SPACI score report for 3cga in ASTRAL 2.08:

PDB Entry: 3cga
SPACI score: 0.3
AEROSPACI score: 0.3

Experiment type: XRAY
Resolution: 2.03
R-factor: 0.255
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -2.249
WCK2 WHAT_CHECK Ramachandran: -5.3
WCK3 WHAT_CHECK Chi angles: -5.513
WCK4 WHAT_CHECK Backbone: -2.103

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).