SPACI score report for 3zlw in ASTRAL 2.04:

PDB Entry: 3zlw
SPACI score: 0.42
AEROSPACI score: 0.42

Experiment type: XRAY
Resolution: 2.12
R-factor: 0.198
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.549
WCK2 WHAT_CHECK Ramachandran: -0.805
WCK3 WHAT_CHECK Chi angles: -0.285
WCK4 WHAT_CHECK Backbone: 3.662

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).