3236 Cation-proton antiporter
Ligands and drugs
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.
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 |
|---|---|---|---|---|---|
| Homogeneous metal compounds | 5 | 8.2 | 0.61× | q = 0.20 | |
| Hydrocarbons | 3 | 0.1 | 26× | not tested | |
| Lipids and lipid-like molecules | 15 | 1.9 | 8.04× | not tested | |
| Organic nitrogen compounds | 2 | 0.5 | 3.74× | not tested | |
| Benzenoids | 1 | 1.2 | 0.82× | not tested | |
| Organic oxygen compounds | 2 | 3.3 | 0.60× | not tested | |
| Organoheterocyclic compounds | 1 | 2.6 | 0.39× | not tested | |
| Organic acids and derivatives | 1 | 2.6 | 0.39× | not tested | |
| Homogeneous non-metal compounds | 1 | 3.6 | 0.28× | not tested |
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 |
|---|---|---|---|
| DB03429 | CDL | Tetrastearoyl cardiolipin | 6 |
| DB04372 | DLP | L-Dilinoleoyllecithin | 6 |
| DB04237 | TAM | Tris(Hydroxyethyl)Aminomethane | 5 |
| DB03279 | LMU | Dodecyl-Alpha-D-Maltoside | 4 |
| DB13171 | A6L | Glyceryl 1-oleate | 4 |
| DB02379 | BGC | Beta-D-Glucose | 2 |
| DB03831 | MPG | [(Z)-octadec-9-enyl] (2R)-2,3-bis(oxidanyl)propanoate | 2 |
| DB04348 | TCH | Taurocholic acid | 2 |
| DB07950 | IAC | Indoleacetic acid | 2 |
| DB00145 | GLY | Glycine | 1 |
| DB00594 | — | Amiloride | 1 |
| DB01930 | PAF | 2,4-Dihydroxy-3,3-Dimethyl-Butyrate | 1 |
| DB02123 | CHO | Glycochenodeoxycholic Acid | 1 |
| DB02624 | — | Homoserine Lactone | 1 |
| DB04540 | CLR | Cholesterol | 1 |
| DB06468 | — | — | 1 |
| DB11761 | — | — | 1 |
| DB13914 | — | — | 1 |
| DB16226 | — | — | 1 |
| DB16261 | — | — | 1 |
Most frequently bound compounds
| PDB ligand | Name | Domains in contact |
|---|---|---|
| NAmetal | SODIUM ION | 29 |
| POV | (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate | 22 |
| AJP | Digitonin | 20 |
| DLP | 1,2-DILINOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE | 14 |
| PLM | PALMITIC ACID | 10 |
| 3PH | 1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE | 8 |
| CDL | CARDIOLIPIN | 8 |
| PTY | PHOSPHATIDYLETHANOLAMINE | 7 |
| UND | UNDECANE | 7 |
| Kmetal | POTASSIUM ION | 6 |
| PGW | (1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl(9Z)-octadec-9-enoate | 6 |
| A6L | 2,3-dihydroxypropyl (9Z)-octadec-9-enoate | 5 |
| TAM | TRIS(HYDROXYETHYL)AMINOMETHANE | 5 |
| CPL | 1-PALMITOYL-2-LINOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE | 4 |
| LMU | DODECYL-ALPHA-D-MALTOSIDE | 4 |
| LPP | 2-(HEXADECANOYLOXY)-1-[(PHOSPHONOOXY)METHYL]ETHYL HEXADECANOATE | 4 |
| Y01 | CHOLESTEROL HEMISUCCINATE | 4 |
| 3PE | 1,2-Distearoyl-sn-glycerophosphoethanolamine | 3 |
| A1IHP | 2-(4-chloranylphenoxy)ethanoic acid | 3 |
| CL | CHLORIDE ION | 3 |