SPACI score report for 2pl6 in ASTRAL 2.01:

PDB Entry: 2pl6
SPACI score: 0.32
AEROSPACI score: 0.32

Experiment type: XRAY
Resolution: 2.2
R-factor: 0.224
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -2.538
WCK2 WHAT_CHECK Ramachandran: -3.245
WCK3 WHAT_CHECK Chi angles: -1.987
WCK4 WHAT_CHECK Backbone: -1.978

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).