SPACI score report for 3kvt in ASTRAL 2.08:

PDB Entry: 3kvt
SPACI score: 0.42
AEROSPACI score: 0.42

Experiment type: XRAY
Resolution: 2
R-factor: 0.225
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -2.156
WCK2 WHAT_CHECK Ramachandran: -0.121
WCK3 WHAT_CHECK Chi angles: -0.703
WCK4 WHAT_CHECK Backbone: 3.844

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).