SPACI score report for 4i8j in ASTRAL 2.07:

PDB Entry: 4i8j
SPACI score: 1.22
AEROSPACI score: 1.22

Experiment type: XRAY
Resolution: 0.87
R-factor: 0.092
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 3.619
WCK2 WHAT_CHECK Ramachandran: -1.137
WCK3 WHAT_CHECK Chi angles: 0.63
WCK4 WHAT_CHECK Backbone: 3.652

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).