SPACI score report for 1kz9 in ASTRAL 2.07:

PDB Entry: 1kz9
SPACI score: 0.27
AEROSPACI score: 0.27

Experiment type: XRAY
Resolution: 3.1
R-factor: 0.194
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.014
WCK2 WHAT_CHECK Ramachandran: -2.618
WCK3 WHAT_CHECK Chi angles: -0.679
WCK4 WHAT_CHECK Backbone: 4.406

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).