SPACI score report for 1kx5 in ASTRAL 1.65:

PDB Entry: 1kx5
SPACI score: 0.45
AEROSPACI score: 0.45

Experiment type: XRAY
Resolution: 1.94
R-factor: 0.208
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -3.083
WCK2 WHAT_CHECK Ramachandran: -0.479
WCK3 WHAT_CHECK Chi angles: 0.507
WCK4 WHAT_CHECK Backbone: -2.119

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).