SPACI score report for 1k4s in ASTRAL 1.67:

PDB Entry: 1k4s
SPACI score: 0.15
AEROSPACI score: 0.15

Experiment type: XRAY
Resolution: 3.2
R-factor: 0.217
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -3.342
WCK2 WHAT_CHECK Ramachandran: -5.211
WCK3 WHAT_CHECK Chi angles: -4.199
WCK4 WHAT_CHECK Backbone: -6.903

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).