SPACI score report for 3iga in ASTRAL 2.06:

PDB Entry: 3iga
SPACI score: 0.26
AEROSPACI score: 0.26

Experiment type: XRAY
Resolution: 2.75
R-factor: 0.242
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.033
WCK2 WHAT_CHECK Ramachandran: -2.372
WCK3 WHAT_CHECK Chi angles: -2.25
WCK4 WHAT_CHECK Backbone: 0.667

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).