SPACI score report for 1y4g in ASTRAL 1.71:

PDB Entry: 1y4g
SPACI score: 0.46
AEROSPACI score: 0.46

Experiment type: XRAY
Resolution: 1.91
R-factor: 0.203
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: 0.723
WCK2 WHAT_CHECK Ramachandran: 0.389
WCK3 WHAT_CHECK Chi angles: -1.399
WCK4 WHAT_CHECK Backbone: -4.428

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).