SPACI score report for 3ddu in ASTRAL 2.05:

PDB Entry: 3ddu
SPACI score: 0.64
AEROSPACI score: 0.64

Experiment type: XRAY
Resolution: 1.56
R-factor: 0.149
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.97
WCK2 WHAT_CHECK Ramachandran: -0.772
WCK3 WHAT_CHECK Chi angles: 1.047
WCK4 WHAT_CHECK Backbone: -0.374

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).