SPACI score report for 1un0 in ASTRAL 2.08:

PDB Entry: 1un0
SPACI score: 0.3
AEROSPACI score: 0.3 (mutant; see below)

Experiment type: XRAY
Resolution: 2.6
R-factor: 0.21781
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.023
WCK2 WHAT_CHECK Ramachandran: -2.637
WCK3 WHAT_CHECK Chi angles: -2.117
WCK4 WHAT_CHECK Backbone: 0.228

The AEROSPACI score for this entry is lower than the SPACI score because human-curated comments on the entry in SCOPe contain the phrase mutant. The full comment is: "mutant; complexed with a nup2p N-terminal fragment, chains C and D"

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).