SPACI score report for 1pzn in ASTRAL 1.71:

PDB Entry: 1pzn
SPACI score: 0.2
AEROSPACI score: -1.8 (disorder; see below)

Experiment type: XRAY
Resolution: 2.85
R-factor: 0.257
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.021
WCK2 WHAT_CHECK Ramachandran: -4.165
WCK3 WHAT_CHECK Chi angles: -3.054
WCK4 WHAT_CHECK Backbone: -5.428

The AEROSPACI score for this entry is lower than the SPACI score because human-curated comments on the entry in SCOP contain the phrase disorder. The full comment is: "disordered in the other chains of this PDB entry"

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).