SPACI score report for 1cun in ASTRAL 1.57:

PDB Entry: 1cun
SPACI score: 0.45
AEROSPACI score: 0.45 (mutant; see below)

Experiment type: XRAY
Resolution: 2
R-factor: 0.22
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: 3.419
WCK2 WHAT_CHECK Ramachandran: 2.953
WCK3 WHAT_CHECK Chi angles: 1.114
WCK4 WHAT_CHECK Backbone: 1.742

The AEROSPACI score for this entry is lower than the SPACI score because human-curated comments on the entry in SCOP contain the phrase mutant. The full comment is: "repeats 16 and 17 of alpha spectrin; mutant; repeats 16 and 17"

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).