SPACI score report for 3u0w in ASTRAL 2.06:

PDB Entry: 3u0w
SPACI score: 0.45
AEROSPACI score: 0.45

Experiment type: XRAY
Resolution: 2
R-factor: 0.191
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.43
WCK2 WHAT_CHECK Ramachandran: -1.593
WCK3 WHAT_CHECK Chi angles: -1.703
WCK4 WHAT_CHECK Backbone: 2.5

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).