SPACI score report for 2a2o in ASTRAL 1.73:

PDB Entry: 2a2o
SPACI score: 0.48
AEROSPACI score: 0.48

Experiment type: XRAY
Resolution: 2.16
R-factor: 0.145
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: 0.086
WCK2 WHAT_CHECK Ramachandran: 1.048
WCK3 WHAT_CHECK Chi angles: 0.78
WCK4 WHAT_CHECK Backbone: -3.667

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).