SPACI score report for 4bgw in ASTRAL 2.07:

PDB Entry: 4bgw
SPACI score: 0.31
AEROSPACI score: 0.31

Experiment type: XRAY
Resolution: 2.48
R-factor: 0.21035
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.419
WCK2 WHAT_CHECK Ramachandran: -2.069
WCK3 WHAT_CHECK Chi angles: -1.464
WCK4 WHAT_CHECK Backbone: 1.989

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).