SPACI score report for 3sge in ASTRAL 2.06:

PDB Entry: 3sge
SPACI score: 0.47
AEROSPACI score: 0.47

Experiment type: XRAY
Resolution: 1.89
R-factor: 0.181
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.048
WCK2 WHAT_CHECK Ramachandran: -1.698
WCK3 WHAT_CHECK Chi angles: -2.231
WCK4 WHAT_CHECK Backbone: 2.015

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).