SPACI score report for 5ttr in ASTRAL 2.03:

PDB Entry: 5ttr
SPACI score: 0.27
AEROSPACI score: 0.27 (mutant; see below)

Experiment type: XRAY
Resolution: 2.7
R-factor: 0.199
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 3
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.057
WCK2 WHAT_CHECK Ramachandran: -0.328
WCK3 WHAT_CHECK Chi angles: -5.44
WCK4 WHAT_CHECK Backbone: 0.439

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"

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).