SPACI score report for 1exd in ASTRAL 2.08:

PDB Entry: 1exd
SPACI score: 0.26
AEROSPACI score: 0.26 (mutant; see below)

Experiment type: XRAY
Resolution: 2.7
R-factor: 0.216
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -2.301
WCK2 WHAT_CHECK Ramachandran: -3.935
WCK3 WHAT_CHECK Chi angles: -3.262
WCK4 WHAT_CHECK Backbone: -0.528

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: "protein/tRNA complex; complexed with a, so4; 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).