SPACI score report for 3uok in ASTRAL 2.04:

PDB Entry: 3uok
SPACI score: 0.21
AEROSPACI score: 0.21

Experiment type: XRAY
Resolution: 2.95
R-factor: 0.223
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -1.828
WCK2 WHAT_CHECK Ramachandran: -3.219
WCK3 WHAT_CHECK Chi angles: -2.579
WCK4 WHAT_CHECK Backbone: 1.72

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).