| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2HR5-FE-5 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✔ |
| 2HR5-FE-6 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✘ |
| 2HR5-FE-7 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✘ |
| 2HR5-FE-8 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✘ |
| 1SHR-FE-1 | FE | Fe³⁺ | H3 | HIS. | CYN.HIS. | ✔ | 3 | 4 | 2 | ✔ |
| 5OBA-FE-1 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 5OBA-FE-2 | FE | Fe³⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 4 | 3 | ✘ |
| 5OBA-FE-3 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 5OBA-FE-4 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 5OBA-FE-5 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 5OBA-FE-6 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 5OBA-FE-7 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 5XNC-FE-1 | FE | Fe³⁺ | C4 | CYS. | CYS. | ✔ | 4 | 4 | 2 | ✔ |
| 5XNF-FE-1 | FE | Fe³⁺ | C4 | CYS. | CYS. | ✔ | 4 | 4 | 2 | ✘ |
| 5XNH-FE-1 | FE | Fe³⁺ | C4 | CYS. | CYS. | ✔ | 4 | 4 | 2 | ✘ |
| 5N5E-FE-1 | FE | Fe³⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 4 | 2 | ✔ |
| 5N5E-FE-2 | FE | Fe³⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 4 | 2 | ✘ |
| 5N5E-FE-3 | FE | Fe³⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 4 | 2 | ✘ |
| 5N5E-FE-4 | FE | Fe³⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 4 | 2 | ✘ |
| 5N5E-FE-5 | FE | Fe³⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 4 | 2 | ✘ |