SPACI score report for 3n40 in ASTRAL 2.06:

PDB Entry: 3n40
SPACI score: 0.37
AEROSPACI score: 0.37

Experiment type: XRAY
Resolution: 2.17
R-factor: 0.209
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.608
WCK2 WHAT_CHECK Ramachandran: -2.061
WCK3 WHAT_CHECK Chi angles: -2.256
WCK4 WHAT_CHECK Backbone: 1.314

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).