SPACI score report for 1f4z in ASTRAL 1.61:

PDB Entry: 1f4z
SPACI score: 0.54
AEROSPACI score: 0.54

Experiment type: XRAY
Resolution: 1.8
R-factor: 0.142
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.059
WCK2 WHAT_CHECK Ramachandran: 0.068
WCK3 WHAT_CHECK Chi angles: -0.921
WCK4 WHAT_CHECK Backbone: 0.94

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).