SPACI score report for 2g4x in ASTRAL 2.07:

PDB Entry: 2g4x
SPACI score: 0.48
AEROSPACI score: 0.48

Experiment type: XRAY
Resolution: 1.95
R-factor: 0.176
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.484
WCK2 WHAT_CHECK Ramachandran: -2.126
WCK3 WHAT_CHECK Chi angles: -1.275
WCK4 WHAT_CHECK Backbone: 2.446

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).