SPACI score report for 4a46 in ASTRAL 2.03:

PDB Entry: 4a46
SPACI score: 0.49
AEROSPACI score: 0.49

Experiment type: XRAY
Resolution: 1.85
R-factor: 0.19416
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 1.124
WCK2 WHAT_CHECK Ramachandran: -1.312
WCK3 WHAT_CHECK Chi angles: -2.33
WCK4 WHAT_CHECK Backbone: 4.447

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).