SPACI score report for 1xa0 in ASTRAL 1.73:

PDB Entry: 1xa0
SPACI score: 0.22
AEROSPACI score: 0.22

Experiment type: XRAY
Resolution: 2.8
R-factor: 0.218
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.05
WCK2 WHAT_CHECK Ramachandran: -2.87
WCK3 WHAT_CHECK Chi angles: -4.049
WCK4 WHAT_CHECK Backbone: -7.591

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).