SPACI score report for 2nug in ASTRAL 1.75:

PDB Entry: 2nug
SPACI score: 0.69
AEROSPACI score: 0.69

Experiment type: XRAY
Resolution: 1.7
R-factor: 0.194
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.568
WCK2 WHAT_CHECK Ramachandran: 0.415
WCK3 WHAT_CHECK Chi angles: 1.655
WCK4 WHAT_CHECK Backbone: 0.736

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).