION	2
MJC	dolichyl phosphate mannose	2
MPG	[(Z)-octadec-9-enyl] (2R)-2,3-bis(oxidanyl)propanoate	2
NAmetal	SODIUM ION	2
ZNmetal	ZINC ION	2
0K3	(2Z,6Z,10Z,14Z,18Z,22Z,26Z)-3,7,11,15,19,23,27,31-octamethyldotriaconta-2,6,10,14,18,22,26,30-octaen-1-yl dihydrogen phosphate	1
5TR	[(2~{E},6~{E},10~{E},14~{E},18~{Z},22~{E},26~{Z},30~{E},34~{E},38~{E})-3,7,11,15,19,23,27,31,35,39,43-undecamethyltetratetraconta-2,6,10,14,18,22,26,30,34,38,42-undecaenyl] dihydrogen phosphate	1
7E8	(2R)-2,3-DIHYDROXYPROPYL (7Z)-TETRADEC-7-ENOATE	1
A1A7X	2-deoxy-2-fluoro-1-O-[(S)-hydroxy{[(2E,6E)-3,7,11-trimethyldodeca-2,6,10-trien-1-yl]oxy}phosphoryl]-beta-D-arabinofuranose	1
A1I0M	dolichol-phosphate (n=4)	1
A1I0N	dolichol-phosphate-mannose (n=2)	1