SPACI score report for 2pkg in ASTRAL 2.08:

PDB Entry: 2pkg
SPACI score: 0.13
AEROSPACI score: 0.13

Experiment type: XRAY
Resolution: 3.3
R-factor: 0.247
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -2.299
WCK2 WHAT_CHECK Ramachandran: -7.117
WCK3 WHAT_CHECK Chi angles: -4.278
WCK4 WHAT_CHECK Backbone: -1.642

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).