Table 1. Data-collection and refinement statistics.

Values in parentheses are for the highest resolution shell.

Data collection
X-ray wavelength (Å)	1.0000
Space group	P41212
Unit-cell parameters (Å)	a = b = 94.36, c = 197.42
Resolution range (Å)	20.0–2.30 (2.38–2.30)
Total/unique reflections	400106/40500
Completeness (%)	100 (100)
I/σ(I)	36.0 (5.1)
Rmerge†	0.089 (0.44)
Model refinement
Rwork/Rfree‡	0.215 / 0.277
No. of non-H atoms/average B factor (Å2)
Protein	4423/36.0
Water	489/45.9
Phosphate ions	20/52.4
R.m.s. deviations from ideal geometry
Bond lengths (Å)	0.010
Bond angles (°)	1.31
Ramachandran plot
Most favourable (%)	92.3
Allowed (%)	7.1
Generously allowed (%)	0.4
Disallowed (%)	0.2

^† R _merge = , where I(hkl) is the intensity of reflection hkl, is the sum over all reflections and is the sum over i measurements of reflection hkl.

^‡ R = , where R _free is calculated for a randomly chosen 10% of reflections which were not used for structure refinement and R _work is calculated for the remaining reflections.