SPACI score report for 2ppb in ASTRAL 2.08:

PDB Entry: 2ppb
SPACI score: 0.16
AEROSPACI score: 0.16

Experiment type: XRAY
Resolution: 3
R-factor: 0.234
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -3.325
WCK2 WHAT_CHECK Ramachandran: -4.397
WCK3 WHAT_CHECK Chi angles: -6.627
WCK4 WHAT_CHECK Backbone: 0.626

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).