SPACI score report for 1g6x in ASTRAL 2.08:

PDB Entry: 1g6x
SPACI score: 1.2
AEROSPACI score: 1.2

Experiment type: XRAY
Resolution: 0.86
R-factor: 0.107
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -4.487
WCK2 WHAT_CHECK Ramachandran: -0.411
WCK3 WHAT_CHECK Chi angles: 1.441
WCK4 WHAT_CHECK Backbone: 2.08

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).