SPACI score report for 1g4y in ASTRAL 2.08:

PDB Entry: 1g4y
SPACI score: 0.54
AEROSPACI score: 0.54

Experiment type: XRAY
Resolution: 1.6
R-factor: 0.221
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.025
WCK2 WHAT_CHECK Ramachandran: -0.061
WCK3 WHAT_CHECK Chi angles: -1.819
WCK4 WHAT_CHECK Backbone: 5.048

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).