SPACI score report for 1w6p in ASTRAL 1.71:

PDB Entry: 1w6p
SPACI score: 0.49
AEROSPACI score: 0.49

Experiment type: XRAY
Resolution: 1.8
R-factor: 0.216
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.89
WCK2 WHAT_CHECK Ramachandran: 0.216
WCK3 WHAT_CHECK Chi angles: 1.333
WCK4 WHAT_CHECK Backbone: -2.082

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).