SPACI score report for 2nng in ASTRAL 2.03:

PDB Entry: 2nng
SPACI score: 0.86
AEROSPACI score: 0.86

Experiment type: XRAY
Resolution: 1.2
R-factor: 0.13
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.839
WCK2 WHAT_CHECK Ramachandran: -0.494
WCK3 WHAT_CHECK Chi angles: 0.343
WCK4 WHAT_CHECK Backbone: 1.986

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).