3121 Polypeptide transport-associated (POTRA) domain
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 |
|---|---|---|---|---|---|
| Lipids and lipid-like molecules | 1 | 0.3 | 3.04× | not tested | |
| Organic oxygen compounds | 1 | 0.6 | 1.70× | not tested | |
| Homogeneous metal compounds | 1 | 1.5 | 0.69× | 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
No DrugBank compounds are annotated on this group's domains.
Most frequently bound compounds
| PDB ligand | Name | Domains in contact |
|---|---|---|
| MGmetal | MAGNESIUM ION | 2 |
| MC3 | 1,2-DIMYRISTOYL-RAC-GLYCERO-3-PHOSPHOCHOLINE | 1 |
| P6G | HEXAETHYLENE GLYCOL | 1 |
| PEV | (1S)-2-{[(2-AMINOETHOXY)(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL STEARATE | 1 |
| PGV | (1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE | 1 |