SPACI score report for 1um2 in ASTRAL 1.69:

PDB Entry: 1um2
SPACI score: 0.19
AEROSPACI score: 0.19 (mutant; see below)

Experiment type: XRAY
Resolution: 2.9
R-factor: 0.214
PCK1 PROCHECK Ramachandran: 2
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -1.313
WCK2 WHAT_CHECK Ramachandran: -5.103
WCK3 WHAT_CHECK Chi angles: -3.563
WCK4 WHAT_CHECK Backbone: -5.534

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: "mutant; complexed with the ligated extein segment (SQ P17255 281-283,738-741), 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).