SPACI score report for 3r3r in ASTRAL 2.07:

PDB Entry: 3r3r
SPACI score: 0.85
AEROSPACI score: 0.85

Experiment type: XRAY
Resolution: 1.2
R-factor: 0.139
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.019
WCK2 WHAT_CHECK Ramachandran: 0.646
WCK3 WHAT_CHECK Chi angles: 1.298
WCK4 WHAT_CHECK Backbone: -0.515

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).