SPACI score report for 1w27 in ASTRAL 2.01:

PDB Entry: 1w27
SPACI score: 0.56
AEROSPACI score: 0.56

Experiment type: XRAY
Resolution: 1.7
R-factor: 0.168
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: -1.053
WCK2 WHAT_CHECK Ramachandran: -0.276
WCK3 WHAT_CHECK Chi angles: -0.649
WCK4 WHAT_CHECK Backbone: -0.915

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).