SPACI score report for 15c8 in ASTRAL 1.71:

PDB Entry: 15c8
SPACI score: 0.3
AEROSPACI score: 0.3

Experiment type: XRAY
Resolution: 2.5
R-factor: 0.19
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.713
WCK2 WHAT_CHECK Ramachandran: -1.633
WCK3 WHAT_CHECK Chi angles: -3.862
WCK4 WHAT_CHECK Backbone: -6.026

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).