Table 1 Cryo-EM data collection, refinement and validation statistics

From: Cryo-EM structure of the human THIK-1 K2P K+ channel reveals a lower Y gate regulated by lipids and anesthetics

 

THIK-1

(EMDB-50741),

(PDB 9FT7)

Data collection and processing

Magnification

×105,000

Voltage (kV)

300

Electron exposure (e2)

42.54

Defocus range (μm)

−1 to −2.3

Pixel size (Å)

0.832

Symmetry imposed

C2

Initial particle images (no.)

9,257,778

Final particle images (no.)

302,189

Map resolution (Å)

3.53

 FSC threshold

0.5

Map resolution (Å)

3.16

 FSC threshold

0.143

Map resolution range (Å)

2.72–8.56

Refinement

Initial model used (PDB code)

De novo

Model resolution (Å)

3.29

 FSC threshold

0.5

Model resolution range (Å)

2.72–8.56

Map sharpening B factor (Å2)

−140

Model composition

 Non-hydrogen atoms

4,016

 Protein residues

508

 Potassium ions

2

 Linoleic acid

2

B factors (Å2)

 Protein

64.73

 Potassium ion

23.63

 Linoleic acid

48.43

R.m.s. deviations

 Bond lengths (Å)

0.007

 Bond angles (°)

1.064

Validation

 MolProbity score

0.85

 Clashscore

1.26

 Poor rotamers (%)

0

Ramachandran plot

Favored (%)

98.82

 Allowed (%)

1.18

 Disallowed (%)

0