SPACI score report for 3l8b in ASTRAL 2.08:

PDB Entry: 3l8b
SPACI score: 0.39
AEROSPACI score: 0.39

Experiment type: XRAY
Resolution: 2.15
R-factor: 0.219
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.22
WCK2 WHAT_CHECK Ramachandran: -1.128
WCK3 WHAT_CHECK Chi angles: -0.974
WCK4 WHAT_CHECK Backbone: 0.431

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).