SPACI score report for 2cz6 in ASTRAL 2.06:

PDB Entry: 2cz6
SPACI score: 0.67
AEROSPACI score: 0.67

Experiment type: XRAY
Resolution: 1.5
R-factor: 0.153
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.836
WCK2 WHAT_CHECK Ramachandran: -0.348
WCK3 WHAT_CHECK Chi angles: 1.245
WCK4 WHAT_CHECK Backbone: 1.138

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).