Calcium in PDB 4gow: Crystal Structure of CA2+/Cam:KV7.4 (KCNQ4) B Helix Complex

The structure of Crystal Structure of CA2+/Cam:KV7.4 (KCNQ4) B Helix Complex, PDB code: 4gow was solved by Q.Xu, A.Chang, A.Tolia, D.L.Minor Jr., with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	48.09 / 2.60
Space group	P 65 2 2
Cell size a, b, c (Å), α, β, γ (°)	104.075, 104.075, 113.729, 90.00, 90.00, 120.00
R / Rfree (%)	23.6 / 26.8

The binding sites of Calcium atom in the Crystal Structure of CA2+/Cam:KV7.4 (KCNQ4) B Helix Complex (pdb code 4gow). This binding sites where shown within 5.0 Angstroms radius around Calcium atom.
In total 4 binding sites of Calcium where determined in the Crystal Structure of CA2+/Cam:KV7.4 (KCNQ4) B Helix Complex, PDB code: 4gow:
Jump to Calcium binding site number: 1; 2; 3; 4;

Calcium binding site 1 out of 4 in the Crystal Structure of CA2+/Cam:KV7.4 (KCNQ4) B Helix Complex


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of Crystal Structure of CA2+/Cam:KV7.4 (KCNQ4) B Helix Complex within 5.0Å range: probe atom residue distance (Å) B Occ D:Ca201 b:0.5 occ:1.00 OD2 D:ASP22 3.2 87.2 1.0 OD2 D:ASP24 3.3 94.5 1.0 OD1 D:ASP24 3.3 93.9 1.0 OE2 D:GLU31 3.4 77.2 1.0 OE1 D:GLU31 3.4 72.3 1.0 O D:HOH302 3.5 64.4 1.0 CD D:GLU31 3.5 64.7 1.0 CG D:ASP24 3.6 85.6 1.0 O D:THR26 3.7 56.5 1.0 CG2 D:THR28 3.7 45.2 1.0 OD1 D:ASP22 3.7 85.9 1.0 CG D:ASP22 3.8 82.9 1.0 OG1 D:THR26 4.0 74.8 1.0 CB D:THR28 4.1 58.9 1.0 O D:HOH316 4.4 60.3 1.0 N D:THR28 4.5 49.3 1.0 CG D:GLU31 4.6 47.6 1.0 C D:THR26 4.6 59.2 1.0 OD1 D:ASP20 4.6 76.3 1.0 CB D:ASP24 4.9 69.3 1.0 CA D:THR28 5.0 49.2 1.0

Calcium binding site 2 out of 4 in the Crystal Structure of CA2+/Cam:KV7.4 (KCNQ4) B Helix Complex


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 2 of Crystal Structure of CA2+/Cam:KV7.4 (KCNQ4) B Helix Complex within 5.0Å range: probe atom residue distance (Å) B Occ D:Ca202 b:0.1 occ:1.00 OD1 D:ASN60 3.2 0.4 1.0 OE2 D:GLU67 3.3 85.1 1.0 OD1 D:ASP58 3.3 0.2 1.0 O D:THR62 3.3 75.2 1.0 ND2 D:ASN60 3.4 96.2 1.0 OE1 D:GLU67 3.5 70.2 1.0 OG1 D:THR62 3.6 77.0 1.0 OD1 D:ASP64 3.6 79.0 1.0 CG D:ASP64 3.6 77.8 1.0 CD D:GLU67 3.7 73.5 1.0 OD2 D:ASP56 3.7 83.7 1.0 CG D:ASN60 3.7 94.8 1.0 OD2 D:ASP58 3.8 92.7 1.0 N D:ASP64 3.8 50.4 1.0 CB D:ASP64 3.9 66.3 1.0 CG D:ASP58 3.9 0.4 1.0 C D:THR62 4.0 63.0 1.0 OD2 D:ASP64 4.1 90.5 1.0 C D:ILE63 4.4 52.2 1.0 CA D:ASP64 4.5 58.6 1.0 CA D:ILE63 4.6 48.5 1.0 CB D:THR62 4.7 68.4 1.0 N D:ILE63 4.7 55.0 1.0 CG D:ASP56 4.8 74.5 1.0 O D:HOH311 4.8 65.2 1.0 CA D:THR62 4.9 62.2 1.0 CG D:GLU67 5.0 61.6 1.0

Calcium binding site 3 out of 4 in the Crystal Structure of CA2+/Cam:KV7.4 (KCNQ4) B Helix Complex


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 3 of Crystal Structure of CA2+/Cam:KV7.4 (KCNQ4) B Helix Complex within 5.0Å range: probe atom residue distance (Å) B Occ D:Ca203 b:0.6 occ:1.00 OE1 D:GLU104 3.2 74.7 1.0 OD1 D:ASN97 3.3 95.2 1.0 OD2 D:ASP95 3.3 81.2 1.0 ND2 D:ASN97 3.5 71.9 1.0 CG D:ASN97 3.6 87.1 1.0 OE1 D:GLN135 3.6 96.8 1.0 OD1 D:ASP95 3.9 87.7 1.0 CG D:ASP95 4.0 86.5 1.0 CB D:SER101 4.0 77.5 1.0 O D:TYR99 4.1 83.7 1.0 CD D:GLU104 4.2 82.5 1.0 CB D:ASN97 4.7 78.6 1.0 CG D:GLU104 4.7 72.2 1.0 N D:SER101 4.7 58.6 1.0 OG D:SER101 4.8 79.6 1.0 CD D:GLN135 4.8 93.5 1.0 CA D:SER101 4.9 70.0 1.0

Calcium binding site 4 out of 4 in the Crystal Structure of CA2+/Cam:KV7.4 (KCNQ4) B Helix Complex


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 4 of Crystal Structure of CA2+/Cam:KV7.4 (KCNQ4) B Helix Complex within 5.0Å range: probe atom residue distance (Å) B Occ D:Ca204 b:98.1 occ:1.00 OD2 D:ASP133 3.1 63.6 1.0 OD1 D:ASP131 3.1 55.9 1.0 OE1 D:GLU140 3.2 68.8 1.0 OD2 D:ASP131 3.2 76.0 1.0 OD1 D:ASP133 3.2 61.7 1.0 O D:GLN135 3.4 68.0 1.0 CG D:ASP133 3.4 55.9 1.0 CG D:ASP131 3.6 54.9 1.0 OD1 D:ASN137 3.6 62.4 1.0 CB D:ASN137 3.6 57.4 1.0 CD D:GLU140 3.7 46.7 1.0 OE2 D:GLU140 3.7 52.2 1.0 CG D:ASN137 3.7 67.5 1.0 N D:ASN137 3.7 43.1 1.0 CE1 D:TYR99 3.8 58.1 1.0 CD1 D:TYR99 3.9 54.5 1.0 C D:GLN135 4.2 53.7 1.0 OD2 D:ASP129 4.2 64.4 1.0 CA D:ASN137 4.2 52.0 1.0 C D:VAL136 4.5 54.3 1.0 ND2 D:ASN137 4.5 70.3 1.0 CB D:ASP133 4.8 46.0 1.0 CA D:VAL136 4.8 45.3 1.0 N D:VAL136 4.9 49.2 1.0 CG D:GLU140 4.9 45.2 1.0

Q.Xu, A.Chang, A.Tolia, D.L.Minor. Structure of A Ca(2+)/Cam:KV7.4 (KCNQ4) B-Helix Complex Provides Insight Into M Current Modulation. J.Mol.Biol. V. 425 378 2013.
ISSN: ISSN 0022-2836
PubMed: 23178170
DOI: 10.1016/J.JMB.2012.11.023