SPACI score report for 1a4p in ASTRAL 1.55:

PDB Entry: 1a4p
SPACI score: 0.33
AEROSPACI score: 0.33

Experiment type: XRAY
Resolution: 2.25
R-factor: 0.246
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.345
WCK2 WHAT_CHECK Ramachandran: -0.815
WCK3 WHAT_CHECK Chi angles: -0.836
WCK4 WHAT_CHECK Backbone: 1.241

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).