SPACI score report for 2r6d in ASTRAL 2.08:

PDB Entry: 2r6d
SPACI score: 0.06
AEROSPACI score: 0.06

Experiment type: XRAY
Resolution: 3.7
R-factor: 0.31
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.353
WCK2 WHAT_CHECK Ramachandran: -3.742
WCK3 WHAT_CHECK Chi angles: -3.535
WCK4 WHAT_CHECK Backbone: 2.229

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).