SPACI score report for 2pr4 in ASTRAL 2.07:

PDB Entry: 2pr4
SPACI score: 0.39
AEROSPACI score: 0.39

Experiment type: XRAY
Resolution: 2.05
R-factor: 0.24
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.213
WCK2 WHAT_CHECK Ramachandran: -0.628
WCK3 WHAT_CHECK Chi angles: -2.104
WCK4 WHAT_CHECK Backbone: 0.507

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).