SPACI score report for 2a8f in ASTRAL 2.08:

PDB Entry: 2a8f
SPACI score: 0.75
AEROSPACI score: 0.75

Experiment type: XRAY
Resolution: 1.35
R-factor: 0.141
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.136
WCK2 WHAT_CHECK Ramachandran: 1.923
WCK3 WHAT_CHECK Chi angles: -0.181
WCK4 WHAT_CHECK Backbone: 1.728

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).