SPACI score report for 1exu in ASTRAL 1.57:

PDB Entry: 1exu
SPACI score: 0.25
AEROSPACI score: 0.25

Experiment type: XRAY
Resolution: 2.7
R-factor: 0.197
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 4
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -2.759
WCK2 WHAT_CHECK Ramachandran: -1.116
WCK3 WHAT_CHECK Chi angles: -3.183
WCK4 WHAT_CHECK Backbone: 0.279

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).