SPACI score report for 1k26 in ASTRAL 2.07:

PDB Entry: 1k26
SPACI score: 0.51
AEROSPACI score: 0.51 (mutant; see below)

Experiment type: XRAY
Resolution: 1.85
R-factor: 0.183
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.53
WCK2 WHAT_CHECK Ramachandran: -0.085
WCK3 WHAT_CHECK Chi angles: -0.154
WCK4 WHAT_CHECK Backbone: 3.347

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: "structural genomics protein; complexed with acy, cry, ir3, ni, so4; 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).