SPACI score report for 3o6z in ASTRAL 2.08:

PDB Entry: 3o6z
SPACI score: 0.37
AEROSPACI score: 0.37

Experiment type: XRAY
Resolution: 2.05
R-factor: 0.238
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.137
WCK2 WHAT_CHECK Ramachandran: -2.145
WCK3 WHAT_CHECK Chi angles: -1.855
WCK4 WHAT_CHECK Backbone: 2.37

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).