SPACI score report for 1u0n in ASTRAL 2.08:

PDB Entry: 1u0n
SPACI score: 0.2
AEROSPACI score: 0.2 (mutant; see below)

Experiment type: XRAY
Resolution: 2.95
R-factor: 0.213
PCK1 PROCHECK Ramachandran: 2
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -2.238
WCK2 WHAT_CHECK Ramachandran: -4.976
WCK3 WHAT_CHECK Chi angles: -2.906
WCK4 WHAT_CHECK Backbone: -1.505

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; automatically matched to d1m0za_; automatically matched to d1auq__; automatically matched to d1fvub_; automatically matched to d1fvua_; automated match to d1m0za_; automated match to d1auq__; automated match to d1fvua_; automated match to d1fvub_"

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).