SPACI score report for 1zns in ASTRAL 2.08:

PDB Entry: 1zns
SPACI score: 0.26
AEROSPACI score: 0.26

Experiment type: XRAY
Resolution: 2.5
R-factor: 0.241
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -1.604
WCK2 WHAT_CHECK Ramachandran: -2.214
WCK3 WHAT_CHECK Chi angles: -2.877
WCK4 WHAT_CHECK Backbone: 0.49

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).