SPACI score report for 3kff in ASTRAL 2.04:

PDB Entry: 3kff
SPACI score: 1.06
AEROSPACI score: 1.06

Experiment type: XRAY
Resolution: 0.96
R-factor: 0.136
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.754
WCK2 WHAT_CHECK Ramachandran: 0.236
WCK3 WHAT_CHECK Chi angles: 1.267
WCK4 WHAT_CHECK Backbone: -0.553

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).