SPACI score report for 1szn in ASTRAL 1.71:

PDB Entry: 1szn
SPACI score: 0.63
AEROSPACI score: 0.63

Experiment type: XRAY
Resolution: 1.54
R-factor: 0.153
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.694
WCK2 WHAT_CHECK Ramachandran: -0.676
WCK3 WHAT_CHECK Chi angles: 0.095
WCK4 WHAT_CHECK Backbone: -5.772

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).