| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3NY0-NI-1 | NI | Ni²⁺ | H5 | HIS. | HIS. | ✔ | 5 | 5 | 4 | ✔ |
| 3WQA-NI-1 | NI | Ni²⁺ | H5 | HIS. | HIS. | ✔ | 5 | 5 | 3 | ✔ |
| 6WWX-NI-1 | NI | Ni²⁺ | H5 | HIS. | HIS. | ✔ | 5 | 5 | 3 | ✘ |
| 7N4F-NI-1 | NI | Ni²⁺ | H5 | HIS. | HIS. | ✔ | 5 | 5 | 2 | ✘ |
| 7LSL-NI-1 | NI | Ni²⁺ | H5 | HIS. | HIS. | ✔ | 5 | 5 | 2 | ✘ |
| 7LSN-NI-1 | NI | Ni²⁺ | H5 | HIS. | HIS. | ✔ | 5 | 5 | 2 | ✘ |
| 7LSN-NI-2 | NI | Ni²⁺ | H5 | HIS. | HIS. | ✔ | 5 | 5 | 2 | ✘ |
| 7LRA-NI-1 | NI | Ni²⁺ | H5 | HIS. | HIS. | ✔ | 5 | 5 | 2 | ✘ |
| 7LRV-NI-1 | NI | Ni²⁺ | H5 | HIS. | HIS. | ✔ | 5 | 5 | 2 | ✘ |
| 7LRV-NI-2 | NI | Ni²⁺ | H5 | HIS. | HIS. | ✔ | 5 | 5 | 2 | ✘ |
| 7LR5-NI-1 | NI | Ni²⁺ | H5 | HIS. | HIS. | ✔ | 5 | 5 | 2 | ✘ |
| 7LR5-NI-2 | NI | Ni²⁺ | H5 | HIS. | HIS. | ✔ | 5 | 5 | 2 | ✘ |