SPACI score report for 3u8i in ASTRAL 2.07:

PDB Entry: 3u8i
SPACI score: 0.91
AEROSPACI score: 0.91

Experiment type: XRAY
Resolution: 1.1
R-factor: 0.165
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: -2.319
WCK2 WHAT_CHECK Ramachandran: 0.017
WCK3 WHAT_CHECK Chi angles: -0.849
WCK4 WHAT_CHECK Backbone: 2.869

Note: Here are links to pages about PROCHECK and WHAT_CHECK.

Here is the full WHAT_CHECK report on this protein (linked from the WHAT_CHECK site).