CUA
PCM
| Residue type | PCM type | Category | Position | UniProt PTM accession | Entries in PDB |
| CYS | None | Metal coordination | Amino-acid side chain (Any position) | 251 | |
| CYS | None | Metal coordination | Amino-acid backbone (Any position) | 0 | |
| CYS | None | Metal coordination | Amino-acid side chain (Any position) | 230 | |
| GLN | None | Metal coordination | Amino-acid backbone (Any position) | 30 | |
| GLN | None | Metal coordination | Amino-acid backbone (Any position) | 2 | |
| GLU | None | Metal coordination | Amino-acid side chain (Any position) | 0 | |
| GLU | None | Metal coordination | Amino-acid backbone (Any position) | 5 | |
| GLU | None | Metal coordination | Amino-acid backbone (Any position) | 52 | |
| GLU | None | Metal coordination | Amino-acid backbone (Any position) | 0 | |
| HIS | None | Metal coordination | Amino-acid side chain (Any position) | 112 | |
| HIS | None | Metal coordination | Amino-acid backbone (Any position) | 5 | |
| HIS | None | Metal coordination | Amino-acid side chain (Any position) | 5 | |
| HIS | None | Metal coordination | Amino-acid side chain (Any position) | 129 | |
| HIS | None | Metal coordination | Amino-acid backbone (Any position) | 1 | |
| HIS | None | Metal coordination | Amino-acid side chain (Any position) | 8 | |
| MET | None | Metal coordination | Amino-acid side chain (Any position) | 75 | |
| MET | None | Metal coordination | Amino-acid side chain (Any position) | 50 | |
| TRP | None | Metal coordination | Amino-acid backbone (Any position) | 1 | |
| TRP | None | Metal coordination | Amino-acid backbone (Any position) | 21 |
