SPACI score report for 3bwb in ASTRAL 2.06:

PDB Entry: 3bwb
SPACI score: 0.34
AEROSPACI score: 0.34

Experiment type: XRAY
Resolution: 2.5
R-factor: 0.201
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -2.281
WCK2 WHAT_CHECK Ramachandran: -2.077
WCK3 WHAT_CHECK Chi angles: -1.572
WCK4 WHAT_CHECK Backbone: 2.19

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).