SPACI score report for 1qsu in ASTRAL 2.07:

PDB Entry: 1qsu
SPACI score: 0.51
AEROSPACI score: 0.51

Experiment type: XRAY
Resolution: 1.75
R-factor: 0.18
PCK1 PROCHECK Ramachandran: 2
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: -4.972
WCK2 WHAT_CHECK Ramachandran: -0.653
WCK3 WHAT_CHECK Chi angles: -4.818
WCK4 WHAT_CHECK Backbone: 0.261

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).