SPACI score report for 1a4x in ASTRAL 1.69:

PDB Entry: 1a4x
SPACI score: 0.37
AEROSPACI score: 0.37

Experiment type: XRAY
Resolution: 2.3
R-factor: 0.211
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.461
WCK2 WHAT_CHECK Ramachandran: -0.631
WCK3 WHAT_CHECK Chi angles: 1.386
WCK4 WHAT_CHECK Backbone: -5.516

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).