SPACI score report for 1ykh in ASTRAL 2.08:

PDB Entry: 1ykh
SPACI score: 0.19
AEROSPACI score: 0.19 (mutant; see below)

Experiment type: XRAY
Resolution: 3
R-factor: 0.257
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.931
WCK2 WHAT_CHECK Ramachandran: -4.568
WCK3 WHAT_CHECK Chi angles: -3.105
WCK4 WHAT_CHECK Backbone: 1.941

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 1YKE A:108-205; automated match to d1ykea1"

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).