Table 1. Data Collection and Refinement Statistics.

	SBD1-Asn	SBD1(E184D)-Gln	SBD1-Arg
PDB ID	6FXG	8B5D	8B5E
wavelength	0.916	0.916	0.916
resolution range	44.2–1.7 (1.8–1.7)	47.77–2.0 (2.07–2.0)	38.66–1.6 (1.66–1.6)
space group	P21	P21	P1
a, b, c (Å)	41.87, 74.27, 110.24	42.61, 91.50, 57.91	34.67, 53.08, 54.08
α, β, γ (deg)	90.00, 90.55, 90.00	90.00, 107.81, 90.00	92.40, 92.37, 94.11
unique reflections	135138	27548	49268
completeness (%)	97.6 (95.6)	96.27 (96.63)	97.20 (95.88)
mean I/sigma (I)	15.2 (2.1)	8.8 (2.0)	12.1 (2.4)
R-meas	4.0 (10.1)	5.2 (25.8)	5.1 (22.5)
R-work (%)	13.6	19.88	14.69
R-free (%)	17.0	26.46	21.81
protein atoms	10455	3449	3589
ligand atoms	45	43	124
solvent atoms	952	215	266
RMS (bonds) (Å)	0.009	0.009	0.010
RMS (angles) (deg)	0.981	1.14	1.56
Ramachandran favored (%)	98.36	96.61	97.53
Ramachandran allowed (%)	1.64	3.16	2.02
Ramachandran outliers (%)	0	0.23	0.45
rotamer outliers (%)	0	0.83	2.62
clashscore	2.0	3.60	5.37
average B-factor	23	40.40	26.89
macromolecules	25.1	40.09	25.73
ligands	13	56.31	51.01
solvent	30.1	42.22	37.74