SPACI score report for 3l75 in ASTRAL 2.01:

PDB Entry: 3l75
SPACI score: 0.24
AEROSPACI score: 0.24

Experiment type: XRAY
Resolution: 2.79
R-factor: 0.248
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.959
WCK2 WHAT_CHECK Ramachandran: -3.009
WCK3 WHAT_CHECK Chi angles: -1.796
WCK4 WHAT_CHECK Backbone: 0.067

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).