SPACI score report for 2ayo in ASTRAL 2.06:

PDB Entry: 2ayo
SPACI score: 0.04
AEROSPACI score: 0.04

Experiment type: XRAY
Resolution: 3.5
R-factor: 0.29
PCK1 PROCHECK Ramachandran: 2
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -3.37
WCK2 WHAT_CHECK Ramachandran: -6.21
WCK3 WHAT_CHECK Chi angles: -4.308
WCK4 WHAT_CHECK Backbone: -2.733

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).