SPACI score report for 3rxs in ASTRAL 2.06:

PDB Entry: 3rxs
SPACI score: 0.57
AEROSPACI score: 0.57

Experiment type: XRAY
Resolution: 1.74
R-factor: 0.163
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 3.576
WCK2 WHAT_CHECK Ramachandran: -1.077
WCK3 WHAT_CHECK Chi angles: -0.566
WCK4 WHAT_CHECK Backbone: 3.556

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).