SPACI score report for 4b41 in ASTRAL 2.07:

PDB Entry: 4b41
SPACI score: 0.85
AEROSPACI score: 0.85

Experiment type: XRAY
Resolution: 1.19
R-factor: 0.1374
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.305
WCK2 WHAT_CHECK Ramachandran: -1.249
WCK3 WHAT_CHECK Chi angles: 0.952
WCK4 WHAT_CHECK Backbone: 2.826

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).