SPACI score report for 2pk2 in ASTRAL 1.75:

PDB Entry: 2pk2
SPACI score: 0.08
AEROSPACI score: 0.08

Experiment type: XRAY
Resolution: 2.67
R-factor: 0.274
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 4
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -4.041
WCK2 WHAT_CHECK Ramachandran: -6.566
WCK3 WHAT_CHECK Chi angles: -7.426
WCK4 WHAT_CHECK Backbone: -1.328

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).