SPACI score report for 1bkb in ASTRAL 2.08:

PDB Entry: 1bkb
SPACI score: 0.5
AEROSPACI score: 0.5 (mutant; see below)

Experiment type: XRAY
Resolution: 1.75
R-factor: 0.214
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -0.031
WCK2 WHAT_CHECK Ramachandran: -0.512
WCK3 WHAT_CHECK Chi angles: 2.375
WCK4 WHAT_CHECK Backbone: 0.763

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: "CASP3; mutant"

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).