Table 1. Crystallographic analysis of GFLV particles.
Virus | GFLV-TD | GFLV-F13 |
Data collection statistics £ | ||
Beamline | ESRF/BM30 | SLS/X06DA |
Space group (number) | P213 (198) | P1 (1) |
Unit cell lengths a, b, c (Å) | 408.0 | 279.4 279.5 293.3 |
Unit cell angles alpha, beta, gamma (°) | 90.0 | 102.4 116.4 108.2 |
Resolution range (Å) | 36 – 2.7 | 135 – 3.0 |
Highest resolution shell (Å) | 2.77 – 2.7 | 3.08 – 3.0 |
No. of unique reflections | 563009 (32448) | 1214336 (73170) |
Completeness (%) | 92.0 (72.0) | 88.1 (71.7) |
Multiplicity | 11.0 (3.1) | 2.0 (1.9) |
Rmerge (%)† | 12.5 (68.1) | 10.0 (35.0) |
<I/sigma(I)> | 18 (1.9) | 9.2 (2.4) |
Molecular replacement | ||
Resolution range (Å) | 30 – 15 | 15 – 6.0 |
Asymmetric unit content | 20-mer | 60-mer |
Model | EM map | GFLV-TD |
Correlation/R-factor(%)# | 60.4/56.4 | 70.6/34.7 |
Refined atomic structure | ||
Resolution range (Å) | 36 – 2.7 | 135 – 3.0 |
R-factor/R-free (%)* | 19.3/21.0 | 19.0/20.7 |
Number of capsid and solvent atoms | 79100/556 | 237060/– |
Protein and solvent ADPs (Å2)** | 40.9/36.9 | 35.7/– |
R.m.s.d. on bonds (Å) and angles (°) | 0.009/1.19 | 0.010/1.20 |
£: Statistics are given for reflections with I> = 0 and values in parentheses are for the highest resolution shell.
†Rmerge = σhkl σi |Ii(hkl) - <I(hkl)>|/σhkl σi Ii(hkl).
The high R-factor can be explained, among other reasons, by the model used (a low resolution EM reconstruction, without filtering) and the absence of a bulk solvent correction.
*The cross-validation (R-free) was calculated with 5% of the data.
**ADPs: Atomic displacement parameters.