SPACI score report for 1u4o in ASTRAL 2.07:

PDB Entry: 1u4o
SPACI score: 0.61
AEROSPACI score: 0.61

Experiment type: XRAY
Resolution: 1.7
R-factor: 0.147
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: 0.797
WCK2 WHAT_CHECK Ramachandran: -0.424
WCK3 WHAT_CHECK Chi angles: -0.572
WCK4 WHAT_CHECK Backbone: 3.452

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).