SPACI score report for 2g3k in ASTRAL 2.08:

PDB Entry: 2g3k
SPACI score: 0.2
AEROSPACI score: 0.2

Experiment type: XRAY
Resolution: 3.05
R-factor: 0.216
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.309
WCK2 WHAT_CHECK Ramachandran: -3.69
WCK3 WHAT_CHECK Chi angles: -5.15
WCK4 WHAT_CHECK Backbone: 0.223

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).