SPACI score report for 2a6h in ASTRAL 2.07:

PDB Entry: 2a6h
SPACI score: 0.24
AEROSPACI score: 0.24

Experiment type: XRAY
Resolution: 2.4
R-factor: 0.23
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -3.802
WCK2 WHAT_CHECK Ramachandran: -5.501
WCK3 WHAT_CHECK Chi angles: -6.615
WCK4 WHAT_CHECK Backbone: -2.726

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).