SPACI score report for 1du3 in ASTRAL 1.57:

PDB Entry: 1du3
SPACI score: 0.26
AEROSPACI score: 0.26

Experiment type: XRAY
Resolution: 2.2
R-factor: 0.291
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -3.287
WCK2 WHAT_CHECK Ramachandran: -2.196
WCK3 WHAT_CHECK Chi angles: -3.137
WCK4 WHAT_CHECK Backbone: -0.133

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).