SPACI score report for 3g30 in ASTRAL 2.06:

PDB Entry: 3g30
SPACI score: 0.49
AEROSPACI score: 0.49

Experiment type: XRAY
Resolution: 1.8
R-factor: 0.21
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.679
WCK2 WHAT_CHECK Ramachandran: -0.654
WCK3 WHAT_CHECK Chi angles: -0.464
WCK4 WHAT_CHECK Backbone: 0.504

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).