SPACI score report for 1nkr in ASTRAL 1.55:

PDB Entry: 1nkr
SPACI score: 0.51
AEROSPACI score: 0.51

Experiment type: XRAY
Resolution: 1.7
R-factor: 0.205
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.359
WCK2 WHAT_CHECK Ramachandran: 0.291
WCK3 WHAT_CHECK Chi angles: -0.672
WCK4 WHAT_CHECK Backbone: -0.974

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).