SPACI score report for 2rbt in ASTRAL 2.03:

PDB Entry: 2rbt
SPACI score: 0.84
AEROSPACI score: 0.84

Experiment type: XRAY
Resolution: 1.24
R-factor: 0.123
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.774
WCK2 WHAT_CHECK Ramachandran: 0.1
WCK3 WHAT_CHECK Chi angles: 1.38
WCK4 WHAT_CHECK Backbone: 3.964

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).