| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 6D72-CA-11 | CA | Ca²⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 5 | 2 | ✘ |
| 6D72-CA-12 | CA | Ca²⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 5 | 2 | ✘ |
| 5CRH-CA-6 | CA | Ca²⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 6 | 2 | ✘ |
| 5CRH-CA-11 | CA | Ca²⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 6 | 2 | ✘ |
| 5L8B-CA-2 | CA | Ca²⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 4 | 2 | ✔ |
| 5L8B-CA-5 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✘ |
| 5L8B-CA-6 | CA | Ca²⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 5 | 2 | ✘ |
| 5L8G-CA-1 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✔ |
| 5L8G-CA-18 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✘ |
| 5KN1-CA-6 | CA | Ca²⁺ | E3 | GLU. | ASP.GLU.HOH. | ✔ | 3 | 6 | 2 | ✘ |
| 5KN1-CA-9 | CA | Ca²⁺ | E3 | GLU. | ASP.GLU.HOH. | ✔ | 3 | 5 | 2 | ✘ |
| 5KN2-CA-9 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✔ |
| 4OUS-CA-1 | CA | Ca²⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 6 | 3 | ✔ |
| 6WX6-CA-1 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✔ |
| 6WX6-CA-2 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 6WX6-CA-3 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 6WX6-CA-4 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 6WX6-CA-5 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 6WX6-CA-6 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 6WX6-CA-7 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |