Table 1. Statistics for crystallographic structure determination.

Values in parentheses are for the outermost resolution shell.

Data collection
Data-collection site	ESRF ID14.1
Detector	MAR CCD
Wavelength (Å)	0.93
Resolution range (Å)	30–1.9 (1.97–1.90)
Redundancy	3.6 (2.9)
Completeness (%)	99.3 (95.6)
Average I/σ(I)	31.6 (2.9)
Rmerge†	0.037 (0.275)
Refinement statistics
No. of reflections used	75428
Total No. of atoms	6201
No. of water molecules	471
Resolution range (Å)	29.4-1.9
R factor‡ (Rwork/Rfree)	20.7/23.9
R.m.s. bond-length deviation (Å)	0.013
R.m.s. bond-angle deviation (°)	1.32
Mean B factors (Å2)
Main chain	23.2
Side chain and water	27.3
GMP	22.8
All atoms	25.6

^† R _merge = .

^‡ R factor = _.