SPACI score report for 2d31 in ASTRAL 2.03:

PDB Entry: 2d31
SPACI score: 0.16
AEROSPACI score: 0.16

Experiment type: XRAY
Resolution: 3.2
R-factor: 0.239
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.86
WCK2 WHAT_CHECK Ramachandran: -3.42
WCK3 WHAT_CHECK Chi angles: -5.611
WCK4 WHAT_CHECK Backbone: -0.408

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).