SPACI score report for 4ek3 in ASTRAL 2.07:

PDB Entry: 4ek3
SPACI score: 0.72
AEROSPACI score: 0.72

Experiment type: XRAY
Resolution: 1.34
R-factor: 0.179
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.052
WCK2 WHAT_CHECK Ramachandran: 0.03
WCK3 WHAT_CHECK Chi angles: -0.349
WCK4 WHAT_CHECK Backbone: 3.853

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).