SPACI score report for 1i73 in ASTRAL 1.75:

PDB Entry: 1i73
SPACI score: 0.84
AEROSPACI score: 0.84

Experiment type: XRAY
Resolution: 1.4
R-factor: 0.138
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.655
WCK2 WHAT_CHECK Ramachandran: 0.018
WCK3 WHAT_CHECK Chi angles: 0.248
WCK4 WHAT_CHECK Backbone: -0.106

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).