Table 1. Data-collection and refinement statistics for SiaPG.

Values in parentheses are for the highest resolution shell.

Data collection
Space group	P3121
a, b, c (Å)	131.16, 131.16, 181.17
α, β, γ (°)	90, 90, 120
Resolution range (Å)	56.80–2.10 (2.14–2.10)
No. of reflections	1550917 (57812)
No. of unique reflections	101168 (5048)
〈I/σ(I)〉	18.5 (2.4)
R r.i.m. †	0.033 (0.338)
Completeness (%)	96.0 (97.3)
CC1/2	0.99 (0.68)
Average multiplicity	15.3 (11.5)
Wilson B factor (Å2)	29.8
Structure refinement
Resolution range (Å)	56.80–2.10
R factor‡ (%)/R free § (%)	17.3/21.6
No. of protein atoms	11623
No. of water atoms	852
R.m.s.d.¶
Bond lengths (Å)	0.007
Bond angles (°)	1.403
Average B factor (Å2)	34.5
Ramachandran plot††
Favored regions (%)	96.0
Allowed regions (%)	4.0
Outliers (%)	0
PDB code	8gn6

^†Estimated R _r.i.m. = R _merge[N/(N−1)]^1/2, where N is the data multiplicity.

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

^§ R _free was calculated using 5% of the data that were excluded from refinement.

^¶R.m.s.d. from ideal values.

^††Categories were defined by MolProbity.