SPACI score report for 1yyf in ASTRAL 2.07:

PDB Entry: 1yyf
SPACI score: -0.04
AEROSPACI score: -0.04

Experiment type: XRAY
Resolution: 4.16
R-factor: 0.28
PCK1 PROCHECK Ramachandran: 2
PCK2 PROCHECK Chi-1 angle: 4
PCK3 PROCHECK H-bonds: 4
WCK1 WHAT_CHECK Packing: -3.594
WCK2 WHAT_CHECK Ramachandran: -7.17
WCK3 WHAT_CHECK Chi angles: -5.641
WCK4 WHAT_CHECK Backbone: -4.536

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).