SPACI score report for 2yfi in ASTRAL 2.05:

PDB Entry: 2yfi
SPACI score: 0.41
AEROSPACI score: 0.41

Experiment type: XRAY
Resolution: 2.15
R-factor: 0.20152
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.113
WCK2 WHAT_CHECK Ramachandran: -1.411
WCK3 WHAT_CHECK Chi angles: -0.462
WCK4 WHAT_CHECK Backbone: 2.546

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).