SPACI score report for 2j55 in ASTRAL 1.75:

PDB Entry: 2j55
SPACI score: 0.43
AEROSPACI score: 0.43

Experiment type: XRAY
Resolution: 2.15
R-factor: 0.192
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -1.304
WCK2 WHAT_CHECK Ramachandran: -2.151
WCK3 WHAT_CHECK Chi angles: -2.375
WCK4 WHAT_CHECK Backbone: -0.947

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).