SPACI score report for 3kth in ASTRAL 2.04:

PDB Entry: 3kth
SPACI score: 0.22
AEROSPACI score: 0.22

Experiment type: XRAY
Resolution: 3
R-factor: 0.248
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.664
WCK2 WHAT_CHECK Ramachandran: -3.574
WCK3 WHAT_CHECK Chi angles: -1.831
WCK4 WHAT_CHECK Backbone: 0.167

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).