| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3WUP-NA-1 | NA | Na⁺ | S3 | SER. | HOH.SER. | ✔ | 3 | 6 | 3 | ✔ |
| 5M9F-NA-1 | NA | Na⁺ | S3 | SER. | HOH.SER. | ✔ | 3 | 6 | 3 | ✔ |
| 5LK0-NA-1 | NA | Na⁺ | S3 | SER. | HOH.SER. | ✔ | 3 | 6 | 3 | ✘ |
| 5LJZ-NA-1 | NA | Na⁺ | S3 | SER. | HOH.SER. | ✔ | 3 | 6 | 3 | ✔ |
| 7XEE-NA-1 | NA | Na⁺ | S3 | SER. | HOH.SER. | ✔ | 3 | 5 | 2 | ✘ |
| 7XEF-NA-1 | NA | Na⁺ | S3 | SER. | HOH.SER. | ✔ | 3 | 6 | 2 | ✔ |