SPACI score report for 1xl6 in ASTRAL 2.07:

PDB Entry: 1xl6
SPACI score: 0.17
AEROSPACI score: 0.17

Experiment type: XRAY
Resolution: 2.85
R-factor: 0.27
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -1.502
WCK2 WHAT_CHECK Ramachandran: -4.744
WCK3 WHAT_CHECK Chi angles: -2.94
WCK4 WHAT_CHECK Backbone: 1.623

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).