SPACI score report for 2wnu in ASTRAL 2.07:

PDB Entry: 2wnu
SPACI score: 0.35
AEROSPACI score: 0.35

Experiment type: XRAY
Resolution: 2.3
R-factor: 0.20064
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -0.909
WCK2 WHAT_CHECK Ramachandran: -1.411
WCK3 WHAT_CHECK Chi angles: -2.478
WCK4 WHAT_CHECK Backbone: -0.655

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).