SPACI score report for 3pqk in ASTRAL 2.06:

PDB Entry: 3pqk
SPACI score: 0.42
AEROSPACI score: 0.42

Experiment type: XRAY
Resolution: 2.09
R-factor: 0.211
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: -0.766
WCK2 WHAT_CHECK Ramachandran: -0.823
WCK3 WHAT_CHECK Chi angles: -0.493
WCK4 WHAT_CHECK Backbone: 4.106

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).