SPACI score report for 4am1 in ASTRAL 2.08:

PDB Entry: 4am1
SPACI score: 0.79
AEROSPACI score: 0.79

Experiment type: XRAY
Resolution: 1.25
R-factor: 0.1607
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.567
WCK2 WHAT_CHECK Ramachandran: -0.141
WCK3 WHAT_CHECK Chi angles: -0.259
WCK4 WHAT_CHECK Backbone: 2.967

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).