SPACI score report for 3cup in ASTRAL 2.05:

PDB Entry: 3cup
SPACI score: 0.21
AEROSPACI score: 0.21

Experiment type: XRAY
Resolution: 3.09
R-factor: 0.235
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -0.687
WCK2 WHAT_CHECK Ramachandran: -3.348
WCK3 WHAT_CHECK Chi angles: -2.33
WCK4 WHAT_CHECK Backbone: 2.501

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).