SPACI score report for 1df9 in ASTRAL 1.71:

PDB Entry: 1df9
SPACI score: 0.36
AEROSPACI score: 0.36

Experiment type: XRAY
Resolution: 2.1
R-factor: 0.199
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -3.494
WCK2 WHAT_CHECK Ramachandran: -4.524
WCK3 WHAT_CHECK Chi angles: -0.737
WCK4 WHAT_CHECK Backbone: -8.728

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).