SPACI score report for 2zky in ASTRAL 2.07:

PDB Entry: 2zky
SPACI score: 0.37
AEROSPACI score: 0.37

Experiment type: XRAY
Resolution: 2.4
R-factor: 0.189
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 1.863
WCK2 WHAT_CHECK Ramachandran: -2.037
WCK3 WHAT_CHECK Chi angles: -1.052
WCK4 WHAT_CHECK Backbone: 1.755

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).