SPACI score report for 1tn3 in ASTRAL 1.71:

PDB Entry: 1tn3
SPACI score: 0.36
AEROSPACI score: 0.36

Experiment type: XRAY
Resolution: 2
R-factor: 0.218
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.194
WCK2 WHAT_CHECK Ramachandran: -1.834
WCK3 WHAT_CHECK Chi angles: -2.659
WCK4 WHAT_CHECK Backbone: -9.406

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).