SPACI score report for 1x12 in ASTRAL 2.07:

PDB Entry: 1x12
SPACI score: 0.43
AEROSPACI score: 0.43

Experiment type: XRAY
Resolution: 2
R-factor: 0.214
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.811
WCK2 WHAT_CHECK Ramachandran: 0.346
WCK3 WHAT_CHECK Chi angles: 0.51
WCK4 WHAT_CHECK Backbone: 0.114

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).