SPACI score report for 1nan in ASTRAL 1.73:

PDB Entry: 1nan
SPACI score: 0.3
AEROSPACI score: 0.3

Experiment type: XRAY
Resolution: 2.3
R-factor: 0.229
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 1.649
WCK2 WHAT_CHECK Ramachandran: -0.46
WCK3 WHAT_CHECK Chi angles: -2.464
WCK4 WHAT_CHECK Backbone: -4.885

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).