SPACI score report for 2iy1 in ASTRAL 1.75:

PDB Entry: 2iy1
SPACI score: 0.34
AEROSPACI score: 0.34 (mutant; see below)

Experiment type: XRAY
Resolution: 2.46
R-factor: 0.251
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.864
WCK2 WHAT_CHECK Ramachandran: -0.972
WCK3 WHAT_CHECK Chi angles: -1.874
WCK4 WHAT_CHECK Backbone: 0.707

The AEROSPACI score for this entry is lower than the SPACI score because human-curated comments on the entry in SCOP contain the phrase mutant. The full comment is: "mutant; automatically matched to d1tgzb_; automatically matched to 2IY0 A:419-643; automated match to d2ckhb1; automated match to d2iy0a1"

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).