SPACI score report for 1rz8 in ASTRAL 2.05:

PDB Entry: 1rz8
SPACI score: 0.32
AEROSPACI score: 0.32

Experiment type: XRAY
Resolution: 2.3
R-factor: 0.212
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -0.358
WCK2 WHAT_CHECK Ramachandran: -1.659
WCK3 WHAT_CHECK Chi angles: -2.209
WCK4 WHAT_CHECK Backbone: 0.155

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).