SPACI score report for 3esn in ASTRAL 2.03:

PDB Entry: 3esn
SPACI score: 0.73
AEROSPACI score: 0.73

Experiment type: XRAY
Resolution: 1.35
R-factor: 0.175
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 1.533
WCK2 WHAT_CHECK Ramachandran: 2.236
WCK3 WHAT_CHECK Chi angles: 1.129
WCK4 WHAT_CHECK Backbone: 2.004

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).