SPACI score report for 3kyu in ASTRAL 2.06:

PDB Entry: 3kyu
SPACI score: 0.97
AEROSPACI score: 0.97

Experiment type: XRAY
Resolution: 1.1
R-factor: 0.107
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 1.639
WCK2 WHAT_CHECK Ramachandran: 2.002
WCK3 WHAT_CHECK Chi angles: 0.902
WCK4 WHAT_CHECK Backbone: 4.308

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).