SPACI score report for 1y6k in ASTRAL 2.08:

PDB Entry: 1y6k
SPACI score: 0.28
AEROSPACI score: 0.28 (mutant; see below)

Experiment type: XRAY
Resolution: 2.52
R-factor: 0.229
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.532
WCK2 WHAT_CHECK Ramachandran: -3.763
WCK3 WHAT_CHECK Chi angles: -2.89
WCK4 WHAT_CHECK Backbone: -0.974

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 d1j7vr1; automatically matched to d1lqsr2; automatically matched to d2ilk__; automated match to d1lqsr1; automated match to d1lqsr2; automated match to d2ilk__"

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).