SPACI score report for 1sf3 in ASTRAL 2.04:

PDB Entry: 1sf3
SPACI score: 0.98
AEROSPACI score: 0.98

Experiment type: XRAY
Resolution: 1.05
R-factor: 0.119
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.684
WCK2 WHAT_CHECK Ramachandran: 0.291
WCK3 WHAT_CHECK Chi angles: 0.153
WCK4 WHAT_CHECK Backbone: 0.775

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).