SPACI score report for 1pn1 in ASTRAL 2.06:

PDB Entry: 1pn1
SPACI score: 0.7
AEROSPACI score: 0.7

Experiment type: XRAY
Resolution: 1.4
R-factor: 0.18
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: -1.102
WCK2 WHAT_CHECK Ramachandran: -0.298
WCK3 WHAT_CHECK Chi angles: 0.341
WCK4 WHAT_CHECK Backbone: 0.342

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).