SPACI score report for 3k22 in ASTRAL 2.06:

PDB Entry: 3k22
SPACI score: 0.41
AEROSPACI score: 0.41

Experiment type: XRAY
Resolution: 2.1
R-factor: 0.214
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.662
WCK2 WHAT_CHECK Ramachandran: -1.121
WCK3 WHAT_CHECK Chi angles: 0.188
WCK4 WHAT_CHECK Backbone: 1.021

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).