SPACI score report for 1p28 in ASTRAL 1.73:

PDB Entry: 1p28
SPACI score: 0.61
AEROSPACI score: 0.61

Experiment type: XRAY
Resolution: 1.7
R-factor: 0.145
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: 1.547
WCK2 WHAT_CHECK Ramachandran: 0.657
WCK3 WHAT_CHECK Chi angles: 0.2
WCK4 WHAT_CHECK Backbone: -1.83

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).