| Id | Element | Ion | Binding family | Amino acids or nucleotide residues names | All bound residues | Is homomer | Number of bound amino acids or nucleotide residues | Number of all bound residues | Number of coordinating chains | Representative |
|---|---|---|---|---|---|---|---|---|---|---|
| 2EF0-NA-1 | NA | Na⁺ | H3 | HIS. | HIS. | ✔ | 3 | 3 | 3 | ✔ |
| 5ESR-CO-1 | CO | Co²⁺ | H3 | HIS. | HIS. | ✔ | 3 | 3 | 2 | ✔ |
| 5ESR-CO-2 | CO | Co²⁺ | H3 | HIS. | HIS. | ✔ | 3 | 3 | 2 | ✔ |
| 5ESR-CO-3 | CO | Co²⁺ | H3 | HIS. | HIS. | ✔ | 3 | 3 | 2 | ✘ |
| 5FA8-MG-1 | MG | Mg²⁺ | H3 | HIS. | HIS. | ✔ | 3 | 3 | 2 | ✔ |
| 6AI5-ZN-1 | ZN | Zn²⁺ | H3 | HIS. | HIS. | ✔ | 3 | 3 | 2 | ✘ |
| 2J4K-CD-1 | CD | Cd²⁺ | H3 | HIS. | HIS. | ✔ | 3 | 3 | 3 | ✔ |
| 2J4J-CO-1 | CO | Co²⁺ | H3 | HIS. | HIS. | ✔ | 3 | 3 | 3 | ✔ |
| 2J4J-CO-2 | CO | Co²⁺ | H3 | HIS. | HIS. | ✔ | 3 | 3 | 3 | ✘ |
| 1II0-CD-3 | CD | Cd²⁺ | H3 | HIS. | HIS. | ✔ | 3 | 3 | 2 | ✔ |
| 4ZP1-NI-2 | NI | Ni²⁺ | H3 | HIS. | HIS. | ✔ | 3 | 3 | 2 | ✔ |
| 1WRO-BA-5 | BA | Ba²⁺ | H3 | HIS. | GLU.GLY. | ✔ | 3 | 2 | 2 | ✘ |
| 1WRO-BA-6 | BA | Ba²⁺ | H3 | HIS. | GLU.GLY. | ✔ | 3 | 2 | 2 | ✘ |
| 1WRO-BA-9 | BA | Ba²⁺ | H3 | HIS. | GLU.GLY. | ✔ | 3 | 2 | 2 | ✘ |
| 3EN1-FE-1 | FE | Fe²⁺ | H3 | HIS. | HIS. | ✔ | 3 | 3 | 3 | ✔ |
| 3EQQ-FE-1 | FE | Fe²⁺ | H3 | HIS. | HIS. | ✔ | 3 | 3 | 3 | ✘ |
| 2PPE-CU-1 | CU | Cu²⁺ | H3 | HIS. | HIS. | ✔ | 3 | 3 | 2 | ✘ |
| 2PPD-CU-1 | CU | Cu²⁺ | H3 | HIS. | HIS.NO. | ✔ | 3 | 4 | 2 | ✘ |
| 2PPD-CU-2 | CU | Cu²⁺ | H3 | HIS. | HIS. | ✔ | 3 | 3 | 2 | ✔ |
| 2PPC-CU-1 | CU | Cu²⁺ | H3 | HIS. | HIS.NO2. | ✔ | 3 | 4 | 2 | ✘ |