| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 5UG4-CA-20 | CA | Ca²⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 5 | 2 | ✘ |
| 5UG4-CA-21 | CA | Ca²⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 5 | 2 | ✘ |
| 5UG4-CA-22 | CA | Ca²⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 5 | 2 | ✘ |
| 5UG4-CA-23 | CA | Ca²⁺ | E2N1P1 | ASN.GLU.PRO. | ASN.GLU.HOH.PRO. | ✔ | 4 | 6 | 2 | ✘ |
| 5UG4-CA-24 | CA | Ca²⁺ | E2N1P1 | ASN.GLU.PRO. | ASN.GLU.HOH.PRO. | ✔ | 4 | 6 | 2 | ✘ |
| 5UG4-CA-25 | CA | Ca²⁺ | E2N1P1 | ASN.GLU.PRO. | ASN.GLU.HOH.PRO. | ✔ | 4 | 6 | 2 | ✘ |
| 5UG4-CA-26 | CA | Ca²⁺ | E2N1P1 | ASN.GLU.PRO. | ASN.GLU.HOH.PRO. | ✔ | 4 | 6 | 2 | ✘ |
| 5UGO-CA-1 | CA | Ca²⁺ | C1D2 | ASP.DC. | 2PN.ASP.DC.HOH. | ✘ | 3 | 5 | 2 | ✔ |
| 5UGO-CA-2 | CA | Ca²⁺ | C2D3 | ASP.DC. | ASP.DC.HOH. | ✘ | 5 | 6 | 2 | ✘ |
| 5UVE-CA-1 | CA | Ca²⁺ | G1T1 | GLY.THR. | GLY.HOH.THR. | ✔ | 2 | 3 | 2 | ✔ |
| 5UVE-CA-2 | CA | Ca²⁺ | G1T1 | GLY.THR. | GLY.HOH.THR. | ✔ | 2 | 4 | 2 | ✘ |
| 6FQP-CA-1 | CA | Ca²⁺ | G2 | DG. | DG. | ✔ | 2 | 2 | 2 | ✔ |
| 1I0X-CA-1 | CA | Ca²⁺ | D1G1Y1 | ASP.GLY.TYR. | ASP.GLY.HOH.TYR. | ✔ | 3 | 6 | 2 | ✔ |
| 1I9B-CA-1 | CA | Ca²⁺ | D3 | ASP. | ASP. | ✔ | 3 | 3 | 2 | ✔ |
| 1I9B-CA-2 | CA | Ca²⁺ | D3 | ASP. | ASP. | ✔ | 3 | 3 | 2 | ✘ |
| 1I9B-CA-3 | CA | Ca²⁺ | D2 | ASP. | ASP. | ✔ | 2 | 2 | 2 | ✘ |
| 1INF-CA-1 | CA | Ca²⁺ | E4 | GLU. | GLU.HOH. | ✔ | 4 | 8 | 4 | ✘ |
| 1IOD-CA-1 | CA | Ca²⁺ | E2S2 | GLU.SER. | GLU.HOH.SER. | ✔ | 4 | 6 | 2 | ✔ |
| 1IOD-CA-2 | CA | Ca²⁺ | E1X2 | CGU.GLU. | CGU.GLU.HOH. | ✘ | 3 | 4 | 2 | ✔ |
| 1IOD-CA-3 | CA | Ca²⁺ | E1X2 | CGU.GLU. | CGU.GLU.HOH. | ✘ | 3 | 4 | 2 | ✘ |