SPACI score report for 1z0w in ASTRAL 2.05:

PDB Entry: 1z0w
SPACI score: 0.84
AEROSPACI score: 0.84

Experiment type: XRAY
Resolution: 1.2
R-factor: 0.137
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.239
WCK2 WHAT_CHECK Ramachandran: 0.184
WCK3 WHAT_CHECK Chi angles: -0.378
WCK4 WHAT_CHECK Backbone: 1.221

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).