SPACI score report for 1b1z in ASTRAL 1.59:

PDB Entry: 1b1z
SPACI score: 0.29
AEROSPACI score: 0.29

Experiment type: XRAY
Resolution: 2.57
R-factor: 0.194
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -2.316
WCK2 WHAT_CHECK Ramachandran: -1.92
WCK3 WHAT_CHECK Chi angles: -2.408
WCK4 WHAT_CHECK Backbone: -1.151

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).