SPACI score report for 3i54 in ASTRAL 2.04:

PDB Entry: 3i54
SPACI score: 0.36
AEROSPACI score: 0.36

Experiment type: XRAY
Resolution: 2.2
R-factor: 0.213
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.145
WCK2 WHAT_CHECK Ramachandran: -2.225
WCK3 WHAT_CHECK Chi angles: -2.123
WCK4 WHAT_CHECK Backbone: 2.983

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).