SPACI score report for 4h0n in ASTRAL 2.06:

PDB Entry: 4h0n
SPACI score: 0.29
AEROSPACI score: 0.29

Experiment type: XRAY
Resolution: 2.71
R-factor: 0.204
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -2.218
WCK2 WHAT_CHECK Ramachandran: -0.441
WCK3 WHAT_CHECK Chi angles: -2.964
WCK4 WHAT_CHECK Backbone: 2.905

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).