SPACI score report for 1a1i in ASTRAL 1.55:

PDB Entry: 1a1i
SPACI score: 0.59
AEROSPACI score: 0.59

Experiment type: XRAY
Resolution: 1.6
R-factor: 0.191
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.718
WCK2 WHAT_CHECK Ramachandran: 0.316
WCK3 WHAT_CHECK Chi angles: 1.526
WCK4 WHAT_CHECK Backbone: 0.925

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).