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Potassium in PDB 3tcu: Crystal Structure of NAK2K Channel D68E Mutant

Protein crystallography data

The structure of Crystal Structure of NAK2K Channel D68E Mutant, PDB code: 3tcu was solved by D.B.Sauer, W.Zeng, S.Raghunathan, Y.Jiang, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å) 14.96 / 1.75
Space group I 4
Cell size a, b, c (Å), α, β, γ (°) 67.395, 67.395, 84.035, 90.00, 90.00, 90.00
R / Rfree (%) 20.2 / 22.5

Potassium Binding Sites:

The binding sites of Potassium atom in the Crystal Structure of NAK2K Channel D68E Mutant (pdb code 3tcu). This binding sites where shown within 5.0 Angstroms radius around Potassium atom.
In total 9 binding sites of Potassium where determined in the Crystal Structure of NAK2K Channel D68E Mutant, PDB code: 3tcu:
Jump to Potassium binding site number: 1; 2; 3; 4; 5; 6; 7; 8; 9;

Potassium binding site 1 out of 9 in 3tcu

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Potassium binding site 1 out of 9 in the Crystal Structure of NAK2K Channel D68E Mutant


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Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 1 of Crystal Structure of NAK2K Channel D68E Mutant within 5.0Å range:
probe atom residue distance (Å) B Occ
A:K1

b:59.4
occ:0.12
 K A:K1 0.0 59.4 0.1
K A:K1 1.9 56.8 0.1
O A:TYR66 3.0 46.1 1.0
K A:K2 3.2 36.0 0.2
O A:GLY65 3.3 45.3 1.0
C A:TYR66 3.8 48.6 1.0
CA A:TYR66 4.4 42.5 1.0
C A:GLY65 4.4 36.8 1.0
N A:GLY67 4.7 43.6 1.0
CA A:GLY67 4.9 37.3 1.0
N A:TYR66 4.9 36.7 1.0

Potassium binding site 2 out of 9 in 3tcu

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Potassium binding site 2 out of 9 in the Crystal Structure of NAK2K Channel D68E Mutant


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 2 of Crystal Structure of NAK2K Channel D68E Mutant within 5.0Å range:
probe atom residue distance (Å) B Occ
A:K1

b:56.8
occ:0.12
 K A:K1 0.0 56.8 0.1
K A:K1 1.9 59.4 0.1
O A:TYR66 2.9 46.1 1.0
C A:TYR66 4.1 48.6 1.0
O A:GLY65 4.6 45.3 1.0
CA A:GLY67 4.7 37.3 1.0
O A:HOH138 4.8 44.0 0.2
N A:GLY67 4.8 43.6 1.0

Potassium binding site 3 out of 9 in 3tcu

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Potassium binding site 3 out of 9 in the Crystal Structure of NAK2K Channel D68E Mutant


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 3 of Crystal Structure of NAK2K Channel D68E Mutant within 5.0Å range:
probe atom residue distance (Å) B Occ
A:K2

b:36.0
occ:0.25
 O A:GLY65 3.1 45.3 1.0
K A:K3 3.1 17.8 0.2
K A:K1 3.2 59.4 0.1
O A:VAL64 3.2 27.4 1.0
C A:GLY65 3.8 36.8 1.0
CA A:GLY65 4.1 23.3 1.0
C A:VAL64 4.2 30.4 1.0
N A:GLY65 4.6 26.8 1.0
N A:TYR66 4.7 36.7 1.0

Potassium binding site 4 out of 9 in 3tcu

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Potassium binding site 4 out of 9 in the Crystal Structure of NAK2K Channel D68E Mutant


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 4 of Crystal Structure of NAK2K Channel D68E Mutant within 5.0Å range:
probe atom residue distance (Å) B Occ
A:K3

b:17.8
occ:0.25
 O A:THR63 2.9 24.5 1.0
O A:VAL64 3.1 27.4 1.0
K A:K2 3.1 36.0 0.2
C A:VAL64 3.7 30.4 1.0
K A:K4 3.8 27.4 0.2
C A:THR63 4.0 25.9 1.0
CA A:VAL64 4.2 29.0 1.0
N A:GLY65 4.5 26.8 1.0
N A:VAL64 4.6 27.6 1.0
CA A:GLY65 4.8 23.3 1.0

Potassium binding site 5 out of 9 in 3tcu

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Potassium binding site 5 out of 9 in the Crystal Structure of NAK2K Channel D68E Mutant


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 5 of Crystal Structure of NAK2K Channel D68E Mutant within 5.0Å range:
probe atom residue distance (Å) B Occ
A:K4

b:27.4
occ:0.25
 OG1 A:THR63 3.0 36.3 1.0
O A:THR63 3.2 24.5 1.0
CB A:THR63 3.7 33.9 1.0
K A:K3 3.8 17.8 0.2
C A:THR63 4.0 25.9 1.0
CA A:THR63 4.5 24.9 1.0
CG2 A:THR63 4.9 30.3 1.0
O A:THR62 5.0 26.9 1.0
N A:VAL64 5.0 27.6 1.0

Potassium binding site 6 out of 9 in 3tcu

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Potassium binding site 6 out of 9 in the Crystal Structure of NAK2K Channel D68E Mutant


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 6 of Crystal Structure of NAK2K Channel D68E Mutant within 5.0Å range:
probe atom residue distance (Å) B Occ
B:K5

b:43.8
occ:0.25
 K B:K6 3.0 55.8 0.2
O B:TYR66 3.4 62.9 1.0
O B:GLY65 3.5 76.9 1.0
C B:TYR66 3.9 55.9 1.0
CA B:TYR66 4.2 60.1 1.0
C B:GLY65 4.4 56.7 1.0
N B:TYR66 4.8 51.4 1.0
N B:GLY67 4.8 48.2 1.0

Potassium binding site 7 out of 9 in 3tcu

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Potassium binding site 7 out of 9 in the Crystal Structure of NAK2K Channel D68E Mutant


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 7 of Crystal Structure of NAK2K Channel D68E Mutant within 5.0Å range:
probe atom residue distance (Å) B Occ
B:K6

b:55.8
occ:0.25
 K B:K5 3.0 43.8 0.2
K B:K7 3.1 14.9 0.2
O B:VAL64 3.2 28.5 1.0
O B:GLY65 3.5 76.9 1.0
C B:GLY65 3.9 56.7 1.0
CA B:GLY65 4.2 34.8 1.0
C B:VAL64 4.3 27.4 1.0
N B:TYR66 4.6 51.4 1.0
N B:GLY65 4.7 30.2 1.0
CA B:TYR66 4.9 60.1 1.0

Potassium binding site 8 out of 9 in 3tcu

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Potassium binding site 8 out of 9 in the Crystal Structure of NAK2K Channel D68E Mutant


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 8 of Crystal Structure of NAK2K Channel D68E Mutant within 5.0Å range:
probe atom residue distance (Å) B Occ
B:K7

b:14.9
occ:0.25
 O B:VAL64 3.0 28.5 1.0
O B:THR63 3.0 23.1 1.0
K B:K6 3.1 55.8 0.2
C B:VAL64 3.6 27.4 1.0
K B:K8 3.9 24.4 0.2
C B:THR63 4.1 29.3 1.0
CA B:VAL64 4.2 23.0 1.0
N B:GLY65 4.5 30.2 1.0
N B:VAL64 4.6 25.9 1.0
CA B:GLY65 4.8 34.8 1.0

Potassium binding site 9 out of 9 in 3tcu

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Potassium binding site 9 out of 9 in the Crystal Structure of NAK2K Channel D68E Mutant


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 9 of Crystal Structure of NAK2K Channel D68E Mutant within 5.0Å range:
probe atom residue distance (Å) B Occ
B:K8

b:24.4
occ:0.25
 OG1 B:THR63 2.9 30.1 1.0
O B:THR63 3.1 23.1 1.0
CB B:THR63 3.6 35.2 1.0
K B:K7 3.9 14.9 0.2
C B:THR63 4.0 29.3 1.0
CA B:THR63 4.5 23.8 1.0
CG2 B:THR63 4.8 28.1 1.0
N B:VAL64 4.9 25.9 1.0
O B:THR62 4.9 26.8 1.0

Reference:

D.B.Sauer, W.Zeng, S.Raghunathan, Y.Jiang. Protein Interactions Central to Stabilizing the K+ Channel Selectivity Filter in A Four-Sited Configuration For Selective K+ Permeation. Proc.Natl.Acad.Sci.Usa V. 108 16634 2011.
ISSN: ISSN 0027-8424
PubMed: 21933962
DOI: 10.1073/PNAS.1111688108
Page generated: Sat Aug 9 05:57:45 2025

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