SPACI score report for 1g6r in ASTRAL 2.06:

PDB Entry: 1g6r
SPACI score: 0.12
AEROSPACI score: 0.12

Experiment type: XRAY
Resolution: 2.8
R-factor: 0.298
PCK1 PROCHECK Ramachandran: 2
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -2.292
WCK2 WHAT_CHECK Ramachandran: -5.845
WCK3 WHAT_CHECK Chi angles: -4.127
WCK4 WHAT_CHECK Backbone: -1.253

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).