Table 2. Summary of refinement statistics.

Resolution range (Å)	49.39–1.70
Data set used in refinement	Native
No. of reflections (total/test)	35346/1773
Rcryst†	0.169
Rfree‡	0.221
R.m.s.d. bonds (Å)	0.017
R.m.s.d. angles (°)	1.642
Average B factor (Å2)	21.98
No. of water molecules	357
No. of ions	1 Mg2+
Ramachandran plot, residues in
Most favorable region (%)	90.9
Additional allowed region (%)	8.8
Generously allowed region(%)	0.3
Disallowed region (%)	0.0

^† R _cryst = , where F _obs and F _calc are the observed and calculated structure-factor amplitudes, respectively.

^‡ R _free was calculated as R _cryst using 5.0% of the randomly selected unique reflections that were omitted from structure refinement.