UNK
UNKNOWN
UNK is the code for unknown amino acids only. For example, a poly-ALA or poly-GLY chain would be processed as poly-UNK, if the author does not know how the coordinates align with the sequence and the residue numbering is arbitrary.
Find entries where: UNK
is present as a standalone ligand in 14 entries
as a non-polymer is covalently linked to polymer or other heterogen groups 5 entries
is present in a polymer sequence 1,545 entries
Chemical Component Summary | |
|---|---|
| Name | UNKNOWN |
| Identifiers | (2S)-2-aminobutanoic acid |
| Formula | C4 H9 N O2 |
| Molecular Weight | 103.12 |
| Type | L-PEPTIDE LINKING |
| Isomeric SMILES | CC[C@@H](C(=O)O)N |
| InChI | InChI=1S/C4H9NO2/c1-2-3(5)4(6)7/h3H,2,5H2,1H3,(H,6,7)/t3-/m0/s1 |
| InChIKey | QWCKQJZIFLGMSD-VKHMYHEASA-N |
Chemical Details | |
|---|---|
| Formal Charge | 0 |
| Atom Count | 16 |
| Chiral Atom Count | 1 |
| Bond Count | 15 |
| Aromatic Bond Count | 0 |
Related Resource References
| Resource Name | Reference |
|---|---|
| CCDC/CSD | KENDUC |
| PubChem | 80283 |
| PubChem | 6971252 |
| ChEBI | CHEBI:74359 |
| ChEBI | CHEBI:35619 |
| ChEMBL | CHEMBL1230782 |
