Table 1. Crystallographic data collection and refinement statistics.

	SAYabJ
Data collection
Beamline	PAL-5C
Wavelength (Å)	0.98
Resolution range1 (Å)	40.00–1.75 (1.78–1.75)
Space group	P21
Unit cell parameters (Å)	a = 47.12
	b = 83.22
	c = 89.36
Observations (total/unique)	277503/133402
Completeness (%)	97.4 (95.1)
CC1/2	0.98 (0.92)
Rsym2	5.6 (20.4)
I/sigma	42.6 (6.9)
Refinement
Rwork3 (%)	17.4
Rfree3 (%)	21.2
Protein atoms	5838
Water molecules	499
Average B value (Å2)	25.0
r.m.s.d. bond (Å)	0.006
r.m.s.d. angle (°)	0.801
Ramachandran analysis (%)
Favored region	95.6
Allowed region	4.4
Outliers	0.0

¹Numbers in parentheses indicate the statistics for the last resolution shell.

²${\text{R}}_{\text{sym}}={\displaystyle \sum (\left|I_{hkl}-<I_{hkl}>\right|}/{\displaystyle \sum <I_{hkl}>}$, where I_hkl = single value of measured intensity of hkl reflection, and <I_hkl> = mean of all measured value intensity of hkl reflection.

³${\text{R}}_{\text{work}}={\displaystyle \sum \left|F_{obs}-F_{calc}\right|}/{\displaystyle \sum F_{obs}}$, where F_obs = observed structure factor amplitude, and F_calc = structure factor calculated from model. R_free is computed in the same manner as R_work, but from a test set containing 5% of data excluded from the refinement calculation.