SPACI score report for 1g6t in ASTRAL 1.71:

PDB Entry: 1g6t
SPACI score: 0.61
AEROSPACI score: 0.61

Experiment type: XRAY
Resolution: 1.6
R-factor: 0.155
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 1.135
WCK2 WHAT_CHECK Ramachandran: -0.229
WCK3 WHAT_CHECK Chi angles: 1.134
WCK4 WHAT_CHECK Backbone: -6.217

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).