SPACI score report for 4itt in ASTRAL 2.05:

PDB Entry: 4itt
SPACI score: 0.45
AEROSPACI score: 0.45

Experiment type: XRAY
Resolution: 2.1
R-factor: 0.178
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: 0.867
WCK2 WHAT_CHECK Ramachandran: -1.053
WCK3 WHAT_CHECK Chi angles: -1.702
WCK4 WHAT_CHECK Backbone: 6.155

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).