SPACI score report for 1sq3 in ASTRAL 2.01:

PDB Entry: 1sq3
SPACI score: 0.33
AEROSPACI score: 0.33

Experiment type: XRAY
Resolution: 2.7
R-factor: 0.179
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: 0.1
WCK2 WHAT_CHECK Ramachandran: -0.93
WCK3 WHAT_CHECK Chi angles: -2.672
WCK4 WHAT_CHECK Backbone: 1.957

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).