SPACI score report for 3om4 in ASTRAL 2.05:

PDB Entry: 3om4
SPACI score: 0.51
AEROSPACI score: 0.51

Experiment type: XRAY
Resolution: 1.75
R-factor: 0.202
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.223
WCK2 WHAT_CHECK Ramachandran: -1.334
WCK3 WHAT_CHECK Chi angles: -0.017
WCK4 WHAT_CHECK Backbone: -1.825

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).