SPACI score report for 1zm4 in ASTRAL 2.08:

PDB Entry: 1zm4
SPACI score: 0.19
AEROSPACI score: 0.19

Experiment type: XRAY
Resolution: 2.9
R-factor: 0.246
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -1.42
WCK2 WHAT_CHECK Ramachandran: -3.984
WCK3 WHAT_CHECK Chi angles: -2.779
WCK4 WHAT_CHECK Backbone: -0.636

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).