SPACI score report for 3kwy in ASTRAL 2.08:

PDB Entry: 3kwy
SPACI score: 0.41
AEROSPACI score: 0.41

Experiment type: XRAY
Resolution: 2.3
R-factor: 0.186
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: 0.191
WCK2 WHAT_CHECK Ramachandran: -0.909
WCK3 WHAT_CHECK Chi angles: -1.585
WCK4 WHAT_CHECK Backbone: 5.555

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).