320 R3H domain-like
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 |
|---|---|---|---|---|---|
| Organosulfur compounds | 1 | 0.2 | 4.93× | not tested | |
| Homogeneous metal compounds | 7 | 4.8 | 1.45× | not tested | |
| Nucleosides, nucleotides, and analogues | 2 | 2.7 | 0.73× | 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 |
|---|---|---|---|
| DB00118 | SAM | Ademetionine | 4 |
| DB03345 | BME | Mercaptoethanol | 1 |
| DB04457 | DGP | 2'-Deoxyguanosine-5'-Monophosphate | 1 |
Most frequently bound compounds
| PDB ligand | Name | Domains in contact |
|---|---|---|
| MGmetal | MAGNESIUM ION | 77 |
| UNL | Unknown ligand | 10 |
| OHX | osmium (III) hexammine | 4 |
| SAM | S-ADENOSYLMETHIONINE | 4 |
| UNX | UNKNOWN ATOM OR ION | 4 |
| Kmetal | POTASSIUM ION | 3 |
| NAmetal | SODIUM ION | 3 |
| BME | BETA-MERCAPTOETHANOL | 1 |
| DGP | 2'-DEOXYGUANOSINE-5'-MONOPHOSPHATE | 1 |
| ZNmetal | ZINC ION | 1 |