SPACI score report for 3w9c in ASTRAL 2.07:

PDB Entry: 3w9c
SPACI score: 0.33
AEROSPACI score: 0.33

Experiment type: XRAY
Resolution: 2.5
R-factor: 0.188
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.446
WCK2 WHAT_CHECK Ramachandran: -1.58
WCK3 WHAT_CHECK Chi angles: -3.102
WCK4 WHAT_CHECK Backbone: 2.474

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).