Table 1. Data collection, phasing and refinement statistics.
| Crystal form I-F1 | Crystal form II-F2 | FtsY-CMNP | |
| Data processing | |||
| Source (wavelength, Å) | SSRL 7-1 (λ = 1.08) | SSRL 9-1 (λ = 0.98) | ALS 5.0.2 |
| (λ1 = 1.006, λ2 = 1.009, λ3 = 0.993) | |||
| Space group | P212121 | P212121 | P212121 |
| Unit cell, Å | a = 63.40 b = 96.28 c = 99.10 | a = 63.84 b = 97.30 c = 99.28 | a = 63.62 b = 96.68 c = 99.56 |
| Resolution, Å | 2.2 | 2.3 | 1.8 |
| Measured reflections | 116,338 | 78,582 | 682,554-λ1 |
| 588,438-λ2 | |||
| 553,320-λ3 | |||
| Independent reflections | 29,084 | 25,423 | 57,696-λ1 |
| 57,434-λ2 | |||
| 57,458-λ3 | |||
| R sym a, % | 10.1 | 6.3 | 7.0-λ1 |
| 7.7-λ2 | |||
| 8.1-λ3 | |||
| Completeness, % | 93.8 (94.0)† | 91.9 (90.3)† | 100.0 (99.9)†-λ1 |
| 99.8 (99.8)†-λ2 | |||
| 99.7 (99.7)†-λ3 | |||
| <I/σI> | 6.6 | 11.5 | 7.8-λ1 |
| 6.5-λ2 | |||
| 5.6-λ3 | |||
| Refinement statistics | |||
| R cryst b, % | 20.3 | 20.8 | 22.3 |
| R free c, % | 27.4 | 26.9 | 24.7 |
| Rmsdd bond lengths, Å | 0.02 | 0.03 | 0.02 |
| Rmsdd bond angles, deg | 1.69 | 2.19 | 1.56 |
| <B>, Å2 | |||
| protein | 16.8 | 22.0 | 14.5 |
| GMPPNP | 39.7 | 58.8 | n/a |
| water molecules | 32.7 | 41.6 | 39.2 |
| PDB code | 2Q9C | 2Q9B | 2Q9A |
†
Numbers in parentheses are the high-resolution bin.
a
R sym = Σ|I-<I>|Σ<I>, where I is the measured intensity of each reflection, and <I> is the intensity averaged from symmetry equivalents.
b
R cryst = Σ|Fo-Fc|/Σ|Fc|, where Fo and Fc are observed and calculated structure factors, respectively.
c
R free was calculated from a test set (8–10%) omitted from the refinement.
d
rmsd, root mean square deviation.