SPACI score report for 1zhi in ASTRAL 2.08:

PDB Entry: 1zhi
SPACI score: 0.25
AEROSPACI score: 0.25 (mutant; see below)

Experiment type: XRAY
Resolution: 2.7
R-factor: 0.234
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.666
WCK2 WHAT_CHECK Ramachandran: -2.205
WCK3 WHAT_CHECK Chi angles: -3.216
WCK4 WHAT_CHECK Backbone: 2.67

The AEROSPACI score for this entry is lower than the SPACI score because human-curated comments on the entry in SCOPe contain the phrase mutant. The full comment is: "mutant; automatically matched to d1m4za_; automated match to d1m4zb_"

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).