Table 1.
Selected crystallographic data and statistics
| Space group | P3 |
| Cell dimensions | |
| a, b, c (Å) | 156.4, 156.4, 34.6 |
| α, β, γ (°) | 90, 90, 120 |
| Resolution (Å) | 78.10 – 2.20 (2.32–2.20)a |
| Reflections (#) | 144 061 (20 896) |
| Rmerge (%)b | 6.1 (29.3) |
| I/σ(I) | 13.4 (2.9) |
| Completeness (%) | 99.4 (99.0) |
| Refinement | |
| Rwork/Rfree (%)c | 19.6/ 25.9 |
| Atoms (#) | |
| Protein | 6934 |
| RNA | 176 (8 nt) |
| Solvent | 242 (29 Zn2+ atoms) |
| Average B factor, protein (Å2) | 47.3 |
| Average B factor, RNA (Å2) | 58.8 |
| Root-mean-square deviations | |
| Bond lengths (Å) | 0.007 |
| Bond angles (°) | 1.003 |
| Ramachandran analysis | |
| Most favored (%) | 92.6 |
| Add. favored (%) | 7.3 |
| Gen. allowed (%) | 0.1 |
| Disallowed (%) | 0 |
aValues in parentheses are for the highest resolution shell.
bRmerge = ∑∑|Ihkl(j) − Ihkl)|/∑∑Ihkl, where Ihkl(j) is the observed intensity and Ihkl is the final average intensity value.
cRwork =∑||Fobs| − |Fcalc||/∑|Fobs| and Rfree =∑||Fobs| − |Fcalc||/∑|Fobs|, where all reflections belong to a test set of 5% randomly selected reflections.