SPACI score report for 1xok in ASTRAL 2.07:

PDB Entry: 1xok
SPACI score: 0.14
AEROSPACI score: 0.14

Experiment type: XRAY
Resolution: 3
R-factor: 0.251
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 4
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -5.073
WCK2 WHAT_CHECK Ramachandran: -2.694
WCK3 WHAT_CHECK Chi angles: -3.913
WCK4 WHAT_CHECK Backbone: 0.248

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).