SPACI score report for 1a7n in ASTRAL 2.08:

PDB Entry: 1a7n
SPACI score: 0.47
AEROSPACI score: 0.47 (mutant; see below)

Experiment type: XRAY
Resolution: 2.01
R-factor: 0.155
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.137
WCK2 WHAT_CHECK Ramachandran: -0.134
WCK3 WHAT_CHECK Chi angles: -2.02
WCK4 WHAT_CHECK Backbone: 0.385

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: "Fv fragment only; mutant; part of Fv D1.3"

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).