SPACI score report for 1yxb in ASTRAL 2.07:

PDB Entry: 1yxb
SPACI score: 0.27
AEROSPACI score: 0.27

Experiment type: XRAY
Resolution: 2.6
R-factor: 0.25
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.344
WCK2 WHAT_CHECK Ramachandran: -0.693
WCK3 WHAT_CHECK Chi angles: -1.433
WCK4 WHAT_CHECK Backbone: -0.083

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).