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. Author manuscript; available in PMC: 2021 Jul 4.
Published in final edited form as: Nat Struct Mol Biol. 2021 Jan 4;28(2):162–172. doi: 10.1038/s41594-020-00541-x

Table 2.

Cryo-EM data collection, refinement and validation statistics of mutant ScSec complexes

PM ScSec
[Sec62−]
(EMD-22778,
PDB 7KAO)
PM ScSec
[C1]
(EMD-
22779, PDB
7KAP)
PM ScSec
[C2]
(EMD-22780, PDB
7KAQ)
FN3mut
ScSec
[Sec62−]
(EMD-
22781, PDB
7KAR)
FN3mut
ScSec
[Sec62+]
(EMD-
22782, PDB
7KAS)
PM/FN3mut
ScSec
[Sec62−]
(EMD-
22783, PDB
7KAT)
PM/FN3mut
ScSec
[Sec62+]
(EMD-
22784, PDB
7KAU)
FN3mut/
Δ210-216
ScSec
(EMD-
22787, PDB
7KB5)
Data collection and processing
Magnification 64,000x 64,000x 64,000x 64,000x 64,000x 64,000x 64,000x 45,000x
Voltage (kV) 300 300 300 300 300 300 300 200
Electron exposure
(e2) 48.8 48.8 48.8 49.1 49.1 ~48–49 ~48–49 63
Defocus range (μm) −1.0 to −2.7 −1.0 to −2.7 −1.0 to −2.7 −0.8 to −2.7 −0.8 to −2.7 −1.1 to −2.2 −1.1 to −2.2 −0.7 to −2.0
Pixel size (Å) 1.15 1.15 1.15 1.19 1.19 1.19 1.19 0.9
Symmetry imposed C1 C1 C1 C1 C1 C1 C1 C1
Initial particle images (no.) 195,915 195,915 195,915 1,274,219 1,274,219 267,541 267,541 2,270,392
Final particle images (no.) 35,573 17,341 16,679 82,671 119,420 32,704 54,139 257,231
Map resolution (Å) 4.0 4.1 4.0 4.0 3.9 4.4 4.0 3.8
 FSC threshold 0.143 0.143 0.143 0.143 0.143 0.143 0.143 0.143
Map resolution range (Å) 3.5 - 14 3.5 - 17 3.5 - 16 3.4 - 14 3.3 - 18 3.7 - 19 3.4 - 16 3.2 - 13
Refinement
Initial model used PDB 7KAH PDB 7KAI PDB 7KAJ PDB 7KAH PDB 7KAR PDB 7KAH PDB 7KAT PDB 7KAH
Model resolution (Å) 4.2 4.2 4.2 4.2 4.1 4.5 4.2 4.0
 FSC threshold 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Map sharpening B factor (Å2) 50.9 39.3 32.9 74.8 73.8 59.3 58.1 119.3
Model composition
 Non-hydrogen atoms 10,502 10,715 10,753 10,435 10,616 10,431 10,711 9,777
 Protein residues 1,349 1,398 1,402 1,341 1,385 1,340 1,396 1,252
 Ligands - - - - - - - -
B factors (Å2)
 Protein 152 178 187 117 64 255 125 126
 Ligand - - - - - - - -
R.m.s. deviations
 Bond lengths (Å) 0.003 0.003 0.002 0.003 0.004 0.002 0.003 0.004
 Bond angles (°) 0.520 0.519 0.494 0.581 0.596 0.501 0.533 0.626
Validation
MolProbity score 1.48 1.49 1.46 1.58 1.63 1.37 1.53 1.71
Clashscore 7.65 7.87 7.39 7.84 6.69 6.71 6.26 7.3
Poor rotamers (%) 0 0 0 0 0 0 0 0
Ramachandran plot
 Favored (%) 97.74 97.74 97.75 97.19 96.17 98.10 96.86 95.60
 Allowed (%) 2.26 2.26 2.25 2.81 3.83 1.90 3.14 4.40
 Disallowed (%) 0 0 0 0 0 0 0 0