SPACI score report for 3kar in ASTRAL 2.03:

PDB Entry: 3kar
SPACI score: 0.33
AEROSPACI score: 0.33

Experiment type: XRAY
Resolution: 2.3
R-factor: 0.175
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -2.743
WCK2 WHAT_CHECK Ramachandran: -2.557
WCK3 WHAT_CHECK Chi angles: -4.634
WCK4 WHAT_CHECK Backbone: 0.381

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).