SPACI score report for 3p3r in ASTRAL 2.03:

PDB Entry: 3p3r
SPACI score: 0.8
AEROSPACI score: 0.8

Experiment type: XRAY
Resolution: 1.25
R-factor: 0.156
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 1.288
WCK2 WHAT_CHECK Ramachandran: -1.236
WCK3 WHAT_CHECK Chi angles: -0.274
WCK4 WHAT_CHECK Backbone: 3.558

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).