CUK
PCM
| Residue type | PCM type | Category | Position | UniProt PTM accession | Entries in PDB |
| HIS | None | Metal coordination | Amino-acid side chain (Any position) | 8 | |
| HIS | None | Metal coordination | Amino-acid side chain (Any position) | 14 | |
| HIS | None | Metal coordination | Amino-acid side chain (Any position) | 14 | |
| HIS | None | Metal coordination | Amino-acid side chain (Any position) | 18 | |
| HIS | None | Metal coordination | Amino-acid side chain (Any position) | 36 | |
| HIS | None | Metal coordination | Amino-acid side chain (Any position) | 4 | |
| HIS | None | Metal coordination | Amino-acid side chain (Any position) | 28 |
