SPACI score report for 1x1y in ASTRAL 2.07:

PDB Entry: 1x1y
SPACI score: 0.46
AEROSPACI score: 0.46 (mutant; see below)

Experiment type: XRAY
Resolution: 1.9
R-factor: 0.208
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.692
WCK2 WHAT_CHECK Ramachandran: -1.028
WCK3 WHAT_CHECK Chi angles: -0.26
WCK4 WHAT_CHECK Backbone: -0.375

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 d1b27a_; automatically matched to 1X1Y D:1-89; automated match to d1b27a_; automated match to d1b27d_"

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).