SPACI score report for 3p73 in ASTRAL 2.01:

PDB Entry: 3p73
SPACI score: 0.75
AEROSPACI score: 0.75

Experiment type: XRAY
Resolution: 1.32
R-factor: 0.159
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.857
WCK2 WHAT_CHECK Ramachandran: 1.763
WCK3 WHAT_CHECK Chi angles: 0.221
WCK4 WHAT_CHECK Backbone: 0.782

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).