SPACI score report for 1tgg in ASTRAL 2.07:

PDB Entry: 1tgg
SPACI score: 0.43
AEROSPACI score: 0.43

Experiment type: XRAY
Resolution: 2
R-factor: 0.233
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: -3.457
WCK2 WHAT_CHECK Ramachandran: -3.549
WCK3 WHAT_CHECK Chi angles: 3.085
WCK4 WHAT_CHECK Backbone: 2.938

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).