SPACI score report for 1t8b in ASTRAL 2.06:

PDB Entry: 1t8b
SPACI score: 0.17
AEROSPACI score: 0.17

Experiment type: XRAY
Resolution: 3.23
R-factor: 0.216
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.22
WCK2 WHAT_CHECK Ramachandran: -5.982
WCK3 WHAT_CHECK Chi angles: -6.166
WCK4 WHAT_CHECK Backbone: -0.318

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).