SPACI score report for 4f15 in ASTRAL 2.06:

PDB Entry: 4f15
SPACI score: 0.16
AEROSPACI score: 0.16

Experiment type: XRAY
Resolution: 2.81
R-factor: 0.235
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 4
WCK1 WHAT_CHECK Packing: -3.655
WCK2 WHAT_CHECK Ramachandran: -5.426
WCK3 WHAT_CHECK Chi angles: -6.371
WCK4 WHAT_CHECK Backbone: -2.784

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).