SPACI score report for 2zsx in ASTRAL 2.06:

PDB Entry: 2zsx
SPACI score: 0.8
AEROSPACI score: 0.8

Experiment type: XRAY
Resolution: 1.21
R-factor: 0.171
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.112
WCK2 WHAT_CHECK Ramachandran: -0.214
WCK3 WHAT_CHECK Chi angles: -0.263
WCK4 WHAT_CHECK Backbone: 1.37

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).